[misc] correct fp32 checkpoint size to measured 741 GiB (was ~528 estimate)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.agents/lessons/2026-08-14_h3-dmd2-training-preflight-rules.md

@@ -0,0 +1,120 @@
+---
+date: 2026-08-14
+experiment: feat/h3-dmd2-vsa — data-free DMD2 distillation of MiniMax-H3 (33B, video+audio) on NVL72 GB200
+category: training
+severity: critical
+---
+
+# Preflight Rules for Large-Model Distillation Runs (distilled from the H3 DMD2 v1–v5 lineage)
+
+Every rule below is a real failure we shipped, diagnosed, and fixed across
+five production launches. Rules are grouped; each states the check, the
+failure it prevents, and where it is now enforced in code (if it is).
+
+## Numerics
+
+1. **Master weights must be fp32.** In-place optimizer steps on bf16 params
+   round away updates below ~half an ulp of each weight's magnitude:
+   O(1)-magnitude norm gains froze **bit-identically for 1000 steps**
+   (205/211 tensors) at lr 2e-6, silently capping convergence. Enforced:
+   `fastvideo/train/trainer.py::_verify_master_weight_precision` and
+   `fastvideo/training/training_utils.py::verify_master_weight_precision`
+   hard-fail at train start (opt-outs:
+   `training.model.allow_low_precision_master_weights`,
+   `FASTVIDEO_ALLOW_LOW_PRECISION_MASTER_WEIGHTS=1`).
+2. **Optimizer second moments must be fp32 regardless of param dtype.**
+   `torch.zeros_like(p)` inherits the starved dtype; bf16 `exp_avg_sq` loses
+   g² increments below ~0.4% of its running magnitude. Enforced in
+   `AdamWBeta1Zero` (fp32 state + fp32 update math for non-fp32 params).
+3. **Do not copy inference precision defaults into training configs.**
+   `PipelineConfig.dit_precision` defaults to bf16 (inference); training
+   YAMLs that copy it inherit rule-1's failure. `dit_precision: fp32` costs
+   only sharded-master memory — FSDP `param_dtype=bf16` keeps compute speed
+   (measured: no step-time change at 33B).
+4. **Post-hoc freeze check (cheap, mapping-free):** base checkpoints are
+   stored bf16, so any fp32-updated tensor is almost surely no longer
+   exactly bf16-representable. Census a checkpoint's norm params for
+   `x != bf16(x)` fractions — near-zero fractions mean weights are not
+   moving. Verified on the v5 lineage: at checkpoint-500 with fp32 masters,
+   210/210 student norm tensors moved (median 99.9% of elements), vs
+   205/211 bit-frozen after 1000 bf16 steps.
+
+## Schedules and shifts
+
+5. **Recompute every timestep-space constant through the model's actual
+   shift map** (`sigma' = s*t / (1 + (s-1)t)`). The Wan-copied ladder
+   `[1000,757,522]` under H3's video shift 12 produced sigma
+   {1.0, 0.974, 0.929} — a near-no-op middle step and an 86% final jump.
+   Re-spaced to `[1000,667,333]` (uniform base-t, the same design rule the
+   Wan recipe uses pre-warp).
+6. **Check supervision *density* in sigma space, not t space.** Uniform-t
+   sampling under shift 12 put 57% of score-model draws at sigma_v > 0.9 and
+   ~0% below 0.2. Fix: `method.score_timestep_shift` (sample uniform in
+   shifted-sigma, invert to base-t). Verify any new sampler with a quantile
+   census before launching.
+7. **Shared timestep-ratio bounds hit modalities asymmetrically.** With
+   min_ratio 0.02, video's supervision floor was sigma 0.197 while audio's
+   was 0.057 (shift 12 vs 3). Derive per-modality sigma floors from the
+   ratios; H3 uses 0.005.
+8. **Know whether a step list is consumed in base-t or shifted space.**
+   `warp_denoising_step` maps the list through the (video) scheduler's
+   shifted grid; H3's adapter *also* shifts per modality internally —
+   enabling warp double-shifts. Wan needs warp on; H3 needs it off.
+
+## Packed multi-modality
+
+9. **Never take a single mean loss over a packed multi-modality sequence.**
+   H3 packs video:audio at ~270:1 elements; a packed mean silently trains
+   only video. Compute per-modality losses via `modality_slices()` and log
+   each stream (`*_video`, `*_audio`) separately.
+
+## Distillation specifics
+
+10. **Check whether the teacher is guidance-distilled before configuring
+    CFG.** H3's released checkpoint rejects CFG at inference; correct
+    setting is `real_score_guidance_scale: 1.0`, and DMD2 then skips the
+    unconditional teacher forward entirely (free speedup).
+11. **Read DMD scalars as game state, not quality.** Generator loss =
+    normalized critic–teacher disagreement at student samples (healthy band
+    ~0.2–1.0; it *rises* from ~0 as the critic specializes away from its
+    teacher init). Critic flow-matching loss = tracking meter (falling =
+    keeping up). The 10x-LR blowup signature: critic loss exploding (5.2)
+    plus student grad-norms pinned above clip (1.8–2.5 vs 1.0) — a run that
+    reports 10x LR but delivers ~4x, into a broken critic.
+12. **Grad-norm vs clip tells you the LR you actually delivered.** Isolated
+    spikes above clip that mean-revert are normal equilibration; sustained
+    saturation means the configured LR is a lie.
+13. **Sampler A/Bs need a teacher control and matched seeds.** The
+    stochastic-vs-deterministic verdict on a student is meaningless without
+    knowing the teacher's own behavior under both hop rules (teacher x0
+    overshoot at sigma≈1, std 2.33, dominated ours). File-size heuristics
+    on encoded video are not a quality signal — high bitrate can be noise.
+
+## Run ops
+
+14. **Requeue-safe by default:** `resume_from_checkpoint: latest` +
+    `sbatch --requeue`. DCP restores optimizer LRs over the YAML — use
+    `reset_lr_on_resume: true` for LR-change experiments.
+15. **Budget checkpoint disk before launch:** save size × retention vs
+    filesystem free. fp32 masters tripled saves to 741 GB (measured; student+critic params + fp32 second moments); lustre at 98%
+    would have killed the run at its 4th save. `checkpoints_total_limit`
+    is part of the launch math, not a detail.
+16. **Verify W&B auth (`wandb.Api().viewer` with the job's $HOME) before
+    every launch**; the tracker now degrades online→offline→none instead of
+    crashing 32 GPUs on a rotated key. Confirm step-0 media actually
+    uploaded — the uploader has died on the first video burst before.
+17. **Unique `run_name` per launch attempt.** Three runs sharing one name
+    made W&B show another run's config (the "DP=12" confusion).
+18. **Cluster quirks (Slinky/GB200):** compute pods have no /home (export
+    HOME=lustre in every sbatch; submit with a lustre --chdir); PENDing
+    jobs are what make the autoscaler create nodes (warmup-ladder + race
+    for multi-node); released nodes deregister in seconds; boot watchdog +
+    NCCL env pins for the silent IB comm-init wedge; `scontrol release`
+    after "launch failed requeued held"; Slurm requeues silently truncate
+    stdout (check elapsed vs log).
+19. **Exports and deletions:** cross-user hardlinks are blocked
+    (fs.protected_hardlinks) — use `--link-base` symlink exports (~66 GB vs
+    465 GB); always clear stale `*.safetensors.index.json` when rewriting a
+    module dir (a leftover base index shadows the fresh weights); before any
+    rm of run artifacts, verify no symlinks/hardlinks point into originals
+    and that the target is regenerable.

.agents/skills/add-model-01-prep/scripts/clone_reference_repo.py

@@ -10,9 +10,7 @@ from pathlib import Path
 
 
 def parse_args() -> argparse.Namespace:
-    parser = argparse.ArgumentParser(
-        description="Clone a reference repo for FastVideo parity tests."
-    )
+    parser = argparse.ArgumentParser(description="Clone a reference repo for FastVideo parity tests.")
     parser.add_argument("repo_url", help="Official reference repository URL")
     parser.add_argument("target_dir", help="Directory to clone into")
     parser.add_argument("--branch", help="Branch or tag to clone")
@@ -62,9 +60,7 @@ def gitignore_entry_for(target: Path) -> str:
     try:
         relative = resolved.relative_to(root)
     except ValueError as exc:
-        raise ValueError(
-            "--update-gitignore requires target_dir to be under the current directory"
-        ) from exc
+        raise ValueError("--update-gitignore requires target_dir to be under the current directory") from exc
 
     text = relative.as_posix().rstrip("/")
     return "/" + text + "/"

.agents/skills/add-model-01-prep/scripts/download_hf_weights.py

@@ -8,14 +8,12 @@ import os
 import sys
 from pathlib import Path
 
-
 HF_TOKEN_ENV_KEYS = ("HF_TOKEN", "HUGGINGFACE_HUB_TOKEN", "HF_API_KEY")
 
 
 def parse_args() -> argparse.Namespace:
     parser = argparse.ArgumentParser(
-        description="Download a HF model snapshot or selected files into a local directory."
-    )
+        description="Download a HF model snapshot or selected files into a local directory.")
     parser.add_argument("repo_id", help="HF repo id, for example Org/Model")
     parser.add_argument("local_dir", help="Destination directory")
     parser.add_argument("--repo-type", default="model", help="HF repo type (default: model)")

.agents/skills/add-model-01-prep/scripts/inspect_hf_layout.py

@@ -10,7 +10,6 @@ import sys
 from pathlib import Path
 from typing import Any
 
-
 HF_TOKEN_ENV_KEYS = ("HF_TOKEN", "HUGGINGFACE_HUB_TOKEN", "HF_API_KEY")
 RAW_WEIGHT_SUFFIXES = (".safetensors", ".pt", ".pth", ".ckpt", ".bin")
 KNOWN_COMPONENTS = {
@@ -34,8 +33,7 @@ KNOWN_COMPONENTS = {
 
 def parse_args() -> argparse.Namespace:
     parser = argparse.ArgumentParser(
-        description="Classify a HF repo or local directory as Diffusers, raw, custom, or unknown."
-    )
+        description="Classify a HF repo or local directory as Diffusers, raw, custom, or unknown.")
     parser.add_argument("source", help="HF repo id or local weights directory")
     parser.add_argument("--repo-type", default="model", help="HF repo type (default: model)")
     parser.add_argument("--revision", help="HF revision to inspect")
@@ -94,14 +92,12 @@ def load_remote_files(
 ) -> list[str]:
     from huggingface_hub import list_repo_files
 
-    return sorted(
-        list_repo_files(
-            repo_id,
-            repo_type=repo_type,
-            revision=revision,
-            token=token,
-        )
-    )
+    return sorted(list_repo_files(
+        repo_id,
+        repo_type=repo_type,
+        revision=revision,
+        token=token,
+    ))
 
 
 def load_remote_model_index(
@@ -215,24 +211,24 @@ def build_result(args: argparse.Namespace) -> dict[str, Any]:
         "components_seen": components,
         "file_count": len(files),
         "file_scan_truncated": truncated,
-        "files_sample": files[: args.sample_limit],
+        "files_sample": files[:args.sample_limit],
     }
 
 
 def print_human(result: dict[str, Any]) -> None:
     for key in (
-        "source",
-        "source_kind",
-        "repo_type",
-        "revision",
-        "token_env",
-        "source_layout",
-        "needs_conversion",
-        "model_index_class",
-        "model_index_diffusers_version",
-        "model_index_error",
-        "file_count",
-        "file_scan_truncated",
+            "source",
+            "source_kind",
+            "repo_type",
+            "revision",
+            "token_env",
+            "source_layout",
+            "needs_conversion",
+            "model_index_class",
+            "model_index_diffusers_version",
+            "model_index_error",
+            "file_count",
+            "file_scan_truncated",
     ):
         value = result.get(key)
         if value is not None:

.agents/skills/add-model-02-parity/templates/component_parity_test.py

@@ -18,7 +18,6 @@ import pytest
 import torch
 from torch.testing import assert_close
 
-
 os.environ.setdefault("MASTER_ADDR", "localhost")
 os.environ.setdefault("MASTER_PORT", "29519")
 os.environ.setdefault("DISABLE_SP", "1")
@@ -35,15 +34,10 @@ FASTVIDEO_CONFIG_CLASS = "<FastVideoConfig>"  # TODO.
 FASTVIDEO_MODEL_MODULE = "fastvideo.models.<bucket>.<module>"  # TODO.
 FASTVIDEO_MODEL_CLASS = "<FastVideoModel>"  # TODO.
 
-OFFICIAL_REF_DIR = Path(
-    os.getenv("<FAMILY_UPPER>_OFFICIAL_REF_DIR", REPO_ROOT / "<ReferenceDir>")
-)
-LOCAL_WEIGHTS_DIR = Path(
-    os.getenv("<FAMILY_UPPER>_LOCAL_WEIGHTS_DIR", REPO_ROOT / "official_weights" / FAMILY)
-)
-CONVERTED_WEIGHTS_DIR = Path(
-    os.getenv("<FAMILY_UPPER>_CONVERTED_WEIGHTS_DIR", REPO_ROOT / "converted_weights" / FAMILY)
-)
+OFFICIAL_REF_DIR = Path(os.getenv("<FAMILY_UPPER>_OFFICIAL_REF_DIR", REPO_ROOT / "<ReferenceDir>"))
+LOCAL_WEIGHTS_DIR = Path(os.getenv("<FAMILY_UPPER>_LOCAL_WEIGHTS_DIR", REPO_ROOT / "official_weights" / FAMILY))
+CONVERTED_WEIGHTS_DIR = Path(os.getenv("<FAMILY_UPPER>_CONVERTED_WEIGHTS_DIR",
+                                       REPO_ROOT / "converted_weights" / FAMILY))
 
 
 def _resolve_hf_token() -> str | None:
@@ -99,18 +93,14 @@ def _load_official_model(device: torch.device, dtype: torch.dtype) -> torch.nn.M
     model = OfficialClass()  # TODO: pass official config kwargs.
     state_dict = {}  # TODO: load official state dict from LOCAL_WEIGHTS_DIR.
     missing, unexpected = model.load_state_dict(state_dict, strict=True)
-    assert not missing and not unexpected, (
-        f"official load mismatch missing={missing[:5]} unexpected={unexpected[:5]}"
-    )
+    assert not missing and not unexpected, (f"official load mismatch missing={missing[:5]} unexpected={unexpected[:5]}")
     return model.to(device=device, dtype=dtype).eval()
 
 
 def _load_fastvideo_model(device: torch.device, dtype: torch.dtype) -> torch.nn.Module:
     """Load the FastVideo component with the same tensor content."""
     if not CONVERTED_WEIGHTS_DIR.exists() and not LOCAL_WEIGHTS_DIR.exists():
-        pytest.skip(
-            f"No FastVideo loadable weights: {CONVERTED_WEIGHTS_DIR} or {LOCAL_WEIGHTS_DIR}"
-        )
+        pytest.skip(f"No FastVideo loadable weights: {CONVERTED_WEIGHTS_DIR} or {LOCAL_WEIGHTS_DIR}")
 
     # TODO: replace with the bucket-specific FastVideo config/class/loader.
     # DiT examples:
@@ -127,8 +117,7 @@ def _load_fastvideo_model(device: torch.device, dtype: torch.dtype) -> torch.nn.
     state_dict = {}  # TODO: load converted or directly mapped state dict.
     missing, unexpected = model.load_state_dict(state_dict, strict=True)
     assert not missing and not unexpected, (
-        f"FastVideo load mismatch missing={missing[:5]} unexpected={unexpected[:5]}"
-    )
+        f"FastVideo load mismatch missing={missing[:5]} unexpected={unexpected[:5]}")
     return model.to(device=device, dtype=dtype).eval()
 
 
@@ -187,11 +176,9 @@ def test_component_parity():
 
     assert official_out.shape == fastvideo_out.shape
     diff = (official_out - fastvideo_out).abs()
-    print(
-        f"official abs_mean={official_out.abs().mean().item():.6f} "
-        f"fastvideo abs_mean={fastvideo_out.abs().mean().item():.6f} "
-        f"diff_max={diff.max().item():.6f} diff_mean={diff.mean().item():.6f}"
-    )
+    print(f"official abs_mean={official_out.abs().mean().item():.6f} "
+          f"fastvideo abs_mean={fastvideo_out.abs().mean().item():.6f} "
+          f"diff_max={diff.max().item():.6f} diff_mean={diff.mean().item():.6f}")
 
     # TODO: pick tolerance by scope:
     # - single block / same kernel: 1e-4

.agents/skills/add-model-07-conversion/templates/family_to_diffusers.py

@@ -27,7 +27,6 @@ try:
 except ImportError:  # pragma: no cover - optional local conversion dependency
     snapshot_download = None
 
-
 # TODO: fill with authoritative component prefixes for monolithic checkpoints.
 # Example: {"model.model.": "transformer", "pretransform.model.": "vae"}
 COMPONENT_PREFIXES: dict[str, str] = {}
@@ -47,10 +46,7 @@ SKIP_PATTERNS: tuple[str, ...] = ()
 
 
 def _hf_token() -> str | None:
-    return (
-        os.environ.get("HF_TOKEN") or os.environ.get("HUGGINGFACE_HUB_TOKEN")
-        or os.environ.get("HF_API_KEY")
-    )
+    return (os.environ.get("HF_TOKEN") or os.environ.get("HUGGINGFACE_HUB_TOKEN") or os.environ.get("HF_API_KEY"))
 
 
 def resolve_src(src: str, revision: str | None) -> Path:
@@ -95,11 +91,10 @@ def apply_mapping(key: str) -> str | None:
     return key
 
 
-def split_monolithic(
-    state: dict[str, torch.Tensor],
-) -> dict[str, OrderedDict[str, torch.Tensor]]:
+def split_monolithic(state: dict[str, torch.Tensor], ) -> dict[str, OrderedDict[str, torch.Tensor]]:
     components: dict[str, OrderedDict[str, torch.Tensor]] = {
-        name: OrderedDict() for name in set(COMPONENT_PREFIXES.values())
+        name: OrderedDict()
+        for name in set(COMPONENT_PREFIXES.values())
     }
     intentionally_skipped: list[str] = []
     unowned: list[str] = []
@@ -117,10 +112,8 @@ def split_monolithic(
             unowned.append(key)
     if unowned:
         sample = ", ".join(unowned[:10])
-        raise ValueError(
-            f"Unowned monolithic keys: {len(unowned)}. "
-            f"Add COMPONENT_PREFIXES or SKIP_PATTERNS entries. Sample: {sample}"
-        )
+        raise ValueError(f"Unowned monolithic keys: {len(unowned)}. "
+                         f"Add COMPONENT_PREFIXES or SKIP_PATTERNS entries. Sample: {sample}")
     if intentionally_skipped:
         print(f"Intentionally skipped {len(intentionally_skipped)} keys")
     return {name: weights for name, weights in components.items() if weights}
@@ -143,8 +136,12 @@ def build_component_configs(_src_dir: Path) -> dict[str, dict[str, Any]]:
     # TODO: emit config content accepted by FastVideo loaders. Most components use
     # config.json; schedulers use scheduler_config.json.
     return {
-        "transformer": {"_class_name": "<FastVideoTransformerClass>"},
-        "vae": {"_class_name": "<FastVideoVAEClass>"},
+        "transformer": {
+            "_class_name": "<FastVideoTransformerClass>"
+        },
+        "vae": {
+            "_class_name": "<FastVideoVAEClass>"
+        },
     }
 
 
@@ -177,19 +174,13 @@ def build_model_index(
     }
     if revision:
         index["_fastvideo_converted_revision"] = revision
-    return {
-        key: value
-        for key, value in index.items()
-        if key.startswith("_") or key in available_components
-    }
+    return {key: value for key, value in index.items() if key.startswith("_") or key in available_components}
 
 
 def validate_component_configs(configs: dict[str, dict[str, Any]]) -> None:
     # TODO: instantiate each FastVideo config and call update_model_arch(...) or
     # update_model_config(...) with this JSON so unknown emitted keys fail here.
-    placeholder_configs = [
-        name for name, config in configs.items() if "<" in json.dumps(config)
-    ]
+    placeholder_configs = [name for name, config in configs.items() if "<" in json.dumps(config)]
     if placeholder_configs:
         raise ValueError(f"Replace config placeholders for: {placeholder_configs}")
 
@@ -201,9 +192,7 @@ def verify_conversion(
     del dst_dir, components
     # TODO: load each emitted stateful component through its production loader and
     # assert strict load, or document exact allowed missing/unexpected keys.
-    raise NotImplementedError(
-        "Implement production config validation and strict-load checks"
-    )
+    raise NotImplementedError("Implement production config validation and strict-load checks")
 
 
 def write_component(
@@ -216,9 +205,7 @@ def write_component(
     if component_dir.exists() and any(component_dir.iterdir()):
         shutil.rmtree(component_dir)
     component_dir.mkdir(parents=True, exist_ok=True)
-    save_file(
-        dict(state), str(component_dir / "diffusion_pytorch_model.safetensors")
-    )
+    save_file(dict(state), str(component_dir / "diffusion_pytorch_model.safetensors"))
     if config is not None:
         config_path = component_dir / config_filename(name)
         with config_path.open("w", encoding="utf-8") as f:
@@ -261,9 +248,7 @@ def convert(
 
     if layout in {"monolithic", "raw_official"}:
         # TODO: replace model.safetensors with the official monolithic file name.
-        components = split_monolithic(
-            load_checkpoint(default_monolithic_checkpoint(src_path))
-        )
+        components = split_monolithic(load_checkpoint(default_monolithic_checkpoint(src_path)))
     elif layout in {"separate_components", "mixed"}:
         if not src_path.is_dir():
             raise ValueError(f"{layout} layout requires a source directory: {src_path}")
@@ -271,9 +256,7 @@ def convert(
     else:
         raise ValueError(f"Unsupported template layout: {layout}")
 
-    copied = (
-        copy_passthrough(src_path, dst_dir) if src_path.is_dir() else []
-    )
+    copied = (copy_passthrough(src_path, dst_dir) if src_path.is_dir() else [])
     configs = build_component_configs(src_path if src_path.is_dir() else src_path.parent)
     validate_component_configs(configs)
     for name, state in components.items():
@@ -289,9 +272,7 @@ def convert(
 
 def main() -> None:
     parser = argparse.ArgumentParser(description=__doc__)
-    parser.add_argument(
-        "--src", required=True, help="HF repo id, local dir, or checkpoint path"
-    )
+    parser.add_argument("--src", required=True, help="HF repo id, local dir, or checkpoint path")
     parser.add_argument("--revision", help="HF branch, tag, or commit for repo sources")
     parser.add_argument(
         "--dst",

.agents/skills/add-model-08-trace/templates/block_trace_debug.py

@@ -24,8 +24,8 @@ from typing import Any
 
 import torch
 
-FAMILY: str = "<family>"       # e.g. "magi_human", "ltx2", "wan"
-COMPONENT: str = "<component>" # e.g. "dit", "vae", "encoder"
+FAMILY: str = "<family>"  # e.g. "magi_human", "ltx2", "wan"
+COMPONENT: str = "<component>"  # e.g. "dit", "vae", "encoder"
 DRILL_LAYER_ENV: str = "<FAMILY>_DEBUG_DRILL_LAYER"
 HYPOTHESIS_ENV: str = "<FAMILY>_DEBUG_PATCH_<HYPOTHESIS>"
 REL_THRESHOLD: float = 0.005  # 0.5% abs_mean drift flags a block as divergent
@@ -94,6 +94,7 @@ def _attach_block_hooks(
     handles: list[Any] = []
 
     def _hook(name: str):
+
         def fn(_module, _inputs, outputs):
             t = outputs[0] if isinstance(outputs, tuple) else outputs
             if not torch.is_tensor(t):
@@ -101,6 +102,7 @@ def _attach_block_hooks(
             log.append({"side": label, **_stat(name, t)})
             if tensors is not None:
                 tensors[name] = t.detach().float().cpu()
+
         return fn
 
     def _pre_hook(name: str):
@@ -114,6 +116,7 @@ def _attach_block_hooks(
             log.append({"side": label, **_stat(key, t)})
             if tensors is not None:
                 tensors[key] = t.detach().float().cpu()
+
         return fn
 
     # TODO: adapt attribute paths to your model. Remove adapter block if absent.
@@ -131,43 +134,21 @@ def _attach_block_hooks(
             # magi-human uses: attention, mlp.pre_norm, mlp.up_gate_proj,
             # mlp.down_proj (pre+post), mlp, attn_post_norm, mlp_post_norm.
             if hasattr(layer, "attention"):
-                handles.append(
-                    layer.attention.register_forward_hook(_hook(f"{tag}.attention"))
-                )
+                handles.append(layer.attention.register_forward_hook(_hook(f"{tag}.attention")))
             if hasattr(layer, "mlp"):
                 mlp = layer.mlp
                 if hasattr(mlp, "pre_norm"):
-                    handles.append(
-                        mlp.pre_norm.register_forward_hook(_hook(f"{tag}.mlp.pre_norm"))
-                    )
+                    handles.append(mlp.pre_norm.register_forward_hook(_hook(f"{tag}.mlp.pre_norm")))
                 if hasattr(mlp, "up_gate_proj"):
-                    handles.append(
-                        mlp.up_gate_proj.register_forward_hook(
-                            _hook(f"{tag}.mlp.up_gate_proj")
-                        )
-                    )
+                    handles.append(mlp.up_gate_proj.register_forward_hook(_hook(f"{tag}.mlp.up_gate_proj")))
                 if hasattr(mlp, "down_proj"):
-                    handles.append(
-                        mlp.down_proj.register_forward_pre_hook(
-                            _pre_hook(f"{tag}.mlp.down_proj")
-                        )
-                    )
-                    handles.append(
-                        mlp.down_proj.register_forward_hook(_hook(f"{tag}.mlp.down_proj"))
-                    )
+                    handles.append(mlp.down_proj.register_forward_pre_hook(_pre_hook(f"{tag}.mlp.down_proj")))
+                    handles.append(mlp.down_proj.register_forward_hook(_hook(f"{tag}.mlp.down_proj")))
                 handles.append(mlp.register_forward_hook(_hook(f"{tag}.mlp")))
             if hasattr(layer, "attn_post_norm"):
-                handles.append(
-                    layer.attn_post_norm.register_forward_hook(
-                        _hook(f"{tag}.attn_post_norm")
-                    )
-                )
+                handles.append(layer.attn_post_norm.register_forward_hook(_hook(f"{tag}.attn_post_norm")))
             if hasattr(layer, "mlp_post_norm"):
-                handles.append(
-                    layer.mlp_post_norm.register_forward_hook(
-                        _hook(f"{tag}.mlp_post_norm")
-                    )
-                )
+                handles.append(layer.mlp_post_norm.register_forward_hook(_hook(f"{tag}.mlp_post_norm")))
     return handles
 
 
@@ -193,11 +174,9 @@ def _write_log(entries: list[dict], path: Path) -> None:
     path.parent.mkdir(parents=True, exist_ok=True)
     with open(path, "w") as f:
         for e in entries:
-            f.write(
-                f"{e['name']} {e['shape']} "
-                f"{e['abs_mean']:.8f} {e['sum']:.4f} "
-                f"{e['min']:.6f} {e['max']:.6f}\n"
-            )
+            f.write(f"{e['name']} {e['shape']} "
+                    f"{e['abs_mean']:.8f} {e['sum']:.4f} "
+                    f"{e['min']:.6f} {e['max']:.6f}\n")
 
 
 def _sort_key(name: str, drill_layer: int) -> tuple:
@@ -205,9 +184,14 @@ def _sort_key(name: str, drill_layer: int) -> tuple:
         return (0, "")
     if name.startswith(f"L{drill_layer:02d}."):
         sub_order = {
-            "attention": 0, "attn_post_norm": 1, "mlp.pre_norm": 2,
-            "mlp.up_gate_proj": 3, "mlp.down_proj<in>": 4,
-            "mlp.down_proj": 5, "mlp": 6, "mlp_post_norm": 7,
+            "attention": 0,
+            "attn_post_norm": 1,
+            "mlp.pre_norm": 2,
+            "mlp.up_gate_proj": 3,
+            "mlp.down_proj<in>": 4,
+            "mlp.down_proj": 5,
+            "mlp": 6,
+            "mlp_post_norm": 7,
         }.get(name.split(".", 1)[1], 9)
         return (1, f"block[{drill_layer:02d}]", sub_order)
     if name.startswith("block["):
@@ -216,10 +200,8 @@ def _sort_key(name: str, drill_layer: int) -> tuple:
 
 
 def _print_table(by_name: dict[str, dict], drill_layer: int) -> int | None:
-    hdr = (
-        f"{'name':<18} {'up_shape':<22} {'up_absmean':>12} {'fv_absmean':>12} "
-        f"{'absmean_diff':>14} {'rel%':>8} {'up_sum':>14} {'fv_sum':>14} {'sum_diff':>12}"
-    )
+    hdr = (f"{'name':<18} {'up_shape':<22} {'up_absmean':>12} {'fv_absmean':>12} "
+           f"{'absmean_diff':>14} {'rel%':>8} {'up_sum':>14} {'fv_sum':>14} {'sum_diff':>12}")
     print(f"\n{hdr}\n{'-' * len(hdr)}")
     first_div: int | None = None
     for name in sorted(by_name.keys(), key=lambda n: _sort_key(n, drill_layer)):
@@ -235,11 +217,9 @@ def _print_table(by_name: dict[str, dict], drill_layer: int) -> int | None:
             flag = " <<< DIVERGE"
             if first_div is None:
                 first_div = int(name[len("block["):-1])
-        print(
-            f"{name:<18} {str(up['shape']):<22} {up['abs_mean']:>12.6f} "
-            f"{fv['abs_mean']:>12.6f} {am_diff:>14.6f} {am_rel * 100:>7.3f}% "
-            f"{up['sum']:>14.4f} {fv['sum']:>14.4f} {sum_diff:>12.4f}{flag}"
-        )
+        print(f"{name:<18} {str(up['shape']):<22} {up['abs_mean']:>12.6f} "
+              f"{fv['abs_mean']:>12.6f} {am_diff:>14.6f} {am_rel * 100:>7.3f}% "
+              f"{up['sum']:>14.4f} {fv['sum']:>14.4f} {sum_diff:>12.4f}{flag}")
     return first_div
 
 
@@ -255,10 +235,8 @@ def _print_elementwise(up_t: dict[str, torch.Tensor], fv_t: dict[str, torch.Tens
             continue
         diff = (a - b).abs()
         rel = (diff.mean().item() / max(a.abs().mean().item(), 1e-9)) * 100
-        print(
-            f"{name:<30} {str(tuple(a.shape)):<22} "
-            f"{diff.max().item():>12.6f} {diff.mean().item():>12.6f} {rel:>9.4f}%"
-        )
+        print(f"{name:<30} {str(tuple(a.shape)):<22} "
+              f"{diff.max().item():>12.6f} {diff.mean().item():>12.6f} {rel:>9.4f}%")
 
 
 def main() -> None:

.agents/skills/add-model-09-pipeline/templates/pipeline_parity_test.py

@@ -43,12 +43,10 @@ def _add_official_to_path() -> Path:
 
 def _log_tensor_stats(label: str, tensor: torch.Tensor) -> None:
     value = tensor.detach().float()
-    print(
-        f"[{_MODEL_FAMILY} PIPELINE] {label}: shape={tuple(tensor.shape)} "
-        f"dtype={tensor.dtype} device={tensor.device} "
-        f"min={value.min().item():.6f} max={value.max().item():.6f} "
-        f"mean={value.mean().item():.6f} std={value.std().item():.6f}"
-    )
+    print(f"[{_MODEL_FAMILY} PIPELINE] {label}: shape={tuple(tensor.shape)} "
+          f"dtype={tensor.dtype} device={tensor.device} "
+          f"min={value.min().item():.6f} max={value.max().item():.6f} "
+          f"mean={value.mean().item():.6f} std={value.std().item():.6f}")
 
 
 def _extract_tensor(output: Any, key: str) -> torch.Tensor:
@@ -73,10 +71,8 @@ def _run_official_pipeline(
     device: torch.device,
 ) -> Any:
     del official_path, params, device
-    pytest.skip(
-        "TODO: import the official pipeline/factory, load official weights, "
-        "run with params, and return the comparison target."
-    )
+    pytest.skip("TODO: import the official pipeline/factory, load official weights, "
+                "run with params, and return the comparison target.")
 
 
 def _run_fastvideo_pipeline(model_path: Path, params: dict[str, Any]) -> Any:
@@ -146,8 +142,6 @@ def test_todo_model_family_pipeline_official_parity() -> None:
     assert official_tensor.shape == fastvideo_tensor.shape
 
     diff = (official_tensor - fastvideo_tensor).abs()
-    print(
-        f"diff max={diff.max().item():.6f} "
-        f"mean={diff.mean().item():.6f} median={diff.median().item():.6f}"
-    )
+    print(f"diff max={diff.max().item():.6f} "
+          f"mean={diff.mean().item():.6f} median={diff.median().item():.6f}")
     assert_close(fastvideo_tensor, official_tensor, atol=1e-2, rtol=1e-2)

.buildkite/pipeline.yml

@@ -1,6 +1,8 @@
 env:
   IMAGE_VERSION: "py3.12-latest"
   BUILDKITE_CLEAN_CHECKOUT: true
+  # Buildkite only launches Modal; remote jobs initialize their own submodules.
+  BUILDKITE_GIT_SUBMODULES: false
 
 notify:
   - github_commit_status:
@@ -66,6 +68,17 @@ steps:
             limit: 2
       agents:
         queue: "default"
+    - label: ":vertical_traffic_light: Golden-Gate Tests"
+      if: build.env("TEST_SCOPE") == "direct" && build.env("TEST_TYPE") == "golden_gate"
+      command: "timeout 90m .buildkite/scripts/pr_test.sh"
+      retry:
+        automatic:
+          - exit_status: 128
+            limit: 3
+          - exit_status: -1
+            limit: 2
+      agents:
+        queue: "default"
     - label: ":microscope: Unit Tests"
       if: build.env("TEST_SCOPE") == "direct" && build.env("TEST_TYPE") == "unit_test"
       command: "timeout 90m .buildkite/scripts/pr_test.sh"
@@ -402,7 +415,7 @@ steps:
                 - "pyproject.toml"
                 - "docker/Dockerfile"
               config:
-                command: "timeout 15m .buildkite/scripts/pr_test.sh"
+                command: "timeout 25m .buildkite/scripts/pr_test.sh"
                 label: ":test_tube: Training Tests"
                 env:
                   - TEST_TYPE=training
@@ -413,7 +426,7 @@ steps:
                 - "pyproject.toml"
                 - "docker/Dockerfile"
               config:
-                command: "timeout 15m .buildkite/scripts/pr_test.sh"
+                command: "timeout 25m .buildkite/scripts/pr_test.sh"
                 label: ":test_tube: Distillation DMD Tests"
                 env:
                   - TEST_TYPE=distillation_dmd

.buildkite/scripts/pr_test.sh

@@ -187,6 +187,10 @@ case "$TEST_TYPE" in
         log "Running transformer tests..."
         MODAL_COMMAND="$MODAL_ENV HF_API_KEY=$HF_API_KEY python3 -m modal run $MODAL_TEST_FILE::run_transformer_tests"
         ;;
+    "golden_gate")
+        log "Running golden-gate tests..."
+        MODAL_COMMAND="$MODAL_ENV HF_API_KEY=$HF_API_KEY python3 -m modal run $MODAL_TEST_FILE::run_golden_gate_tests"
+        ;;
     "ssim")
         log "Running SSIM tests..."
         SSIM_BOOTSTRAP_ARGS=$(ssim_bootstrap_args)

.github/workflows/ci-precommit.yml

@@ -27,14 +27,25 @@ jobs:
         ref: ${{ inputs.ref || '' }}
     # For PR events, lint the PR head — but keep the hook definitions from
     # the base branch so an untrusted PR cannot alter what gets executed.
-    - name: Save trusted hook config
+    # The gate scripts are saved too: the self-test step below executes them,
+    # so it must run the base-branch copies, not the PR head's.
+    - name: Save trusted hook config and gate scripts
       if: github.event_name == 'pull_request_target'
-      run: cp .pre-commit-config.yaml "$RUNNER_TEMP/trusted-pre-commit-config.yaml"
-    - uses: actions/checkout@v4
+      run: |
+        cp .pre-commit-config.yaml "$RUNNER_TEMP/trusted-pre-commit-config.yaml"
+        cp -a .github/scripts "$RUNNER_TEMP/trusted-scripts"
+        echo "GATE_SCRIPTS_DIR=$RUNNER_TEMP/trusted-scripts" >> "$GITHUB_ENV"
+    # allow-unsafe-pr-checkout acknowledges checkout's pull_request_target
+    # guard: the head is data for the trusted hooks to lint; nothing from it
+    # is executed (config and gate scripts are pinned to the base branch
+    # above) and credentials are not persisted. SHA-pinned to v4.4.0 because
+    # actionlint's action schema does not know the new input yet.
+    - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
       if: github.event_name == 'pull_request_target'
       with:
         ref: ${{ github.event.pull_request.head.sha }}
         persist-credentials: false
+        allow-unsafe-pr-checkout: true
     - name: Restore trusted hook config
       if: github.event_name == 'pull_request_target'
       run: cp "$RUNNER_TEMP/trusted-pre-commit-config.yaml" .pre-commit-config.yaml
@@ -48,5 +59,7 @@ jobs:
       with:
         extra_args: --all-files --hook-stage manual
     # After pre-commit so a self-test failure cannot mask lint failures.
+    # GATE_SCRIPTS_DIR points at the base-branch copy on fork PRs (set above);
+    # push / workflow_call runs use the checked-out tree directly.
     - name: Full-suite gate self-test
-      run: bash .github/scripts/test_gate_full_suite.sh
+      run: bash "${GATE_SCRIPTS_DIR:-.github/scripts}/test_gate_full_suite.sh"

.github/workflows/ci-slash-commands.yml

@@ -129,7 +129,7 @@ jobs:
           set -euo pipefail
           TEST_NAME=$(echo "$COMMENT" | grep -oP '(?<=/test\s)\S+' | head -1 || true)
 
-          VALID="encoder vae transformer kernel unit dreamverse ssim training lora-inference lora-training lora-extraction distillation self-forcing vsa vmoba performance api train-framework eval full fastcheck pre-commit"
+          VALID="encoder vae transformer kernel unit dreamverse ssim golden-gate training lora-inference lora-training lora-extraction distillation self-forcing vsa vmoba performance api train-framework eval full fastcheck pre-commit"
           if [ -z "$TEST_NAME" ] || ! echo "$VALID" | grep -qw "$TEST_NAME"; then
             echo "Unknown test: '$TEST_NAME'. Valid: $VALID"
             exit 1
@@ -138,7 +138,7 @@ jobs:
           declare -A MAP=(
             [encoder]=encoder [vae]=vae [transformer]=transformer
             [kernel]=kernel_tests [unit]=unit_test [dreamverse]=dreamverse_app
-            [ssim]=ssim [training]=training
+            [ssim]=ssim [golden-gate]=golden_gate [training]=training
             [lora-inference]=inference_lora [lora-training]=training_lora
             [lora-extraction]=lora_extraction
             [distillation]=distillation_dmd [self-forcing]=self_forcing

.github/workflows/infra-build-image.yml

@@ -13,16 +13,23 @@ on:
         required: false
         default: false
         type: boolean
-  # Auto-rebuild the CUDA images when their Dockerfile changes on main. The CUDA
-  # matrix is the only lane that builds from docker/Dockerfile, so a path-scoped
-  # push trigger is a sufficient change detector on its own -- no separate
-  # detect-changes/paths-filter job is needed now that there is a single
-  # in-scope Dockerfile. Dreamverse (apps/dreamverse/docker/Dockerfile) and the
-  # rocm Dockerfile stay manual-dispatch only.
+  # Auto-rebuild the CUDA images when a repository-controlled image input
+  # changes on main. This includes the trusted SM89 kernel artifact's source,
+  # metadata/key helper, ABI dependency metadata, and build orchestration.
+  # Dreamverse (apps/dreamverse/docker/Dockerfile) and the ROCm Dockerfile stay
+  # manual-dispatch only.
   push:
     branches: [main]
     paths:
+      - '.dockerignore'
+      - '.github/workflows/_template-build-image.yml'
+      - '.github/workflows/infra-build-image.yml'
+      - '.gitmodules'
       - 'docker/Dockerfile'
+      - 'docker/uv-excludes'
+      - 'fastvideo-kernel/**'
+      - 'fastvideo/tests/modal/kernel_build_cache.py'
+      - 'pyproject.toml'
 
 
 permissions:
@@ -50,7 +57,7 @@ jobs:
   # 2.8.3 comes from the architecture-specific prebuilt releases.
   build-cuda-images:
     # Runs on a manual dispatch when build_cuda_matrix is set, or automatically
-    # on a push that changed docker/Dockerfile (inputs are null on push). The
+    # on an in-scope main push (inputs are null on push). The
     # repository guard keeps fork syncs from auto-building; manual dispatch
     # still works in forks.
     if: ${{ (github.event_name == 'push' && github.repository == 'hao-ai-lab/FastVideo') || github.event.inputs.build_cuda_matrix == 'true' }}

.github/workflows/infra-docs.yml

@@ -11,9 +11,7 @@ on:
       - 'requirements-mkdocs.txt'
       - 'scripts/check_docs_links.py'
       - '.github/workflows/infra-docs.yml'
-  # Run the trusted base-branch workflow so fork PRs can be skipped without
-  # waiting for maintainer approval.
-  pull_request_target:
+  pull_request:
     branches: [ main ]
     paths:
       - 'docs/**'
@@ -26,19 +24,21 @@ on:
 
 permissions:
   contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
 
 jobs:
   build:
-    # MkDocs executes repository code; only trusted same-repository PRs run it.
-    if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name == github.repository
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
           fetch-depth: 0
-          persist-credentials: false
 
       - name: Setup Python
         uses: actions/setup-python@v5
@@ -52,7 +52,6 @@ jobs:
         run: uv pip install --system -r requirements-mkdocs.txt
 
       - name: Setup Pages
-        if: github.event_name == 'push'
         uses: actions/configure-pages@v4
 
       - name: Build documentation
@@ -62,22 +61,17 @@ jobs:
         run: python scripts/check_docs_links.py
 
       - name: Upload artifact
-        if: github.event_name == 'push'
         uses: actions/upload-pages-artifact@v3
         with:
           path: ./site
 
   deploy:
-    permissions:
-      pages: write
-      id-token: write
-    concurrency: pages
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
     runs-on: ubuntu-latest
     needs: build
-    if: github.event_name == 'push'
+    if: github.ref == 'refs/heads/main'
     steps:
       - name: Deploy to GitHub Pages
         id: deployment

.gitignore

@@ -6,6 +6,7 @@ results/
 wandb/
 *.ipynb
 *.jpg
+!examples/datasets/lingbotworld2/image.jpg
 *.safetensors
 *.mp4
 *.png
@@ -34,6 +35,7 @@ env
 *.log
 weights/
 logs/
+/Z-Image/
 official_weights/
 converted_weights/
 
@@ -73,6 +75,7 @@ docs/distillation/examples/
 *.pkl
 
 # Reference videos (negations must come after the catch-all on line below)
+!fastvideo/tests/nightly/reference_video_*.mp4
 
 # Static images
 !docs/assets/images/**/*.png

.pre-commit-config.yaml

@@ -22,6 +22,7 @@ repos:
   hooks:
   - id: yapf
     args: [--in-place, --verbose]
+    language_version: python3.12
     additional_dependencies: [toml] # TODO: Remove when yapf is upgraded
 - repo: https://github.com/astral-sh/ruff-pre-commit
   rev: v0.11.12

HANDOFF-h3-dmd2-vsa.md

@@ -0,0 +1,88 @@
+# Handoff: VSA-H3 DMD2 overfit — run directly on tray 1795370
+
+State as of 2026-08-09. Everything is staged on the tray; only the launch is
+left (my login-node srun path was blocked by per-user thread exhaustion —
+running inside the tray's container sidesteps it entirely).
+
+## The experiment
+
+Single-sample DMD2 overfit on `c17_v2` (your prompt-rewrite v2 generation,
+1344×768 / 5.2 s / with audio), parity-first: **student on the VSA-H3 backend
+at sparsity 0.0** (parity-proven ≤2e-4 vs dense in unit tests) vs **teacher +
+critic on FLASH_ATTN with FA4**. 3-step schedule `[1000, 757, 522]`,
+`generator_update_interval: 5` (TTUR: critic every step, student every 5th),
+4 GPUs, sp=4, pure-FSDP sharding (hsdp 1×4), all three models
+gradient-checkpointed, batch 1, 2000 steps, ckpt+validation every 250.
+
+## What is already staged
+
+- **Code**: `/mnt/fv-h3ssim` on branch `h3-dmd2-vsa` (= `feat/h3-dmd2-vsa`
+  @ d81f1f166 = DMD2-for-H3 + PR #1695 VSA backend + per-role backend wiring
+  + wandb credential guard). Also pushed to origin as `feat/h3-dmd2-vsa`.
+- **Data**: `/mnt/h3-dmd2-overfit/data/data_00000.parquet` — one preprocessed
+  t2va record (video+audio VAE latents + text embedding 225×5120).
+- **Validation prompts**: `/mnt/h3-dmd2-overfit/c17_validation.json` (the c17
+  v2 prompt, 3-step sampling) — the YAML may still point at the Wan
+  placeholder; step 2 below fixes it idempotently.
+- **Config**: `examples/train/configs/distribution_matching/minimax_h3/dmd2_vsa0_overfit.yaml`
+- Raw inputs (for reference): `/mnt/h3-dmd2-overfit/c17_v2.mp4`, `c17_v2_prompt.txt`.
+
+## Run it (on the tray)
+
+```bash
+# 0. enter the persistent container (created by my earlier runs)
+docker exec -it fv-dev-1795370-0 bash
+# (if it's gone: ~/docker.sh style run with /home/scratch.willlin_ent -> /mnt)
+
+# 1. clean any leftover trainer from my attempts + confirm GPUs are free
+ps -eo pid,args | grep entrypoint.train | grep -v grep   # kill any PIDs listed
+nvidia-smi --query-gpu=memory.used --format=csv,noheader  # expect ~0 MiB x4
+
+# 2. env + config fix (idempotent)
+cd /mnt/fv-h3ssim
+export PYTHONPATH=/mnt/studio8/pyoverride   # routes 'import fastvideo' to THIS checkout
+export FASTVIDEO_FA4=1                      # teacher/critic FLASH_ATTN -> FA4 path
+export WANDB_API_KEY=8d9f4b39abd68eb4e29f6fc010b7ee71a2207cde
+sed -i "s|dataset_file: examples/training/finetune/Wan2.1-Fun-1.3B-InP/crush_smol/validation.json|dataset_file: /mnt/h3-dmd2-overfit/c17_validation.json|" \
+  examples/train/configs/distribution_matching/minimax_h3/dmd2_vsa0_overfit.yaml
+
+# 3. launch (interactive; or wrap in setsid nohup ... & for detach)
+torchrun --nproc_per_node 4 -m fastvideo.train.entrypoint.train \
+  --config examples/train/configs/distribution_matching/minimax_h3/dmd2_vsa0_overfit.yaml \
+  2>&1 | tee /mnt/h3-dmd2-overfit/logs/train.log
+```
+
+wandb: project `h3-dmd2-vsa`, run `dmd2_vsa0_overfit` — the URL prints within
+the first seconds of trainer init (`https://wandb.ai/...`). Logged per step:
+total/generator/fake-score loss, update_student flag, step_time_sec,
+vsa_sparsity.
+
+## What to expect / what parity means
+
+- Trio load: ~3×(33B DiT) FSDP-sharded + text encoder; first load on this
+  tray is warm for the text encoder (preprocess touched it) but cold for the
+  3 transformer copies — expect ~10-20 min before step 1.
+- Healthy signals: both losses finite from step 1; fake-score loss drops
+  fast (critic fitting one sample); generator loss moves every 5th step.
+- Parity claim to check: with sparsity 0.0 the student's VSA-H3 path should
+  train indistinguishably from a dense student (the sparsity-0 mask selects
+  every tile; kernel parity ≤2e-4). If it diverges/NaNs where a dense run
+  wouldn't, that's a VSA-H3-under-autograd bug — grab
+  `/mnt/h3-dmd2-overfit/logs/train.log` and the wandb run.
+- Next knob after parity holds: `training.vsa.sparsity` (e.g. 0.5 → 0.875
+  → 0.9) in the YAML — student-only; teacher/critic stay dense by
+  construction (`models.*.attention_backend`).
+
+## Known traps (all pre-paid)
+
+- `PYTHONPATH=/mnt/studio8/pyoverride` is mandatory — without it,
+  `import fastvideo` resolves to `/mnt/FastVideo` (the maintainer's checkout)
+  via the venv's editable-install finders, and cwd `/mnt/FastVideo` shadows too.
+- Don't set `FASTVIDEO_ATTENTION_BACKEND` globally — per-role backends come
+  from the YAML (`models.student/teacher/critic.attention_backend`).
+- The tile-buffer autograd fix is in this branch (grad paths get fresh
+  buffers); if you see "modified by an inplace operation" at backward, you're
+  on a stale checkout — `git -C /mnt/fv-h3ssim log --oneline -1` should show
+  d81f1f16.
+- Checkpoints land in `outputs/minimax_h3_dmd2_vsa0_overfit/` under the
+  checkout (NFS); validation videos under the same tree per callback config.

HANDOFF-slurm-32xgb200.md

@@ -0,0 +1,120 @@
+# Handoff: MiniMax-H3 data-free DMD2 on 8x 4xGB200 (Slurm)
+
+State as of 2026-08-11 on branch `feat/h3-dmd2-vsa`. Everything needed for
+the 32-GPU run is committed; what remains is cluster-side: fill in the
+`CLUSTER:` knobs in the sbatch, swap in the real dataset, and submit.
+
+## What this run is
+
+Data-free DMD2 distillation (`rollout_mode: simulate` — the student builds
+its own trajectory from pure noise through `[1000, 757, 522]`; no video/audio
+latents consumed, text conditioning only) of the 33B dual-modality H3 DiT.
+All three roles (student/teacher/critic) on dense FLASH_ATTN with FA4.
+**Global batch 64** = 8 data-parallel groups (one per tray) x
+`gradient_accumulation_steps: 8`.
+
+- Config: `examples/train/configs/distribution_matching/minimax_h3/dmd2_simulate_fa4_32gpu.yaml`
+- Launcher: `examples/train/slurm/dmd2_32xgb200.sbatch`
+- Docs: `examples/train/configs/distribution_matching/minimax_h3/README.md`
+
+## Everything below is already validated on a single 4xGB200 node
+
+- The exact simulate recipe trained stably (wandb `h3-dmd2-vsa/z2z91ruf`):
+  TTUR cadence correct, generator loss settles into the expected adversarial
+  0.2–1.0 band, no NaN/OOM. ~10 s/it critic steps, ~20 s/it generator steps
+  (every 5th) at 1344x768x124f, sp=4.
+- Effective-batch-2 via gradient accumulation over two distinct videos
+  (wandb `58dr571y`, 1800+ steps): both modalities' losses decline
+  monotonically (video 0.128->0.092, audio 0.179->0.053 by step 1000).
+  Accumulation is the batching mechanism — H3's packed pipeline is batch-1
+  per forward by design (variable caption lengths cannot stack).
+- Memory: three 33B roles fit at sp=4 / HSDP shard=4 with full gradient
+  checkpointing and `betas: [0.0, 0.999]` (buffer-free AdamW). Do NOT try
+  sp=2 or fewer than 4 GPUs per model replica: the backward working set
+  alone OOMs 184 GiB cards (measured 178 GiB before optimizer states exist).
+- Triton VSA kernel backward fix, bf16 autocast boundaries, validation
+  offload fix, sigma-exact validation — all on the branch (see git log).
+
+## Cluster pre-flight
+
+1. **Code**: checkout `feat/h3-dmd2-vsa` on the shared FS; venv with the
+   repo's CUDA install. `run.sh` sets PYTHONPATH to the repo root and cd's
+   into it — on trays that carry `/mnt/studio8/pyoverride`, make sure it is
+   NOT in PYTHONPATH or `import fastvideo` resolves to the wrong checkout.
+2. **Weights**: `/mnt/models/MiniMax-H3` must be visible from compute nodes
+   (all three roles `init_from` it).
+3. **Data**: the config ships pointing at the 2-row smoke-test set
+   (`/mnt/h3-dmd2-overfit/data_bs2`) — fine for the first submission, swap
+   `training.data.data_path` (and the validation `dataset_file`) for the
+   real preprocessed t2va parquet dir before a production run. Simulate mode
+   only reads text conditioning from the rows.
+4. **sbatch knobs**: partition/account (marked `CLUSTER:`), and if trays
+   require containers, wrap the srun payload (pyxis
+   `--container-image/--container-mounts=/mnt:/mnt,/dev/shm`) — hooks are
+   marked in the script.
+5. **W&B**: `~/.netrc` on a home visible from compute nodes, or export
+   `WANDB_MODE=offline` at submit time.
+6. **Login-node limits**: a previous srun attempt died to per-user thread
+   exhaustion on the login node — submit with `sbatch` (batch daemon runs
+   the script on the first compute node), don't launch interactive `srun`
+   pipelines from the login shell.
+
+## Launch
+
+```bash
+sbatch examples/train/slurm/dmd2_32xgb200.sbatch                 # 8 trays / 32 GPUs
+sbatch --nodes=2 examples/train/slurm/dmd2_32xgb200.sbatch       # scaled smoke test
+CONFIG=<other.yaml> sbatch examples/train/slurm/dmd2_32xgb200.sbatch
+```
+
+The script derives world size / rendezvous / `hsdp_replicate_dim` from the
+actual allocation, so a smaller `--nodes` shrinks the DP width (and global
+batch) consistently. Recommended sequence: `--nodes=1` (reproduces the
+validated local run), then `--nodes=2`, then the full 8.
+
+## What to expect
+
+- **First boot per node**: ~10-13 min per 33B role from cold NFS (~35 min
+  worst case for the trio, plus text encoder/VAEs) — then each node writes
+  its weight cache to `/dev/shm/fastvideo-wcache`
+  (`FASTVIDEO_WEIGHT_SHARD_CACHE_PER_NODE=1` is set by the sbatch so every
+  tray caches, not just tray 0). **Relaunches: ~2-4 s per role.** Note
+  `/dev/shm` may be purged by node-local cleaners — a purged cache degrades
+  to a full load and rewrites itself, never fails the run.
+- **Step time**: per-tray compute is identical to the validated 4-GPU run;
+  with accum 8, expect roughly 8 x (10 s + 2 s amortized generator surcharge)
+  ≈ 90-100 s per optimizer step, ~4000 steps ≈ 4.5 days. Cut
+  `max_train_steps` or validation frequency to taste.
+- **Logs**: one dir per node under `examples/train/logs/<jobid>-node<k>/`;
+  wandb project `h3-dmd2-vsa`, run `dmd2_simulate_fa4_32gpu` (rank 0 only).
+- **Checkpointing** is ON every 500 steps (DCP; large — ~120 GiB+ per save
+  for two trainable roles). Point `output_dir` somewhere with headroom or
+  set `training_state_checkpointing_steps: 0` to disable.
+- **Validation** every 250 steps samples every prompt in the validation
+  json at the training sigmas; with the smoke-test json that is 2 videos,
+  ~3 min.
+
+## Known traps (all pre-paid on the branch)
+
+- Don't set `FASTVIDEO_ATTENTION_BACKEND` globally — per-role backends come
+  from the YAML.
+- `FASTVIDEO_FA4=1` is required (sbatch sets it); without it FLASH_ATTN
+  falls back to a slower path.
+- `PYTORCH_CUDA_ALLOC_CONF=expandable_segments:True` is required (sbatch
+  sets it); without it fragmentation OOMs appear after a few steps.
+- If a VSA student is used later (`attention_backend: VIDEO_SPARSE_ATTN_H3`
+  + `training.vsa.sparsity`): the Triton backward bugfix is on this branch —
+  do not run VSA training from an older checkout. Sparsity ~0.9+ matches
+  dense wall-clock in training and ~2x in validation sampling; the win is
+  inference-side.
+- NCCL fabric env (IB HCA / socket ifname) is cluster-specific — hook in the
+  sbatch.
+
+## If something breaks
+
+Grab the failing node's `examples/train/logs/<jobid>-node<k>/` log and the
+wandb run. The historically likely failure classes and their signatures:
+OOM ledger lines (memory — check betas are [0.0, 0.999] and grad ckpt full),
+`attempting to assign a gradient with device type` (a module was CPU-offloaded
+mid-training — should be fixed, see validation.py), rendezvous timeout at
+boot (MASTER_ADDR/port reachability between trays).

README.md

@@ -9,7 +9,7 @@
 **FastVideo is a unified post-training and real-time inference framework for accelerated video generation.**
 
 ## NEWS
-- `2026/06/23`: Release FastWan-QAD: 5s of Video generated in 1.8s E2E. [FastWan-QAD models](https://huggingface.co/FastVideo/FastWan-QAD-FP8-1.3B), check out the [Blog](https://haoailab.com/blogs/fastwan-qad/).
+- `2026/06/23`: Release FastWan-QAD: 5s of Video generated in 1.8s E2E. See the [FastWan-QAD models](https://huggingface.co/FastVideo/FastWan-QAD-FP8-1.3B), [Attn-QAT training guide](https://haoailab.com/FastVideo/training/attn_qat/), and [blog](https://haoailab.com/blogs/fastwan-qad/).
 - `2026/03/17`: Release demo: Into the Dreamverse: Vibe Directing in FastVideo, check out the [Blog](https://haoailab.com/blogs/dreamverse/).
 - `2026/03/13`: Release demo: Create a 5s 1080p Video in 4.5s with FastVideo on a Single GPU, check out the [Blog](https://haoailab.com/blogs/fastvideo_realtime_1080p/).
 - `2025/11/19`: Release [CausalWan2.2 I2V A14B Preview](https://huggingface.co/FastVideo/CausalWan2.2-I2V-A14B-Preview-Diffusers) models, [Blog](https://hao-ai-lab.github.io/blogs/fastvideo_causalwan_preview/) and [Inference Code!](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_self_forcing_causal_wan2_2_i2v.py).
@@ -33,7 +33,7 @@ FastVideo has the following features:
   - [Sparse distillation](https://hao-ai-lab.github.io/blogs/fastvideo_post_training/) to achieve >50x denoising speedup
   - Scalable training with FSDP2, sequence parallelism, and selective activation checkpointing.
   - Causal distillation through Self-Forcing
-  - See this [page](https://hao-ai-lab.github.io/FastVideo/training/overview/) for full list of supported models and recipes.
+  - See this [page](https://hao-ai-lab.github.io/FastVideo/training/overview/) for the supported training workflows, and the [support matrix](https://hao-ai-lab.github.io/FastVideo/inference/support_matrix/) for supported models.
 - State-of-the-art performance optimizations for inference
   - Sequence Parallelism for distributed inference
   - Multiple state-of-the-art attention backends

apps/dreamverse/dreamverse/tests/conftest.py

@@ -3,7 +3,6 @@ from __future__ import annotations
 import sys
 from pathlib import Path
 
-
 TESTS_DIR = Path(__file__).resolve().parent
 DREAMVERSE_PACKAGE_DIR = TESTS_DIR.parent
 DREAMVERSE_APP_DIR = DREAMVERSE_PACKAGE_DIR.parent

apps/dreamverse/dreamverse/tests/test_config.py

@@ -5,7 +5,6 @@ from pathlib import Path
 
 import pytest
 
-
 SERVER_DIR = Path(__file__).resolve().parents[1]
 
 
@@ -53,9 +52,7 @@ def test_config_defaults_to_cerebras_with_parallel_groq_fallback_stage(monkeypat
     module = _load_config_module()
 
     assert module.PROMPT_PROVIDER == "cerebras"
-    assert module.PROMPT_PROVIDER_RUNTIME_STAGES == (
-        ("cerebras", "groq"),
-    )
+    assert module.PROMPT_PROVIDER_RUNTIME_STAGES == (("cerebras", "groq"), )
     assert module.PROMPT_PROVIDER_PRIORITY == (
         "cerebras",
         "groq",
@@ -86,9 +83,7 @@ def test_config_ignores_legacy_groq_primary_override(monkeypatch):
     module = _load_config_module()
 
     assert module.PROMPT_PROVIDER == "cerebras"
-    assert module.PROMPT_PROVIDER_RUNTIME_STAGES == (
-        ("cerebras", "groq"),
-    )
+    assert module.PROMPT_PROVIDER_RUNTIME_STAGES == (("cerebras", "groq"), )
     assert module.PROMPT_PROVIDER_PRIORITY == (
         "cerebras",
         "groq",
@@ -106,24 +101,17 @@ def test_config_uses_local_overlay_paths_when_devtools_enabled(monkeypatch, tmp_
 
     assert module.DEVTOOLS_ENABLED is True
     assert module.FRONTEND_ROOT.as_posix().endswith("apps/dreamverse/web")
-    assert module.PROMPT_ENHANCE_SYSTEM_PROMPT_PATH.endswith(
-        "dreamverse/prompts.local/next_segment_system_prompt.md"
-    )
+    assert module.PROMPT_ENHANCE_SYSTEM_PROMPT_PATH.endswith("dreamverse/prompts.local/next_segment_system_prompt.md")
     assert module.PROMPT_ENHANCE_SYSTEM_PROMPT_FALLBACK_PATH.endswith(
-        "dreamverse/prompts/next_segment_system_prompt.md"
-    )
+        "dreamverse/prompts/next_segment_system_prompt.md")
     assert module.PROMPT_REWRITE_USER_SYSTEM_PROMPT_PATH.endswith(
-        "dreamverse/prompts.local/rewrite_user_system_prompt.md"
-    )
+        "dreamverse/prompts.local/rewrite_user_system_prompt.md")
     assert module.PROMPT_REWRITE_USER_SYSTEM_PROMPT_FALLBACK_PATH.endswith(
-        "dreamverse/prompts/rewrite_user_system_prompt.md"
-    )
+        "dreamverse/prompts/rewrite_user_system_prompt.md")
     assert module.CURATED_PRESETS_FILE_PATH.endswith(
-        "apps/dreamverse/web/prompts.local/selected_ltx2_continuation_story_presets.json"
-    )
+        "apps/dreamverse/web/prompts.local/selected_ltx2_continuation_story_presets.json")
     assert module.CURATED_PRESETS_FALLBACK_FILE_PATH.endswith(
-        "apps/dreamverse/web/prompts/selected_ltx2_continuation_story_presets.json"
-    )
+        "apps/dreamverse/web/prompts/selected_ltx2_continuation_story_presets.json")
     assert module.FRONTEND_STATIC_DIR_CANDIDATES[:2] == (
         str(module.FRONTEND_ROOT / "out"),
         str(module.FRONTEND_ROOT / "dist"),

apps/dreamverse/dreamverse/tests/test_entrypoints.py

@@ -9,6 +9,7 @@ from fastapi.testclient import TestClient
 import fastvideo.entrypoints.streaming as streaming_entrypoints
 import pytest
 
+
 def _install_stack03_import_stubs(monkeypatch):
     """Keep entrypoint tests focused while later-stack runtime modules are absent."""
     if not hasattr(streaming_entrypoints, "build_health_router"):
@@ -17,6 +18,7 @@ def _install_stack03_import_stubs(monkeypatch):
     gpu_pool_stub = types.ModuleType("dreamverse.gpu_pool")
 
     class GPUPool:
+
         def __init__(self, _gpu_ids):
             pass
 
@@ -49,6 +51,7 @@ def _install_stack03_import_stubs(monkeypatch):
     controller_stub = types.ModuleType("dreamverse.session.controller")
 
     class SessionController:
+
         def __init__(self, **_kwargs):
             pass
 
@@ -76,13 +79,11 @@ def _run_cli(module, monkeypatch, argv: list[str]) -> list[dict[str, object]]:
     uvicorn_stub = types.ModuleType("uvicorn")
 
     def run(app, host: str, port: int) -> None:
-        calls.append(
-            {
-                "app": app,
-                "host": host,
-                "port": port,
-            }
-        )
+        calls.append({
+            "app": app,
+            "host": host,
+            "port": port,
+        })
 
     uvicorn_stub.run = run
     monkeypatch.setitem(sys.modules, "uvicorn", uvicorn_stub)
@@ -99,13 +100,11 @@ def test_server_cli_defaults_to_local_web_port(monkeypatch):
     server_main = _import_server_main(monkeypatch)
     calls = _run_cli(server_main, monkeypatch, ["dreamverse-server"])
 
-    assert calls == [
-        {
-            "app": server_main.app,
-            "host": "0.0.0.0",
-            "port": 8009,
-        }
-    ]
+    assert calls == [{
+        "app": server_main.app,
+        "host": "0.0.0.0",
+        "port": 8009,
+    }]
 
 
 def test_server_cli_allows_explicit_host_and_port(monkeypatch):
@@ -116,13 +115,11 @@ def test_server_cli_allows_explicit_host_and_port(monkeypatch):
         ["dreamverse-server", "--host", "127.0.0.1", "--port", "8123"],
     )
 
-    assert calls == [
-        {
-            "app": server_main.app,
-            "host": "127.0.0.1",
-            "port": 8123,
-        }
-    ]
+    assert calls == [{
+        "app": server_main.app,
+        "host": "127.0.0.1",
+        "port": 8123,
+    }]
 
 
 def test_server_does_not_expose_backend_source_as_static_assets(monkeypatch):
@@ -142,13 +139,11 @@ def test_mock_server_cli_defaults_to_local_web_port(monkeypatch):
         ["dreamverse-mock-server"],
     )
 
-    assert calls == [
-        {
-            "app": mock_server.app,
-            "host": "0.0.0.0",
-            "port": 8009,
-        }
-    ]
+    assert calls == [{
+        "app": mock_server.app,
+        "host": "0.0.0.0",
+        "port": 8009,
+    }]
 
 
 def test_mock_server_cli_updates_latency(monkeypatch):
@@ -161,13 +156,11 @@ def test_mock_server_cli_updates_latency(monkeypatch):
             ["dreamverse-mock-server", "--latency", "321", "--port", "8111"],
         )
 
-        assert calls == [
-            {
-                "app": mock_server.app,
-                "host": "0.0.0.0",
-                "port": 8111,
-            }
-        ]
+        assert calls == [{
+            "app": mock_server.app,
+            "host": "0.0.0.0",
+            "port": 8111,
+        }]
         assert mock_server.LATENCY_MS == 321
     finally:
         mock_server.LATENCY_MS = old_latency_ms

apps/dreamverse/dreamverse/tests/test_gpu_pool.py

@@ -7,7 +7,6 @@ from types import SimpleNamespace
 
 import pytest
 
-
 import dreamverse.gpu_pool as gpu_pool
 
 
@@ -85,9 +84,7 @@ def test_send_command_raises_on_worker_death():
     cmd_q = ctx.Queue()
     resp_q = ctx.Queue()
 
-    proc = ctx.Process(
-        target=_child_consume_and_exit, args=(cmd_q, resp_q)
-    )
+    proc = ctx.Process(target=_child_consume_and_exit, args=(cmd_q, resp_q))
     proc.start()
 
     # Wait for the spawn child to fully boot.  Allow generous time —

apps/dreamverse/dreamverse/tests/test_import_contract.py

@@ -7,7 +7,7 @@ ALLOWED_PREFIXES = (
     "fastvideo.entrypoints.video_generator",
     "fastvideo.configs",
 )
-ALLOWED_EXACT = ("fastvideo",)
+ALLOWED_EXACT = ("fastvideo", )
 FORBIDDEN_PREFIXES = (
     "fastvideo.pipelines",
     "fastvideo.models",
@@ -38,19 +38,13 @@ def test_dreamverse_server_imports_only_public_fastvideo_surfaces() -> None:
         except SyntaxError as task_exc:
             raise AssertionError(f"Failed to parse {path}") from task_exc
         for node in ast.walk(tree):
-            names = (
-                [a.name for a in node.names] if isinstance(node, ast.Import)
-                else [node.module] if isinstance(node, ast.ImportFrom) and node.module
-                else []
-            )
+            names = ([a.name for a in node.names] if isinstance(node, ast.Import) else
+                     [node.module] if isinstance(node, ast.ImportFrom) and node.module else [])
             for name in names:
                 if not name:
                     continue
                 rel_path = str(path.relative_to(root))
-                if (
-                    name.startswith(FORBIDDEN_PREFIXES)
-                    and (rel_path, name) not in ALLOWED_INTERNAL_IMPORTS
-                ):
+                if (name.startswith(FORBIDDEN_PREFIXES) and (rel_path, name) not in ALLOWED_INTERNAL_IMPORTS):
                     bad.append((str(path.relative_to(root)), getattr(node, "lineno", 0), name))
 
     assert bad == [], f"Forbidden internal imports: {bad}"

apps/dreamverse/dreamverse/tests/test_mock_server.py

@@ -6,7 +6,6 @@ import os
 
 from fastapi import WebSocketDisconnect
 
-
 os.environ.setdefault("CEREBRAS_API_KEY", "dummy")
 os.environ.setdefault("GROQ_API_KEY", "dummy")
 
@@ -14,6 +13,7 @@ import dreamverse.mock_server as mock_server
 
 
 class _FakeWebSocket:
+
     def __init__(self, messages: list[tuple[float, dict[str, object]]]):
         self._messages = messages
         self._index = 0
@@ -49,34 +49,34 @@ def test_mock_server_matches_current_single5s_protocol():
         mock_server.MOCK_SEGMENT_BYTES = b"mock-fmp4-bytes"
         mock_server.LATENCY_MS = 1
 
-        ws = _FakeWebSocket(
-            [
-                (
-                    0.0,
-                    {
-                        "type": "session_init_v2",
-                        "preset_id": "simple_prompt_1",
-                        "curated_prompts": ["selected prompt"],
-                        "single_clip_mode": True,
-                        "enhancement_enabled": False,
-                        "auto_extension_enabled": False,
-                        "loop_generation_enabled": False,
-                    },
-                ),
-                (
-                    0.01,
-                    {
-                        "type": "simple_generate",
-                        "preset_id": "simple_custom_prompt",
-                        "prompt_id": "simple_custom_prompt",
-                        "prompt": "custom prompt",
-                        "enhancement_enabled": True,
-                        "initial_image": None,
-                    },
-                ),
-                (0.20, {"type": "leave"}),
-            ]
-        )
+        ws = _FakeWebSocket([
+            (
+                0.0,
+                {
+                    "type": "session_init_v2",
+                    "preset_id": "simple_prompt_1",
+                    "curated_prompts": ["selected prompt"],
+                    "single_clip_mode": True,
+                    "enhancement_enabled": False,
+                    "auto_extension_enabled": False,
+                    "loop_generation_enabled": False,
+                },
+            ),
+            (
+                0.01,
+                {
+                    "type": "simple_generate",
+                    "preset_id": "simple_custom_prompt",
+                    "prompt_id": "simple_custom_prompt",
+                    "prompt": "custom prompt",
+                    "enhancement_enabled": True,
+                    "initial_image": None,
+                },
+            ),
+            (0.20, {
+                "type": "leave"
+            }),
+        ])
 
         asyncio.run(mock_server.websocket_endpoint(ws))
 
@@ -92,24 +92,14 @@ def test_mock_server_matches_current_single5s_protocol():
         assert message_types.count("ltx2_stream_complete") == 2
         assert "prompt_sources_blocked" not in message_types
 
-        segment_start_events = [
-            payload
-            for payload in ws.sent_json
-            if payload["type"] == "ltx2_segment_start"
-        ]
-        gpu_assigned_event = next(
-            payload for payload in ws.sent_json if payload["type"] == "gpu_assigned"
-        )
+        segment_start_events = [payload for payload in ws.sent_json if payload["type"] == "ltx2_segment_start"]
+        gpu_assigned_event = next(payload for payload in ws.sent_json if payload["type"] == "gpu_assigned")
         assert gpu_assigned_event["session_timeout"] == mock_server.SESSION_TIMEOUT_SECONDS
         assert [payload["segment_idx"] for payload in segment_start_events] == [1, 1]
         assert segment_start_events[0]["prompt"] == "selected prompt"
         assert segment_start_events[1]["prompt"] == "custom prompt"
 
-        step_complete_events = [
-            payload
-            for payload in ws.sent_json
-            if payload["type"] == "step_complete"
-        ]
+        step_complete_events = [payload for payload in ws.sent_json if payload["type"] == "step_complete"]
         assert len(step_complete_events) == 2
         assert step_complete_events[0]["latency_ms"] == {
             "total": 121.0,
@@ -134,29 +124,29 @@ def test_mock_server_regular_cap_waits_for_rewrite_rollout():
         mock_server.LATENCY_MS = 1
         mock_server.GENERATION_SEGMENT_CAP = 1
 
-        ws = _FakeWebSocket(
-            [
-                (
-                    0.0,
-                    {
-                        "type": "session_init_v2",
-                        "preset_id": "test_preset",
-                        "curated_prompts": ["segment one"],
-                        "enhancement_enabled": True,
-                        "auto_extension_enabled": False,
-                        "loop_generation_enabled": False,
-                    },
-                ),
-                (
-                    0.02,
-                    {
-                        "type": "rewrite_seed_prompts",
-                        "rewrite_instruction": "start a new rollout",
-                    },
-                ),
-                (0.20, {"type": "leave"}),
-            ]
-        )
+        ws = _FakeWebSocket([
+            (
+                0.0,
+                {
+                    "type": "session_init_v2",
+                    "preset_id": "test_preset",
+                    "curated_prompts": ["segment one"],
+                    "enhancement_enabled": True,
+                    "auto_extension_enabled": False,
+                    "loop_generation_enabled": False,
+                },
+            ),
+            (
+                0.02,
+                {
+                    "type": "rewrite_seed_prompts",
+                    "rewrite_instruction": "start a new rollout",
+                },
+            ),
+            (0.20, {
+                "type": "leave"
+            }),
+        ])
 
         asyncio.run(mock_server.websocket_endpoint(ws))
 
@@ -166,11 +156,7 @@ def test_mock_server_regular_cap_waits_for_rewrite_rollout():
         assert "generation_cap_reached" not in message_types
         assert "prompt_sources_blocked" not in message_types
 
-        segment_start_events = [
-            payload
-            for payload in ws.sent_json
-            if payload["type"] == "ltx2_segment_start"
-        ]
+        segment_start_events = [payload for payload in ws.sent_json if payload["type"] == "ltx2_segment_start"]
         assert [payload["segment_idx"] for payload in segment_start_events] == [1, 1]
         assert segment_start_events[0]["prompt"] == "segment one"
         assert segment_start_events[1]["prompt"] == "segment one [start a new rollout]"
@@ -187,54 +173,40 @@ def test_mock_server_rewrite_during_active_segment_restarts_from_first_rewritten
         mock_server.MOCK_SEGMENT_BYTES = b"mock-fmp4-bytes"
         mock_server.LATENCY_MS = 100
 
-        ws = _FakeWebSocket(
-            [
-                (
-                    0.0,
-                    {
-                        "type": "session_init_v2",
-                        "preset_id": "test_preset",
-                        "curated_prompts": ["segment one", "segment two"],
-                        "enhancement_enabled": True,
-                        "auto_extension_enabled": False,
-                        "loop_generation_enabled": False,
-                    },
-                ),
-                (
-                    0.02,
-                    {
-                        "type": "rewrite_seed_prompts",
-                        "rewrite_instruction": "restart from rewrite",
-                    },
-                ),
-                (0.40, {"type": "leave"}),
-            ]
-        )
+        ws = _FakeWebSocket([
+            (
+                0.0,
+                {
+                    "type": "session_init_v2",
+                    "preset_id": "test_preset",
+                    "curated_prompts": ["segment one", "segment two"],
+                    "enhancement_enabled": True,
+                    "auto_extension_enabled": False,
+                    "loop_generation_enabled": False,
+                },
+            ),
+            (
+                0.02,
+                {
+                    "type": "rewrite_seed_prompts",
+                    "rewrite_instruction": "restart from rewrite",
+                },
+            ),
+            (0.40, {
+                "type": "leave"
+            }),
+        ])
 
         asyncio.run(mock_server.websocket_endpoint(ws))
 
-        segment_start_events = [
-            payload
-            for payload in ws.sent_json
-            if payload["type"] == "ltx2_segment_start"
-        ]
+        segment_start_events = [payload for payload in ws.sent_json if payload["type"] == "ltx2_segment_start"]
         assert [payload["prompt"] for payload in segment_start_events[:2]] == [
             "segment one",
             "segment one [restart from rewrite]",
         ]
-        assert all(
-            payload["prompt"] != "segment two"
-            for payload in segment_start_events[1:]
-        )
-        reset_events = [
-            payload
-            for payload in ws.sent_json
-            if payload.get("type") == "seed_prompts_reset_applied"
-        ]
-        assert any(
-            payload.get("reason") == "rewrite_during_generation"
-            for payload in reset_events
-        )
+        assert all(payload["prompt"] != "segment two" for payload in segment_start_events[1:])
+        reset_events = [payload for payload in ws.sent_json if payload.get("type") == "seed_prompts_reset_applied"]
+        assert any(payload.get("reason") == "rewrite_during_generation" for payload in reset_events)
     finally:
         mock_server.MOCK_SEGMENT_BYTES = old_segment_bytes
         mock_server.LATENCY_MS = old_latency_ms
@@ -247,24 +219,24 @@ def test_mock_server_supports_initial_custom_rollout_prompt():
         mock_server.MOCK_SEGMENT_BYTES = b"mock-fmp4-bytes"
         mock_server.LATENCY_MS = 1
 
-        ws = _FakeWebSocket(
-            [
-                (
-                    0.0,
-                    {
-                        "type": "session_init_v2",
-                        "preset_id": "custom_editable",
-                        "preset_label": "Custom rollout",
-                        "curated_prompts": [],
-                        "initial_rollout_prompt": "A moonbase corridor thriller with flooding",
-                        "enhancement_enabled": True,
-                        "auto_extension_enabled": False,
-                        "loop_generation_enabled": False,
-                    },
-                ),
-                (0.20, {"type": "leave"}),
-            ]
-        )
+        ws = _FakeWebSocket([
+            (
+                0.0,
+                {
+                    "type": "session_init_v2",
+                    "preset_id": "custom_editable",
+                    "preset_label": "Custom rollout",
+                    "curated_prompts": [],
+                    "initial_rollout_prompt": "A moonbase corridor thriller with flooding",
+                    "enhancement_enabled": True,
+                    "auto_extension_enabled": False,
+                    "loop_generation_enabled": False,
+                },
+            ),
+            (0.20, {
+                "type": "leave"
+            }),
+        ])
 
         asyncio.run(mock_server.websocket_endpoint(ws))
 
@@ -276,15 +248,9 @@ def test_mock_server_supports_initial_custom_rollout_prompt():
         assert "ltx2_stream_start" in message_types
         assert "prompt_sources_blocked" not in message_types
 
-        segment_start_events = [
-            payload
-            for payload in ws.sent_json
-            if payload["type"] == "ltx2_segment_start"
-        ]
+        segment_start_events = [payload for payload in ws.sent_json if payload["type"] == "ltx2_segment_start"]
         assert segment_start_events
-        assert segment_start_events[0]["prompt"] == (
-            "A moonbase corridor thriller with flooding [segment 1]"
-        )
+        assert segment_start_events[0]["prompt"] == ("A moonbase corridor thriller with flooding [segment 1]")
     finally:
         mock_server.MOCK_SEGMENT_BYTES = old_segment_bytes
         mock_server.LATENCY_MS = old_latency_ms
@@ -297,35 +263,37 @@ def test_mock_server_can_start_new_project_without_reconnecting():
         mock_server.MOCK_SEGMENT_BYTES = b"mock-fmp4-bytes"
         mock_server.LATENCY_MS = 40
 
-        ws = _FakeWebSocket(
-            [
-                (
-                    0.0,
-                    {
-                        "type": "session_init_v2",
-                        "preset_id": "test_preset",
-                        "curated_prompts": ["segment one"],
-                        "enhancement_enabled": True,
-                        "auto_extension_enabled": False,
-                        "loop_generation_enabled": False,
-                    },
-                ),
-                (0.02, {"type": "end_project_keep_session"}),
-                (
-                    0.20,
-                    {
-                        "type": "project_init_v1",
-                        "preset_id": "test_preset_2",
-                        "preset_label": "Test Preset 2",
-                        "curated_prompts": ["segment two"],
-                        "enhancement_enabled": True,
-                        "auto_extension_enabled": False,
-                        "loop_generation_enabled": False,
-                    },
-                ),
-                (0.40, {"type": "leave"}),
-            ]
-        )
+        ws = _FakeWebSocket([
+            (
+                0.0,
+                {
+                    "type": "session_init_v2",
+                    "preset_id": "test_preset",
+                    "curated_prompts": ["segment one"],
+                    "enhancement_enabled": True,
+                    "auto_extension_enabled": False,
+                    "loop_generation_enabled": False,
+                },
+            ),
+            (0.02, {
+                "type": "end_project_keep_session"
+            }),
+            (
+                0.20,
+                {
+                    "type": "project_init_v1",
+                    "preset_id": "test_preset_2",
+                    "preset_label": "Test Preset 2",
+                    "curated_prompts": ["segment two"],
+                    "enhancement_enabled": True,
+                    "auto_extension_enabled": False,
+                    "loop_generation_enabled": False,
+                },
+            ),
+            (0.40, {
+                "type": "leave"
+            }),
+        ])
 
         asyncio.run(mock_server.websocket_endpoint(ws))
 
@@ -336,16 +304,11 @@ def test_mock_server_can_start_new_project_without_reconnecting():
 
         project_idle_index = message_types.index("project_idle")
         stream_start_indexes = [
-            index for index, message_type in enumerate(message_types)
-            if message_type == "ltx2_stream_start"
+            index for index, message_type in enumerate(message_types) if message_type == "ltx2_stream_start"
         ]
         assert stream_start_indexes[0] < project_idle_index < stream_start_indexes[1]
 
-        segment_start_events = [
-            payload
-            for payload in ws.sent_json
-            if payload["type"] == "ltx2_segment_start"
-        ]
+        segment_start_events = [payload for payload in ws.sent_json if payload["type"] == "ltx2_segment_start"]
         assert [payload["prompt"] for payload in segment_start_events[:2]] == [
             "segment one",
             "segment two",

apps/dreamverse/dreamverse/tests/test_prompt_enhancer.py

@@ -6,7 +6,6 @@ import os
 import re
 import time
 
-
 os.environ.setdefault("CEREBRAS_API_KEY", "dummy")
 os.environ.setdefault("GROQ_API_KEY", "dummy")
 
@@ -22,6 +21,7 @@ from dreamverse.prompt_enhancer import (
 
 
 class _FakeResponse:
+
     def __init__(self, payload: dict):
         self._payload = payload
 
@@ -30,6 +30,7 @@ class _FakeResponse:
 
 
 class _FakeSyncCompletions:
+
     def __init__(self, payload: dict):
         self._payload = payload
 
@@ -38,6 +39,7 @@ class _FakeSyncCompletions:
 
 
 class _FakeSyncClient:
+
     def __init__(self, payload: dict):
         self.chat = type(
             "_FakeChat",
@@ -47,6 +49,7 @@ class _FakeSyncClient:
 
 
 class _DelayedSyncCompletions:
+
     def __init__(self, payload: dict, delay_s: float = 0.0, exc: Exception | None = None):
         self._payload = payload
         self._delay_s = delay_s
@@ -61,29 +64,26 @@ class _DelayedSyncCompletions:
 
 
 class _DelayedSyncClient:
+
     def __init__(self, payload: dict, delay_s: float = 0.0, exc: Exception | None = None):
         self.chat = type(
             "_FakeChat",
             (),
-            {
-                "completions": _DelayedSyncCompletions(
-                    payload,
-                    delay_s=delay_s,
-                    exc=exc,
-                )
-            },
+            {"completions": _DelayedSyncCompletions(
+                payload,
+                delay_s=delay_s,
+                exc=exc,
+            )},
         )()
 
 
 def _chat_payload_with_content(content: str) -> dict:
     return {
-        "choices": [
-            {
-                "message": {
-                    "content": content,
-                }
+        "choices": [{
+            "message": {
+                "content": content,
             }
-        ]
+        }]
     }
 
 
@@ -172,6 +172,7 @@ def _build_staged_enhancer(
 
 
 class _FakeOpenAIClient:
+
     def __init__(self, **kwargs):
         self.kwargs = kwargs
         self.chat = type(
@@ -182,6 +183,7 @@ class _FakeOpenAIClient:
 
 
 class _FakeCerebrasClient:
+
     def __init__(self, **kwargs):
         self.kwargs = kwargs
         self.chat = type(
@@ -192,16 +194,12 @@ class _FakeCerebrasClient:
 
 
 def test_parse_json_response_accepts_fenced_json_with_prose():
-    parsed = _parse_json_response(
-        "Here is the rewrite:\n```json\n{\"segment_prompts\":[\"A\",\"B\"]}\n```\nThanks."
-    )
+    parsed = _parse_json_response("Here is the rewrite:\n```json\n{\"segment_prompts\":[\"A\",\"B\"]}\n```\nThanks.")
     assert parsed == {"segment_prompts": ["A", "B"]}
 
 
 def test_parse_json_response_extracts_first_embedded_object():
-    parsed = _parse_json_response(
-        "Model output:\n{\"segment_prompts\":[\"A\",\"B\"]}\n(complete)"
-    )
+    parsed = _parse_json_response("Model output:\n{\"segment_prompts\":[\"A\",\"B\"]}\n(complete)")
     assert parsed == {"segment_prompts": ["A", "B"]}
 
 
@@ -268,16 +266,12 @@ def test_build_client_supports_groq_provider(monkeypatch):
 
 def test_rewrite_prompt_sequence_accepts_segment_prompts_output():
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'))
     result = asyncio.run(
         enhancer.rewrite_prompt_sequence(
             ["prompt one", "prompt two"],
             rewrite_instruction="make it cinematic",
-        )
-    )
+        ))
     assert result.fallback_used is False
     assert result.error is None
     assert result.rollout_id == "preset_a"
@@ -286,15 +280,12 @@ def test_rewrite_prompt_sequence_accepts_segment_prompts_output():
 
 
 def test_rewrite_prompt_sequence_accepts_legacy_rewritten_prompts_output():
-    enhancer = _build_test_enhancer(
-        _chat_payload_with_content('{"rewritten_prompts":["A","B"]}')
-    )
+    enhancer = _build_test_enhancer(_chat_payload_with_content('{"rewritten_prompts":["A","B"]}'))
     result = asyncio.run(
         enhancer.rewrite_prompt_sequence(
             ["prompt one", "prompt two"],
             rewrite_instruction="make it cinematic",
-        )
-    )
+        ))
     assert result.fallback_used is False
     assert result.error is None
     assert result.rollout_id == "current_rollout"
@@ -303,19 +294,14 @@ def test_rewrite_prompt_sequence_accepts_legacy_rewritten_prompts_output():
 
 
 def test_rewrite_prompt_sequence_accepts_segment_dicts_without_top_level_rollout_metadata():
-    enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"segments":[{"prompt":"A"},{"text":"B"}]}'
-        )
-    )
+    enhancer = _build_test_enhancer(_chat_payload_with_content('{"segments":[{"prompt":"A"},{"text":"B"}]}'))
     result = asyncio.run(
         enhancer.rewrite_prompt_sequence(
             ["prompt one", "prompt two"],
             preset_id="preset_a",
             preset_label="Preset A",
             rewrite_instruction="make it cinematic",
-        )
-    )
+        ))
     assert result.fallback_used is False
     assert result.error is None
     assert result.rollout_id == "preset_a"
@@ -329,14 +315,12 @@ def test_rewrite_prompt_sequence_accepts_numbered_prose_output():
             "The user is asking for a cinematic rewrite.\n\n"
             "1. A dog bounds across the moon's dusty surface, kicking up silver regolith as it chases a rabbit beneath the black sky.\n"
             "2. The rabbit darts around a crater rim while the dog lunges after it, Earth glowing blue in the distance.\n"
-        )
-    )
+        ))
     result = asyncio.run(
         enhancer.rewrite_prompt_sequence(
             ["prompt one", "prompt two"],
             rewrite_instruction="make it cinematic",
-        )
-    )
+        ))
     assert result.fallback_used is False
     assert result.error is None
     assert result.rollout_id == "current_rollout"
@@ -355,12 +339,10 @@ def test_enhance_prompt_prefers_cerebras_before_groq_fallback():
         groq_delay_s=0.01,
     )
 
-    result = asyncio.run(
-        enhancer.enhance_prompt(
-            "A rainy alley at night",
-            mode="single_clip",
-        )
-    )
+    result = asyncio.run(enhancer.enhance_prompt(
+        "A rainy alley at night",
+        mode="single_clip",
+    ))
 
     assert result.fallback_used is False
     assert result.error is None
@@ -381,12 +363,10 @@ def test_enhance_prompt_uses_groq_when_cerebras_fails():
         groq_delay_s=0.01,
     )
 
-    result = asyncio.run(
-        enhancer.enhance_prompt(
-            "A rainy alley at night",
-            mode="single_clip",
-        )
-    )
+    result = asyncio.run(enhancer.enhance_prompt(
+        "A rainy alley at night",
+        mode="single_clip",
+    ))
 
     assert result.fallback_used is False
     assert result.error is None
@@ -408,13 +388,11 @@ def test_enhance_prompt_can_use_groq_when_cerebras_times_out():
     enhancer.http_timeout_ms = 50
     enhancer.default_timeout_ms = 50
 
-    result = asyncio.run(
-        enhancer.enhance_prompt(
-            "A rainy alley at night",
-            mode="single_clip",
-            timeout_ms=50,
-        )
-    )
+    result = asyncio.run(enhancer.enhance_prompt(
+        "A rainy alley at night",
+        mode="single_clip",
+        timeout_ms=50,
+    ))
 
     assert result.fallback_used is False
     assert result.error is None
@@ -434,12 +412,10 @@ def test_enhance_prompt_can_use_cerebras_when_it_returns_first():
         groq_delay_s=0.08,
     )
 
-    result = asyncio.run(
-        enhancer.enhance_prompt(
-            "A rainy alley at night",
-            mode="single_clip",
-        )
-    )
+    result = asyncio.run(enhancer.enhance_prompt(
+        "A rainy alley at night",
+        mode="single_clip",
+    ))
 
     assert result.fallback_used is False
     assert result.error is None
@@ -453,15 +429,12 @@ def test_enhance_prompt_can_use_cerebras_when_it_returns_first():
 
 
 def test_rewrite_prompt_sequence_keeps_raw_output_on_parse_error():
-    enhancer = _build_test_enhancer(
-        _chat_payload_with_content("I cannot comply with JSON right now.")
-    )
+    enhancer = _build_test_enhancer(_chat_payload_with_content("I cannot comply with JSON right now."))
     result = asyncio.run(
         enhancer.rewrite_prompt_sequence(
             ["prompt one", "prompt two"],
             rewrite_instruction="make it cinematic",
-        )
-    )
+        ))
     assert result.fallback_used is True
     assert "No JSON object found in assistant response." in (result.error or "")
     assert result.raw_response_text == "I cannot comply with JSON right now."
@@ -473,9 +446,7 @@ def test_rewrite_prompt_sequence_keeps_raw_output_on_parse_error():
 def test_rewrite_prompt_sequence_uses_current_rollout_payload_shape():
     enhancer = _build_test_enhancer(
         _chat_payload_with_content(
-            '{"id":"rewritten_rollout","label":"Rewritten Rollout","segment_prompts":["A","B"]}'
-        )
-    )
+            '{"id":"rewritten_rollout","label":"Rewritten Rollout","segment_prompts":["A","B"]}'))
     captured = {
         "body": None,
         "timeout_seconds": None,
@@ -486,8 +457,7 @@ def test_rewrite_prompt_sequence_uses_current_rollout_payload_shape():
         captured["timeout_seconds"] = timeout_seconds
         return (
             _chat_payload_with_content(
-                '{"id":"rewritten_rollout","label":"Rewritten Rollout","segment_prompts":["A","B"]}'
-            ),
+                '{"id":"rewritten_rollout","label":"Rewritten Rollout","segment_prompts":["A","B"]}'),
             '{"id":"rewritten_rollout","label":"Rewritten Rollout","segment_prompts":["A","B"]}',
         )
 
@@ -502,8 +472,7 @@ def test_rewrite_prompt_sequence_uses_current_rollout_payload_shape():
             rewrite_model="gpt-test",
             rewrite_temperature=0.2,
             timeout_ms=800,
-        )
-    )
+        ))
 
     assert result.fallback_used is False
     assert captured["body"]["messages"][0] == {
@@ -512,12 +481,12 @@ def test_rewrite_prompt_sequence_uses_current_rollout_payload_shape():
     }
     assert captured["body"]["messages"][1]["role"] == "user"
     assert prompt_enhancer_module.json.loads(captured["body"]["messages"][1]["content"]) == {
-        "mode": "edit_existing_rollout",
-        "request": (
-            "Rewrite all segment prompts with improved continuity and cinematic detail. "
-            "Keep count and ordering identical."
-        ),
-        "user_instruction": "make it cinematic",
+        "mode":
+        "edit_existing_rollout",
+        "request": ("Rewrite all segment prompts with improved continuity and cinematic detail. "
+                    "Keep count and ordering identical."),
+        "user_instruction":
+        "make it cinematic",
         "current_rollout": {
             "id": "preset_a",
             "label": "Preset A",
@@ -528,11 +497,8 @@ def test_rewrite_prompt_sequence_uses_current_rollout_payload_shape():
 
 def test_rewrite_prompt_sequence_supports_new_rollout_mode():
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"custom_editable","label":"Custom rollout","segment_prompts":['
-            '"A","B","C","D","E","F"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"custom_editable","label":"Custom rollout","segment_prompts":['
+                                   '"A","B","C","D","E","F"]}'))
     captured = {
         "body": None,
     }
@@ -541,10 +507,8 @@ def test_rewrite_prompt_sequence_supports_new_rollout_mode():
         del timeout_seconds
         captured["body"] = body
         return (
-            _chat_payload_with_content(
-                '{"id":"custom_editable","label":"Custom rollout","segment_prompts":['
-                '"A","B","C","D","E","F"]}'
-            ),
+            _chat_payload_with_content('{"id":"custom_editable","label":"Custom rollout","segment_prompts":['
+                                       '"A","B","C","D","E","F"]}'),
             '{"id":"custom_editable","label":"Custom rollout","segment_prompts":['
             '"A","B","C","D","E","F"]}',
         )
@@ -560,30 +524,29 @@ def test_rewrite_prompt_sequence_supports_new_rollout_mode():
             rewrite_model="gpt-test",
             rewrite_temperature=0.2,
             timeout_ms=800,
-        )
-    )
+        ))
 
     assert result.fallback_used is False
     assert result.prompts == ["A", "B", "C", "D", "E", "F"]
     assert prompt_enhancer_module.json.loads(captured["body"]["messages"][1]["content"]) == {
-        "mode": "new_rollout",
-        "request": (
-            "Rewrite all segment prompts with improved continuity and cinematic detail. "
-            "Keep count and ordering identical."
-        ),
-        "user_instruction": "A moonbase corridor thriller with flooding and red alarms",
-        "desired_segment_count": 6,
-        "rollout_id_hint": "custom_editable",
-        "rollout_label_hint": "Custom rollout",
+        "mode":
+        "new_rollout",
+        "request": ("Rewrite all segment prompts with improved continuity and cinematic detail. "
+                    "Keep count and ordering identical."),
+        "user_instruction":
+        "A moonbase corridor thriller with flooding and red alarms",
+        "desired_segment_count":
+        6,
+        "rollout_id_hint":
+        "custom_editable",
+        "rollout_label_hint":
+        "Custom rollout",
     }
 
 
 def test_rewrite_prompt_sequence_uses_session_override_system_prompt():
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'))
     enhancer.rewrite_all_system_prompt = "shared system prompt"
     captured = {
         "body": None,
@@ -593,9 +556,7 @@ def test_rewrite_prompt_sequence_uses_session_override_system_prompt():
         del timeout_seconds
         captured["body"] = body
         return (
-            _chat_payload_with_content(
-                '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-            ),
+            _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'),
             '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}',
         )
 
@@ -609,8 +570,7 @@ def test_rewrite_prompt_sequence_uses_session_override_system_prompt():
             rewrite_instruction="make it cinematic",
             rewrite_model="gpt-test",
             system_prompt_override="session specific system prompt",
-        )
-    )
+        ))
 
     assert result.fallback_used is False
     assert captured["body"]["messages"][0] == {
@@ -621,10 +581,7 @@ def test_rewrite_prompt_sequence_uses_session_override_system_prompt():
 
 def test_resolve_rewrite_new_rollout_system_prompt_uses_dedicated_prompt():
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'))
     enhancer.rewrite_all_system_prompt = "shared rewrite system prompt"
     enhancer.rewrite_user_system_prompt = "new rollout rewrite system prompt"
 
@@ -635,24 +592,17 @@ def test_resolve_rewrite_new_rollout_system_prompt_uses_dedicated_prompt():
 
 def test_resolve_rewrite_new_rollout_system_prompt_prefers_override():
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'))
     enhancer.rewrite_all_system_prompt = "shared rewrite system prompt"
     enhancer.rewrite_user_system_prompt = "new rollout rewrite system prompt"
 
-    resolved = enhancer.resolve_rewrite_new_rollout_system_prompt(
-        "session specific system prompt"
-    )
+    resolved = enhancer.resolve_rewrite_new_rollout_system_prompt("session specific system prompt")
 
     assert resolved == "session specific system prompt"
 
 
 def test_generate_auto_prompt_uses_selected_model():
-    enhancer = _build_test_enhancer(
-        _chat_payload_with_content('{"next_prompt":"Auto next"}')
-    )
+    enhancer = _build_test_enhancer(_chat_payload_with_content('{"next_prompt":"Auto next"}'))
     enhancer.auto_system_prompt = "auto system prompt"
     enhancer.rewrite_model_options = ["gpt-test", "gpt-alt"]
     enhancer.rewrite_default_model = "gpt-test"
@@ -680,8 +630,7 @@ def test_generate_auto_prompt_uses_selected_model():
             next_segment_idx=2,
             model="gpt-alt",
             timeout_ms=800,
-        )
-    )
+        ))
     assert result.fallback_used is False
     assert result.error is None
     assert result.prompt == "Auto next"
@@ -690,9 +639,7 @@ def test_generate_auto_prompt_uses_selected_model():
 
 
 def test_enhance_prompt_uses_selected_model():
-    enhancer = _build_test_enhancer(
-        _chat_payload_with_content('{"next_prompt":"Enhanced next"}')
-    )
+    enhancer = _build_test_enhancer(_chat_payload_with_content('{"next_prompt":"Enhanced next"}'))
     enhancer.enhance_system_prompt = "enhance system prompt"
     enhancer.auto_system_prompt = "auto system prompt"
     enhancer.rewrite_model_options = ["gpt-test", "gpt-alt"]
@@ -722,8 +669,7 @@ def test_enhance_prompt_uses_selected_model():
             next_segment_idx=2,
             model="gpt-alt",
             timeout_ms=800,
-        )
-    )
+        ))
     assert result.fallback_used is False
     assert result.error is None
     assert result.prompt == "Enhanced next"
@@ -732,9 +678,7 @@ def test_enhance_prompt_uses_selected_model():
 
 
 def test_enhance_prompt_single_clip_uses_auto_extension_prompt_and_prompt_field():
-    enhancer = _build_test_enhancer(
-        _chat_payload_with_content('{"prompt":"Extended single clip"}')
-    )
+    enhancer = _build_test_enhancer(_chat_payload_with_content('{"prompt":"Extended single clip"}'))
     enhancer.enhance_system_prompt = "enhance system prompt"
     enhancer.auto_system_prompt = "auto system prompt"
     enhancer.rewrite_model_options = ["gpt-test", "gpt-alt"]
@@ -764,14 +708,12 @@ def test_enhance_prompt_single_clip_uses_auto_extension_prompt_and_prompt_field(
 
     enhancer._request_content = _fake_request_content  # type: ignore[attr-defined]
 
-    result = asyncio.run(
-        enhancer.enhance_prompt(
-            "short 5s idea",
-            mode="single_clip",
-            model="gpt-alt",
-            timeout_ms=800,
-        )
-    )
+    result = asyncio.run(enhancer.enhance_prompt(
+        "short 5s idea",
+        mode="single_clip",
+        model="gpt-alt",
+        timeout_ms=800,
+    ))
     assert result.fallback_used is False
     assert result.error is None
     assert result.prompt == "Extended single clip"
@@ -784,17 +726,15 @@ def test_enhance_prompt_single_clip_uses_auto_extension_prompt_and_prompt_field(
             "single 5-second LTX-2.3 video clip. Respond with "
             'valid JSON only as {"prompt": "..."}.'  # noqa: E501
         ),
-        "user_prompt": "short 5s idea",
+        "user_prompt":
+        "short 5s idea",
     }
 
 
 def test_enhance_prompt_single_clip_rejects_plain_text_response():
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            "Medium shot of a woman by a rainy cafe window as she lifts her "
-            "phone, exhales softly, and the camera makes a slow push in."
-        )
-    )
+        _chat_payload_with_content("Medium shot of a woman by a rainy cafe window as she lifts her "
+                                   "phone, exhales softly, and the camera makes a slow push in."))
     enhancer.auto_system_prompt = "auto system prompt"
 
     result = asyncio.run(
@@ -803,17 +743,14 @@ def test_enhance_prompt_single_clip_rejects_plain_text_response():
             mode="single_clip",
             model="gpt-test",
             timeout_ms=800,
-        )
-    )
+        ))
     assert result.fallback_used is True
     assert "No JSON object found in assistant response." in result.error
     assert result.prompt == ""
 
 
 def test_enhance_prompt_single_clip_rejects_segment_prompts_json():
-    enhancer = _build_test_enhancer(
-        _chat_payload_with_content('{"segment_prompts":["A","B"]}')
-    )
+    enhancer = _build_test_enhancer(_chat_payload_with_content('{"segment_prompts":["A","B"]}'))
     enhancer.auto_system_prompt = "auto system prompt"
     enhancer.rewrite_model_options = ["gpt-test"]
     enhancer.rewrite_default_model = "gpt-test"
@@ -824,17 +761,14 @@ def test_enhance_prompt_single_clip_rejects_segment_prompts_json():
             mode="single_clip",
             model="gpt-test",
             timeout_ms=800,
-        )
-    )
+        ))
     assert result.fallback_used is True
     assert result.prompt == ""
     assert "Missing prompt string." in (result.error or "")
 
 
 def test_enhance_prompt_requires_json_and_does_not_fallback_to_raw_text():
-    enhancer = _build_test_enhancer(
-        _chat_payload_with_content("A cinematic continuation with slow dolly movement.")
-    )
+    enhancer = _build_test_enhancer(_chat_payload_with_content("A cinematic continuation with slow dolly movement."))
     enhancer.enhance_system_prompt = "enhance system prompt"
     enhancer.rewrite_model_options = ["gpt-test"]
     enhancer.rewrite_default_model = "gpt-test"
@@ -846,17 +780,14 @@ def test_enhance_prompt_requires_json_and_does_not_fallback_to_raw_text():
             next_segment_idx=2,
             model="gpt-test",
             timeout_ms=800,
-        )
-    )
+        ))
     assert result.fallback_used is True
     assert result.prompt == ""
     assert "No JSON object found in assistant response." in (result.error or "")
 
 
 def test_generate_auto_prompt_requires_json_and_does_not_fallback_to_raw_text():
-    enhancer = _build_test_enhancer(
-        _chat_payload_with_content("A calm, grounded continuation with subtle motion.")
-    )
+    enhancer = _build_test_enhancer(_chat_payload_with_content("A calm, grounded continuation with subtle motion."))
     enhancer.auto_system_prompt = "auto system prompt"
     enhancer.rewrite_model_options = ["gpt-test"]
     enhancer.rewrite_default_model = "gpt-test"
@@ -867,34 +798,30 @@ def test_generate_auto_prompt_requires_json_and_does_not_fallback_to_raw_text():
             next_segment_idx=2,
             model="gpt-test",
             timeout_ms=800,
-        )
-    )
+        ))
     assert result.fallback_used is True
     assert result.prompt == ""
     assert "No JSON object found in assistant response." in (result.error or "")
 
 
 def test_rewrite_prompt_sequence_includes_raw_json_when_content_empty():
-    enhancer = _build_test_enhancer(
-        {
-            "choices": [
-                {
-                    "finish_reason": "length",
-                    "message": {
-                        "content": [],
-                        "refusal": None,
-                    },
-                }
-            ],
-            "usage": {"completion_tokens": 0},
-        }
-    )
+    enhancer = _build_test_enhancer({
+        "choices": [{
+            "finish_reason": "length",
+            "message": {
+                "content": [],
+                "refusal": None,
+            },
+        }],
+        "usage": {
+            "completion_tokens": 0
+        },
+    })
     result = asyncio.run(
         enhancer.rewrite_prompt_sequence(
             ["prompt one", "prompt two"],
             rewrite_instruction="make it cinematic",
-        )
-    )
+        ))
     assert result.fallback_used is True
     assert "No rewrite segment prompts found in assistant response." in (result.error or "")
     assert isinstance(result.raw_response_text, str)
@@ -903,10 +830,7 @@ def test_rewrite_prompt_sequence_includes_raw_json_when_content_empty():
 
 def test_get_rewrite_model_config_returns_fixed_defaults():
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'))
     enhancer.rewrite_default_model = "gpt-oss-120b"
     enhancer.rewrite_model_options = ["gpt-oss-120b"]
 
@@ -918,10 +842,7 @@ def test_get_rewrite_model_config_returns_fixed_defaults():
 
 def test_get_prompt_config_includes_auto_extension_prompt():
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'))
     enhancer.enhance_system_prompt_path = "/tmp/next.md"
     enhancer.auto_system_prompt_path = "/tmp/auto.md"
     enhancer.rewrite_all_system_prompt_path = "/tmp/rewrite.md"
@@ -948,19 +869,14 @@ def test_get_prompt_config_includes_auto_extension_prompt():
 
 def test_get_prompt_config_reports_loaded_fallback_prompt_path(tmp_path):
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'))
     rewrite_fallback_path = tmp_path / "rewrite_window_system_prompt.md"
     rewrite_fallback_path.write_text("rewrite prompt\n", encoding="utf-8")
     next_path = tmp_path / "next.md"
     next_path.write_text("next prompt\n", encoding="utf-8")
     auto_path = tmp_path / "auto.md"
     auto_path.write_text("auto prompt\n", encoding="utf-8")
-    enhancer.rewrite_all_system_prompt_path = str(
-        tmp_path / "prompts.local" / "rewrite_window_system_prompt.md"
-    )
+    enhancer.rewrite_all_system_prompt_path = str(tmp_path / "prompts.local" / "rewrite_window_system_prompt.md")
     enhancer.rewrite_all_system_prompt_fallback_path = str(rewrite_fallback_path)
     enhancer.enhance_system_prompt_path = str(next_path)
     enhancer.auto_system_prompt_path = str(auto_path)
@@ -973,14 +889,9 @@ def test_get_prompt_config_reports_loaded_fallback_prompt_path(tmp_path):
     assert config["rewrite_window_system_prompt_path"] == str(rewrite_fallback_path)
 
 
-def test_reload_system_prompts_falls_back_to_rewrite_window_when_user_prompt_empty(
-    tmp_path,
-):
+def test_reload_system_prompts_falls_back_to_rewrite_window_when_user_prompt_empty(tmp_path, ):
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'))
     next_path = tmp_path / "next.md"
     auto_path = tmp_path / "auto.md"
     rewrite_path = tmp_path / "rewrite_window_system_prompt.md"
@@ -1007,10 +918,7 @@ def test_reload_system_prompts_falls_back_to_rewrite_window_when_user_prompt_emp
 
 def test_save_prompt_config_updates_auto_extension_prompt(tmp_path):
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'))
     next_path = tmp_path / "next.md"
     auto_path = tmp_path / "auto.md"
     rewrite_path = tmp_path / "rewrite.md"
@@ -1021,9 +929,7 @@ def test_save_prompt_config_updates_auto_extension_prompt(tmp_path):
     enhancer.auto_system_prompt_path = str(auto_path)
     enhancer.rewrite_all_system_prompt_path = str(rewrite_path)
 
-    config = enhancer.save_prompt_config(
-        auto_extension_system_prompt="auto updated",
-    )
+    config = enhancer.save_prompt_config(auto_extension_system_prompt="auto updated", )
 
     assert auto_path.read_text(encoding="utf-8").strip() == "auto updated"
     assert config["auto_extension_system_prompt"] == "auto updated"
@@ -1031,10 +937,7 @@ def test_save_prompt_config_updates_auto_extension_prompt(tmp_path):
 
 def test_save_prompt_config_updates_rewrite_user_prompt(tmp_path):
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'))
     next_path = tmp_path / "next.md"
     auto_path = tmp_path / "auto.md"
     rewrite_path = tmp_path / "rewrite.md"
@@ -1052,9 +955,7 @@ def test_save_prompt_config_updates_rewrite_user_prompt(tmp_path):
     enhancer.rewrite_all_system_prompt_fallback_path = None
     enhancer.rewrite_user_system_prompt_fallback_path = None
 
-    config = enhancer.save_prompt_config(
-        rewrite_user_system_prompt="rewrite user updated",
-    )
+    config = enhancer.save_prompt_config(rewrite_user_system_prompt="rewrite user updated", )
 
     assert rewrite_user_path.read_text(encoding="utf-8").strip() == "rewrite user updated"
     assert config["rewrite_user_system_prompt"] == "rewrite user updated"
@@ -1062,10 +963,7 @@ def test_save_prompt_config_updates_rewrite_user_prompt(tmp_path):
 
 def test_save_prompt_config_updates_rewrite_model(tmp_path):
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'))
     next_path = tmp_path / "next.md"
     auto_path = tmp_path / "auto.md"
     rewrite_path = tmp_path / "rewrite.md"
@@ -1081,9 +979,7 @@ def test_save_prompt_config_updates_rewrite_model(tmp_path):
     enhancer.rewrite_default_model = "gpt-test"
     enhancer.rewrite_model_options = ["gpt-test", "gpt-alt"]
 
-    config = enhancer.save_prompt_config(
-        rewrite_model="gpt-alt",
-    )
+    config = enhancer.save_prompt_config(rewrite_model="gpt-alt", )
 
     assert enhancer.rewrite_default_model == "gpt-alt"
     assert config["rewrite_model"] == "gpt-alt"
@@ -1092,10 +988,7 @@ def test_save_prompt_config_updates_rewrite_model(tmp_path):
 
 def test_save_prompt_config_updates_rewrite_temperature(tmp_path):
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'))
     next_path = tmp_path / "next.md"
     auto_path = tmp_path / "auto.md"
     rewrite_path = tmp_path / "rewrite.md"
@@ -1109,9 +1002,7 @@ def test_save_prompt_config_updates_rewrite_temperature(tmp_path):
     enhancer.auto_system_prompt_fallback_path = None
     enhancer.rewrite_all_system_prompt_fallback_path = None
 
-    config = enhancer.save_prompt_config(
-        rewrite_temperature=1.3,
-    )
+    config = enhancer.save_prompt_config(rewrite_temperature=1.3, )
 
     assert enhancer.rewrite_default_temperature == 1.3
     assert config["rewrite_temperature"] == 1.3
@@ -1119,10 +1010,7 @@ def test_save_prompt_config_updates_rewrite_temperature(tmp_path):
 
 def test_save_prompt_config_creates_versioned_backup_for_existing_prompt(tmp_path):
     enhancer = _build_test_enhancer(
-        _chat_payload_with_content(
-            '{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'
-        )
-    )
+        _chat_payload_with_content('{"id":"preset_a","label":"Preset A","segment_prompts":["A","B"]}'))
     next_path = tmp_path / "next.md"
     auto_path = tmp_path / "auto.md"
     rewrite_path = tmp_path / "rewrite_window_system_prompt.md"
@@ -1136,13 +1024,9 @@ def test_save_prompt_config_creates_versioned_backup_for_existing_prompt(tmp_pat
     enhancer.auto_system_prompt_fallback_path = None
     enhancer.rewrite_all_system_prompt_fallback_path = None
 
-    enhancer.save_prompt_config(
-        rewrite_window_system_prompt="rewrite updated",
-    )
+    enhancer.save_prompt_config(rewrite_window_system_prompt="rewrite updated", )
 
-    backup_paths = sorted(
-        tmp_path.glob("rewrite_window_system_prompt.*.bak.md")
-    )
+    backup_paths = sorted(tmp_path.glob("rewrite_window_system_prompt.*.bak.md"))
 
     assert rewrite_path.read_text(encoding="utf-8").strip() == "rewrite updated"
     assert len(backup_paths) == 1

apps/dreamverse/dreamverse/tests/test_realtime_stress.py

@@ -27,13 +27,8 @@ try:
 except ModuleNotFoundError:
     websockets = None  # type: ignore[assignment]
 
-
-DEFAULT_PRESET_FILE = (
-    Path(__file__).resolve().parents[2]
-    / "web"
-    / "prompts"
-    / "selected_ltx2_continuation_story_presets.json"
-)
+DEFAULT_PRESET_FILE = (Path(__file__).resolve().parents[2] / "web" / "prompts" /
+                       "selected_ltx2_continuation_story_presets.json")
 
 
 def utc_now_iso() -> str:
@@ -65,10 +60,7 @@ def safe_percentile(values: list[float], percentile: float) -> float | None:
     if lower == upper:
         return sorted_values[lower]
     fraction = rank - lower
-    return (
-        sorted_values[lower]
-        + (sorted_values[upper] - sorted_values[lower]) * fraction
-    )
+    return (sorted_values[lower] + (sorted_values[upper] - sorted_values[lower]) * fraction)
 
 
 def summarize_series(values: list[float]) -> dict[str, float | int | None]:
@@ -145,24 +137,16 @@ def load_curated_prompts(
     selected_id = str(selected.get("id", "")).strip() or "unknown_preset"
     raw_prompts = selected.get("segment_prompts", [])
     if not isinstance(raw_prompts, list):
-        raise ValueError(
-            f"Preset {selected_id} has invalid segment_prompts (must be list)."
-        )
+        raise ValueError(f"Preset {selected_id} has invalid segment_prompts (must be list).")
 
-    prompts = [
-        str(prompt).strip()
-        for prompt in raw_prompts
-        if isinstance(prompt, str) and str(prompt).strip()
-    ]
+    prompts = [str(prompt).strip() for prompt in raw_prompts if isinstance(prompt, str) and str(prompt).strip()]
     if not prompts:
         raise ValueError(f"Preset {selected_id} has no non-empty prompts.")
 
     limited = prompts[:curated_limit]
     if not limited:
-        raise ValueError(
-            f"curated_limit={curated_limit} produced no prompts for preset "
-            f"{selected_id}."
-        )
+        raise ValueError(f"curated_limit={curated_limit} produced no prompts for preset "
+                         f"{selected_id}.")
     return selected_id, limited, len(prompts)
 
 
@@ -224,11 +208,11 @@ async def run_single_session(
 
     try:
         async with websockets.connect(
-            url,
-            max_size=None,
-            ping_interval=None,
-            open_timeout=connect_timeout_s,
-            close_timeout=2.0,
+                url,
+                max_size=None,
+                ping_interval=None,
+                open_timeout=connect_timeout_s,
+                close_timeout=2.0,
         ) as ws:
             connect_finish_monotonic = time.monotonic()
             session_data["connect_finish_ts_utc"] = utc_now_iso()
@@ -249,9 +233,7 @@ async def run_single_session(
                 timeout_remaining = session_timeout_s - elapsed_s
                 if timeout_remaining <= 0:
                     session_data["status"] = "timeout"
-                    session_data["error"] = (
-                        f"Session timed out after {session_timeout_s:.1f}s."
-                    )
+                    session_data["error"] = (f"Session timed out after {session_timeout_s:.1f}s.")
                     break
 
                 recv_start_epoch = time.time()
@@ -265,9 +247,7 @@ async def run_single_session(
                     )
                 except asyncio.TimeoutError:
                     session_data["status"] = "timeout"
-                    session_data["error"] = (
-                        "Timed out waiting for websocket message."
-                    )
+                    session_data["error"] = ("Timed out waiting for websocket message.")
                     break
                 except Exception as exc:
                     session_data["status"] = "failed"
@@ -288,20 +268,16 @@ async def run_single_session(
 
                     chunk_gap_ms: float | None = None
                     if last_chunk_finish_monotonic is not None:
-                        chunk_gap_ms = (
-                            recv_finish_monotonic - last_chunk_finish_monotonic
-                        ) * 1000.0
+                        chunk_gap_ms = (recv_finish_monotonic - last_chunk_finish_monotonic) * 1000.0
 
-                    session_data["chunks"].append(
-                        {
-                            "segment_idx": current_segment_idx,
-                            "chunk_idx": session_data["total_chunks"],
-                            "size_bytes": len(message),
-                            "chunk_start_ts_utc": recv_start_iso,
-                            "chunk_finish_ts_utc": recv_finish_iso,
-                            "chunk_gap_ms": chunk_gap_ms,
-                        }
-                    )
+                    session_data["chunks"].append({
+                        "segment_idx": current_segment_idx,
+                        "chunk_idx": session_data["total_chunks"],
+                        "size_bytes": len(message),
+                        "chunk_start_ts_utc": recv_start_iso,
+                        "chunk_finish_ts_utc": recv_finish_iso,
+                        "chunk_gap_ms": chunk_gap_ms,
+                    })
                     last_chunk_finish_monotonic = recv_finish_monotonic
                     last_chunk_finish_epoch = recv_finish_epoch
                     session_data["last_chunk_finish_ts_utc"] = recv_finish_iso
@@ -321,9 +297,7 @@ async def run_single_session(
                 if msg_type == "gpu_assigned":
                     session_data["gpu_assigned_ts_utc"] = recv_finish_iso
                     if connect_finish_monotonic is not None:
-                        session_data["queue_wait_ms"] = (
-                            recv_finish_monotonic - connect_finish_monotonic
-                        ) * 1000.0
+                        session_data["queue_wait_ms"] = (recv_finish_monotonic - connect_finish_monotonic) * 1000.0
                 elif msg_type == "ltx2_stream_start":
                     if initial_total_segments is None:
                         parsed_total = parse_int(data.get("total_segments"))
@@ -338,20 +312,13 @@ async def run_single_session(
                     session_data["media_segments_completed"] += 1
                     if first_media_segment_complete_epoch is None:
                         first_media_segment_complete_epoch = recv_finish_epoch
-                        session_data[
-                            "first_media_segment_complete_ts_utc"
-                        ] = recv_finish_iso
+                        session_data["first_media_segment_complete_ts_utc"] = recv_finish_iso
                 elif msg_type == "ltx2_segment_complete":
                     session_data["segments_completed"] += 1
                     seg_idx = parse_int(data.get("segment_idx"))
-                    if (
-                        initial_total_segments is not None
-                        and seg_idx is not None
-                        and seg_idx >= initial_total_segments
-                    ):
-                        session_data[
-                            "target_segment_complete_ts_utc"
-                        ] = recv_finish_iso
+                    if (initial_total_segments is not None and seg_idx is not None
+                            and seg_idx >= initial_total_segments):
+                        session_data["target_segment_complete_ts_utc"] = recv_finish_iso
                         await asyncio.sleep(post_complete_wait_s)
                         session_data["leave_sent_ts_utc"] = utc_now_iso()
                         try:
@@ -362,15 +329,11 @@ async def run_single_session(
                         break
                 elif msg_type == "session_timeout":
                     session_data["status"] = "timeout"
-                    session_data["error"] = str(
-                        data.get("message") or "Backend session timeout"
-                    )
+                    session_data["error"] = str(data.get("message") or "Backend session timeout")
                     break
                 elif msg_type == "error":
                     session_data["status"] = "failed"
-                    session_data["error"] = str(
-                        data.get("message") or "Backend error message"
-                    )
+                    session_data["error"] = str(data.get("message") or "Backend error message")
                     break
 
             if session_data["status"] == "failed" and session_data["error"] is None:
@@ -379,29 +342,18 @@ async def run_single_session(
         session_data["status"] = "failed"
         session_data["error"] = f"WebSocket connect/run failed: {exc}"
 
-    if (
-        first_chunk_finish_epoch is not None
-        and last_chunk_finish_epoch is not None
-        and session_data["total_chunk_bytes"] > 0
-    ):
+    if (first_chunk_finish_epoch is not None and last_chunk_finish_epoch is not None
+            and session_data["total_chunk_bytes"] > 0):
         duration_s = last_chunk_finish_epoch - first_chunk_finish_epoch
         if duration_s > 0:
-            session_data["session_goodput_mbps"] = (
-                session_data["total_chunk_bytes"] * 8.0 / duration_s / 1_000_000.0
-            )
+            session_data["session_goodput_mbps"] = (session_data["total_chunk_bytes"] * 8.0 / duration_s / 1_000_000.0)
 
-    if (
-        first_chunk_finish_epoch is not None
-        and first_media_segment_complete_epoch is not None
-    ):
-        session_data["first_chunk_before_first_media_complete"] = (
-            first_chunk_finish_epoch < first_media_segment_complete_epoch
-        )
+    if (first_chunk_finish_epoch is not None and first_media_segment_complete_epoch is not None):
+        session_data["first_chunk_before_first_media_complete"] = (first_chunk_finish_epoch
+                                                                   < first_media_segment_complete_epoch)
 
     session_data["close_ts_utc"] = utc_now_iso()
-    session_data["duration_ms"] = (
-        time.monotonic() - session_start_monotonic
-    ) * 1000.0
+    session_data["duration_ms"] = (time.monotonic() - session_start_monotonic) * 1000.0
     return session_data
 
 
@@ -412,14 +364,11 @@ async def run_worker_sessions(
     config: dict[str, Any],
 ) -> list[dict[str, Any]]:
     tasks = [
-        asyncio.create_task(
-            run_single_session(
-                worker_id=worker_id,
-                worker_session_idx=idx,
-                config=config,
-            )
-        )
-        for idx in range(session_count)
+        asyncio.create_task(run_single_session(
+            worker_id=worker_id,
+            worker_session_idx=idx,
+            config=config,
+        )) for idx in range(session_count)
     ]
     if not tasks:
         return []
@@ -437,29 +386,23 @@ def worker_entry(
     try:
         ready_queue.put({"worker_id": worker_id, "status": "ready"})
         start_event.wait()
-        sessions = asyncio.run(
-            run_worker_sessions(
-                worker_id=worker_id,
-                session_count=session_count,
-                config=config,
-            )
-        )
-        result_queue.put(
-            {
-                "worker_id": worker_id,
-                "status": "ok",
-                "sessions": sessions,
-            }
-        )
+        sessions = asyncio.run(run_worker_sessions(
+            worker_id=worker_id,
+            session_count=session_count,
+            config=config,
+        ))
+        result_queue.put({
+            "worker_id": worker_id,
+            "status": "ok",
+            "sessions": sessions,
+        })
     except Exception as exc:
-        result_queue.put(
-            {
-                "worker_id": worker_id,
-                "status": "error",
-                "error": str(exc),
-                "traceback": traceback.format_exc(),
-            }
-        )
+        result_queue.put({
+            "worker_id": worker_id,
+            "status": "error",
+            "error": str(exc),
+            "traceback": traceback.format_exc(),
+        })
 
 
 def build_summary(
@@ -517,33 +460,22 @@ def build_summary(
     if len(all_chunk_finish_epochs) >= 2 and total_chunk_bytes > 0:
         duration_s = max(all_chunk_finish_epochs) - min(all_chunk_finish_epochs)
         if duration_s > 0:
-            global_goodput_mbps = (
-                total_chunk_bytes * 8.0 / duration_s / 1_000_000.0
-            )
+            global_goodput_mbps = (total_chunk_bytes * 8.0 / duration_s / 1_000_000.0)
 
-    bucket_throughputs_mbps = [
-        (bytes_count * 8.0) / 1_000_000.0
-        for _, bytes_count in sorted(bucket_bytes.items())
-    ]
+    bucket_throughputs_mbps = [(bytes_count * 8.0) / 1_000_000.0 for _, bytes_count in sorted(bucket_bytes.items())]
     bucket_stats = summarize_series(bucket_throughputs_mbps)
 
-    chunk_gap_threshold_breaches = [
-        value for value in chunk_gaps if value >= chunk_gap_threshold_ms
-    ]
+    chunk_gap_threshold_breaches = [value for value in chunk_gaps if value >= chunk_gap_threshold_ms]
     non_success = len(sessions) - status_counts.get("success", 0)
 
     fail_reasons: list[str] = []
     if non_success > 0:
-        fail_reasons.append(
-            f"{non_success} session(s) did not complete successfully."
-        )
+        fail_reasons.append(f"{non_success} session(s) did not complete successfully.")
     if not chunk_gaps:
         fail_reasons.append("No chunk gap data collected.")
     if chunk_gap_threshold_breaches:
-        fail_reasons.append(
-            f"{len(chunk_gap_threshold_breaches)} chunk gap(s) were >= "
-            f"{chunk_gap_threshold_ms:.0f}ms."
-        )
+        fail_reasons.append(f"{len(chunk_gap_threshold_breaches)} chunk gap(s) were >= "
+                            f"{chunk_gap_threshold_ms:.0f}ms.")
 
     passed = len(fail_reasons) == 0
     progressive_ratio = None
@@ -554,20 +486,18 @@ def build_summary(
         "passed": passed,
         "fail_reasons": fail_reasons,
         "sessions": {
-            "total": len(sessions),
-            "success": status_counts.get("success", 0),
-            "failed": status_counts.get("failed", 0),
-            "timeout": status_counts.get("timeout", 0),
-            "protocol_error": status_counts.get("protocol_error", 0),
-            "other": (
-                len(sessions)
-                - (
-                    status_counts.get("success", 0)
-                    + status_counts.get("failed", 0)
-                    + status_counts.get("timeout", 0)
-                    + status_counts.get("protocol_error", 0)
-                )
-            ),
+            "total":
+            len(sessions),
+            "success":
+            status_counts.get("success", 0),
+            "failed":
+            status_counts.get("failed", 0),
+            "timeout":
+            status_counts.get("timeout", 0),
+            "protocol_error":
+            status_counts.get("protocol_error", 0),
+            "other": (len(sessions) - (status_counts.get("success", 0) + status_counts.get("failed", 0) +
+                                       status_counts.get("timeout", 0) + status_counts.get("protocol_error", 0))),
         },
         "chunk_gap_ms": {
             **chunk_gap_stats,
@@ -606,51 +536,39 @@ def print_summary(
     bucket_bw = bandwidth["bucketed_1s"]
 
     print("=== LTX2 Realtime Stress Test Summary ===")
-    print(
-        "Run: "
-        f"url={run_info['url']} clients={run_info['clients']} "
-        f"processes={run_info['processes']} "
-        f"preset={run_info['preset_id']} "
-        f"curated_limit={run_info['curated_limit']}"
-    )
-    print(
-        "Sessions: "
-        f"total={sessions['total']} success={sessions['success']} "
-        f"failed={sessions['failed']} timeout={sessions['timeout']} "
-        f"protocol_error={sessions['protocol_error']}"
-    )
-    print(
-        "Chunk gap ms: "
-        f"min={format_num(chunk_gap['min'])} "
-        f"p50={format_num(chunk_gap['p50'])} "
-        f"p95={format_num(chunk_gap['p95'])} "
-        f"p99={format_num(chunk_gap['p99'])} "
-        f"max={format_num(chunk_gap['max'])} "
-        f"threshold={format_num(chunk_gap['threshold_ms'])} "
-        f"breaches={chunk_gap['breach_count']}"
-    )
-    print(
-        "Queue wait ms: "
-        f"min={format_num(queue_wait['min'])} "
-        f"p50={format_num(queue_wait['p50'])} "
-        f"p95={format_num(queue_wait['p95'])} "
-        f"max={format_num(queue_wait['max'])}"
-    )
+    print("Run: "
+          f"url={run_info['url']} clients={run_info['clients']} "
+          f"processes={run_info['processes']} "
+          f"preset={run_info['preset_id']} "
+          f"curated_limit={run_info['curated_limit']}")
+    print("Sessions: "
+          f"total={sessions['total']} success={sessions['success']} "
+          f"failed={sessions['failed']} timeout={sessions['timeout']} "
+          f"protocol_error={sessions['protocol_error']}")
+    print("Chunk gap ms: "
+          f"min={format_num(chunk_gap['min'])} "
+          f"p50={format_num(chunk_gap['p50'])} "
+          f"p95={format_num(chunk_gap['p95'])} "
+          f"p99={format_num(chunk_gap['p99'])} "
+          f"max={format_num(chunk_gap['max'])} "
+          f"threshold={format_num(chunk_gap['threshold_ms'])} "
+          f"breaches={chunk_gap['breach_count']}")
+    print("Queue wait ms: "
+          f"min={format_num(queue_wait['min'])} "
+          f"p50={format_num(queue_wait['p50'])} "
+          f"p95={format_num(queue_wait['p95'])} "
+          f"max={format_num(queue_wait['max'])}")
     ratio = progressive["ratio"]
     ratio_text = "n/a" if ratio is None else f"{ratio * 100:.2f}%"
-    print(
-        "Progressive streaming: "
-        f"{progressive['success_sessions']}/"
-        f"{progressive['eligible_sessions']} ({ratio_text})"
-    )
-    print(
-        "Bandwidth Mbps: "
-        f"per_session_avg={format_num(per_session_bw['avg'])} "
-        f"per_session_p95={format_num(per_session_bw['p95'])} "
-        f"global={format_num(bandwidth['global_goodput_mbps'])} "
-        f"bucket_avg={format_num(bucket_bw['avg_mbps'])} "
-        f"bucket_peak={format_num(bucket_bw['peak_mbps'])}"
-    )
+    print("Progressive streaming: "
+          f"{progressive['success_sessions']}/"
+          f"{progressive['eligible_sessions']} ({ratio_text})")
+    print("Bandwidth Mbps: "
+          f"per_session_avg={format_num(per_session_bw['avg'])} "
+          f"per_session_p95={format_num(per_session_bw['p95'])} "
+          f"global={format_num(bandwidth['global_goodput_mbps'])} "
+          f"bucket_avg={format_num(bucket_bw['avg_mbps'])} "
+          f"bucket_peak={format_num(bucket_bw['peak_mbps'])}")
     print(f"VERDICT: {'PASS' if summary['passed'] else 'FAIL'}")
     if summary["fail_reasons"]:
         print("Fail reasons:")
@@ -670,10 +588,8 @@ def distribute_sessions(total_clients: int, process_count: int) -> list[int]:
 
 def run_stress(args: argparse.Namespace) -> tuple[dict[str, Any], int]:
     if websockets is None:
-        raise RuntimeError(
-            "Missing dependency: websockets. Install it before running this "
-            "stress test."
-        )
+        raise RuntimeError("Missing dependency: websockets. Install it before running this "
+                           "stress test.")
 
     preset_file = Path(args.preset_file).expanduser().resolve()
     selected_preset_id, curated_prompts, total_prompt_count = load_curated_prompts(
@@ -735,13 +651,8 @@ def run_stress(args: argparse.Namespace) -> tuple[dict[str, Any], int]:
 
         start_event.set()
 
-        result_deadline = (
-            time.monotonic()
-            + args.connect_timeout_s
-            + args.session_timeout_s
-            + args.post_complete_wait_s
-            + 180.0
-        )
+        result_deadline = (time.monotonic() + args.connect_timeout_s + args.session_timeout_s +
+                           args.post_complete_wait_s + 180.0)
         worker_results: list[dict[str, Any]] = []
         while len(worker_results) < len(processes):
             timeout_s = max(0.1, result_deadline - time.monotonic())
@@ -765,24 +676,20 @@ def run_stress(args: argparse.Namespace) -> tuple[dict[str, Any], int]:
             if result.get("status") == "ok":
                 sessions.extend(result.get("sessions", []))
             else:
-                worker_errors.append(
-                    {
-                        "worker_id": result.get("worker_id"),
-                        "error": result.get("error"),
-                        "traceback": result.get("traceback"),
-                    }
-                )
+                worker_errors.append({
+                    "worker_id": result.get("worker_id"),
+                    "error": result.get("error"),
+                    "traceback": result.get("traceback"),
+                })
 
         received_workers = {result.get("worker_id") for result in worker_results}
         expected_workers = set(range(len(processes)))
         missing_workers = sorted(expected_workers - received_workers)
         for worker_id in missing_workers:
-            worker_errors.append(
-                {
-                    "worker_id": worker_id,
-                    "error": "No worker result received.",
-                }
-            )
+            worker_errors.append({
+                "worker_id": worker_id,
+                "error": "No worker result received.",
+            })
 
         run_end_epoch = time.time()
         run_end_iso = iso_from_epoch(run_end_epoch)
@@ -795,9 +702,8 @@ def run_stress(args: argparse.Namespace) -> tuple[dict[str, Any], int]:
 
         if worker_errors:
             summary["passed"] = False
-            summary["fail_reasons"] = list(summary["fail_reasons"]) + [
-                f"{len(worker_errors)} worker error(s) occurred."
-            ]
+            summary["fail_reasons"] = list(
+                summary["fail_reasons"]) + [f"{len(worker_errors)} worker error(s) occurred."]
 
         output_payload = {
             "run_info": {
@@ -833,9 +739,7 @@ def run_stress(args: argparse.Namespace) -> tuple[dict[str, Any], int]:
 
 
 def parse_args() -> argparse.Namespace:
-    parser = argparse.ArgumentParser(
-        description="Multiprocess realtime stress test for LTX2 streaming.",
-    )
+    parser = argparse.ArgumentParser(description="Multiprocess realtime stress test for LTX2 streaming.", )
     parser.add_argument(
         "-u",
         "--url",

apps/dreamverse/dreamverse/tests/test_session_init_image.py

@@ -47,13 +47,11 @@ def test_persist_session_init_image_returns_none_when_missing_data():
 
 def test_persist_session_init_image_rejects_unsupported_mime():
     with pytest.raises(ValueError, match="PNG, JPEG, or WebP"):
-        persist_session_init_image(
-            {
-                "name": "frame.gif",
-                "mime_type": "image/gif",
-                "data_url": "data:image/gif;base64,R0lGODlhAQABAAAAACw=",
-            }
-        )
+        persist_session_init_image({
+            "name": "frame.gif",
+            "mime_type": "image/gif",
+            "data_url": "data:image/gif;base64,R0lGODlhAQABAAAAACw=",
+        })
 
 
 def test_persist_session_init_image_rejects_large_payload(monkeypatch):
@@ -66,10 +64,8 @@ def test_persist_session_init_image_rejects_large_payload(monkeypatch):
     monkeypatch.setattr(base64, "b64decode", fake_b64decode)
 
     with pytest.raises(ValueError, match="15 MB or smaller"):
-        persist_session_init_image(
-            {
-                "name": "frame.png",
-                "mime_type": "image/png",
-                "data_url": data_url,
-            }
-        )
+        persist_session_init_image({
+            "name": "frame.png",
+            "mime_type": "image/png",
+            "data_url": data_url,
+        })

apps/dreamverse/scripts/launch/launch_backend_dreamverse.sh

@@ -39,6 +39,17 @@ export FASTVIDEO_GENERATION_SEGMENT_CAP="${FASTVIDEO_GENERATION_SEGMENT_CAP:-6}"
 export FASTVIDEO_PROMPT_AUTO_SLEEP_MS="${FASTVIDEO_PROMPT_AUTO_SLEEP_MS:-120}"
 export FASTVIDEO_PROMPT_AUTO_TIMEOUT_MS="${FASTVIDEO_PROMPT_AUTO_TIMEOUT_MS:-1800}"
 
+if [[ "${ENABLE_TORCH_COMPILE}" == "1" ]]; then
+  # Persist Inductor, AOTAutograd, and Triton artifacts across launches.
+  export DREAMVERSE_TORCH_COMPILE_CACHE_ROOT="${DREAMVERSE_TORCH_COMPILE_CACHE_ROOT:-${HOME}/.cache/dreamverse/torch_compile}"
+  export TORCHINDUCTOR_CACHE_DIR="${TORCHINDUCTOR_CACHE_DIR:-${DREAMVERSE_TORCH_COMPILE_CACHE_ROOT}/inductor}"
+  export TRITON_CACHE_DIR="${TRITON_CACHE_DIR:-${DREAMVERSE_TORCH_COMPILE_CACHE_ROOT}/triton}"
+  export TORCHINDUCTOR_FX_GRAPH_CACHE="${TORCHINDUCTOR_FX_GRAPH_CACHE:-1}"
+  export TORCHINDUCTOR_AUTOGRAD_CACHE="${TORCHINDUCTOR_AUTOGRAD_CACHE:-1}"
+  mkdir -p "${TORCHINDUCTOR_CACHE_DIR}" "${TRITON_CACHE_DIR}"
+  echo "[launch-demo] torch.compile cache: ${DREAMVERSE_TORCH_COMPILE_CACHE_ROOT}"
+fi
+
 cd "${DREAMVERSE_ROOT}"
 
 if ! command -v dreamverse-server >/dev/null 2>&1; then

apps/dreamverse/scripts/modal/modal_app.py

@@ -8,12 +8,10 @@ import modal
 
 IMAGE = os.environ.get("DREAMVERSE_IMAGE")
 if not IMAGE:
-    raise RuntimeError(
-        "DREAMVERSE_IMAGE is required. Set it to a published SHA-specific Dreamverse image, "
-        "for example a dreamverse-backend-cuda13.0.0-sha-* tag or a "
-        "dreamverse-ui-cuda13.0.0-sha-* tag if serving the static UI. "
-        "CUDA 12 / cu126 images use the corresponding cuda12.6.3 tag."
-    )
+    raise RuntimeError("DREAMVERSE_IMAGE is required. Set it to a published SHA-specific Dreamverse image, "
+                       "for example a dreamverse-backend-cuda13.0.0-sha-* tag or a "
+                       "dreamverse-ui-cuda13.0.0-sha-* tag if serving the static UI. "
+                       "CUDA 12 / cu126 images use the corresponding cuda12.6.3 tag.")
 
 # ``@modal.web_server`` invokes ``serve()`` directly and bypasses the image
 # ENTRYPOINT (``docker/docker_entrypoint.sh``).  That entrypoint normally
@@ -65,14 +63,10 @@ def serve():
     # ``or ""`` collapses ``None`` (unset) into an empty string, ``.strip()``
     # collapses whitespace-only values (e.g. ``"   "``) — both should be
     # treated as missing.
-    missing = [
-        k for k in _REQUIRED_SECRET_KEYS
-        if not (os.environ.get(k) or "").strip()
-    ]
+    missing = [k for k in _REQUIRED_SECRET_KEYS if not (os.environ.get(k) or "").strip()]
     if missing:
-        raise RuntimeError(
-            "dreamverse-api-keys secret is missing required entries: "
-            f"{', '.join(missing)}. Add them with `modal secret create "
-            "dreamverse-api-keys ... --force` and redeploy "
-            "(see apps/dreamverse/scripts/modal/README.md).")
+        raise RuntimeError("dreamverse-api-keys secret is missing required entries: "
+                           f"{', '.join(missing)}. Add them with `modal secret create "
+                           "dreamverse-api-keys ... --force` and redeploy "
+                           "(see apps/dreamverse/scripts/modal/README.md).")
     subprocess.Popen(["dreamverse-server", "--host", "0.0.0.0", "--port", "8009"])

apps/fastvideo_studio/e2e/create-job.spec.ts

@@ -13,10 +13,9 @@ test.describe('create inference job', () => {
   test('creates a T2V job and shows it in the queue', async ({ page }) => {
     await page.goto('/inference');
 
-    // The "Create Job" button reveals a workload menu on hover; wait for the
-    // T2V item to become visible before clicking so the CSS hover transition
-    // can't race the click.
-    await page.getByRole('button', { name: /create job/i }).hover();
+    // The trigger opens a real menu on click, so this path works for touch,
+    // mouse, and keyboard users.
+    await page.getByRole('button', { name: /create job/i }).click();
     const t2vItem = page.getByRole('menuitem', { name: /T2V/i });
     await expect(t2vItem).toBeVisible();
     await t2vItem.click();

apps/fastvideo_studio/e2e/gallery.spec.ts

@@ -4,7 +4,7 @@ import { API_BASE, skipWithoutMock } from './helpers';
 
 /**
  * Gallery page: the seeded completed inference job surfaces as a media tile
- * (an <article> wrapping a <video>) captioned with its prompt.
+ * with playback controls or an explicit media-error fallback.
  */
 test.describe('gallery', () => {
   skipWithoutMock();
@@ -30,12 +30,15 @@ test.describe('gallery', () => {
       page.getByRole('heading', { level: 1, name: 'Gallery' }),
     ).toBeVisible();
 
-    // The completed job renders as an <article> containing a <video> tile.
-    const tile = page
-      .locator('article')
-      .filter({ has: page.locator('video') });
-    await expect(tile.first()).toBeVisible();
+    const tile = page.locator('article').filter({ hasText: completed!.prompt });
+    await expect(tile).toBeVisible();
+    await expect(
+      tile.locator('video').or(tile.getByText('Preview unavailable')),
+    ).toBeVisible();
 
-    await expect(page.getByText(completed!.prompt)).toBeVisible();
+    const video = tile.locator('video');
+    if (await video.isVisible()) {
+      await expect(video).toHaveAttribute('controls', '');
+    }
   });
 });

apps/fastvideo_studio/e2e/shell.spec.ts

@@ -42,6 +42,74 @@ test.describe('app shell', () => {
       await expect(
         page.getByRole('heading', { level: 1, name: section.title }),
       ).toBeVisible();
+      await expect(page.getByRole('main')).toHaveCount(1);
     }
   });
+
+  test('keeps navigation and content usable at responsive breakpoints', async ({
+    page,
+  }) => {
+    for (const width of [320, 375, 414, 768]) {
+      await page.setViewportSize({ width, height: 800 });
+      await page.goto('/inference');
+
+      const main = page.getByRole('main');
+      await expect(main).toBeVisible();
+      await expect(
+        page.getByRole('button', { name: /Create Job/i }),
+      ).toBeVisible();
+
+      const initialBox = await main.boundingBox();
+      expect(initialBox?.x).toBe(width < 768 ? 0 : 220);
+      expect(initialBox?.width).toBe(width < 768 ? width : width - 220);
+
+      const navigation = page.getByRole('navigation', {
+        name: 'Primary navigation',
+      });
+      if (width < 768) {
+        await expect(
+          page.getByRole('button', { name: 'Open navigation' }),
+        ).toBeVisible();
+        await page.getByRole('button', { name: 'Open navigation' }).click();
+      }
+      await expect(navigation).toBeVisible();
+      await navigation.getByRole('link', { name: 'Datasets' }).click();
+
+      await expect(page).toHaveURL(/\/datasets$/);
+      expect(
+        await page.evaluate(
+          () => document.documentElement.scrollWidth <= window.innerWidth,
+        ),
+      ).toBe(true);
+    }
+  });
+
+  test('uses full-width detail drawers on mobile', async ({ page }) => {
+    await page.setViewportSize({ width: 320, height: 800 });
+    await page.goto('/inference');
+
+    await page
+      .locator('article button[aria-pressed="false"]')
+      .first()
+      .click();
+    const jobDrawer = page.getByRole('dialog', { name: 'Job details' });
+    await expect(jobDrawer).toBeVisible();
+    expect(await jobDrawer.boundingBox()).toMatchObject({ x: 0, width: 320 });
+    await jobDrawer.getByRole('button', { name: 'Close' }).click();
+
+    await page.goto('/datasets');
+    await page
+      .locator('article button[aria-pressed="false"]')
+      .first()
+      .click();
+
+    const datasetDrawer = page.getByRole('dialog', {
+      name: /dataset details$/,
+    });
+    await expect(datasetDrawer).toBeVisible();
+    expect(await datasetDrawer.boundingBox()).toMatchObject({
+      x: 0,
+      width: 320,
+    });
+  });
 });

apps/fastvideo_studio/package-lock.json

@@ -9,6 +9,7 @@
 			"version": "0.1.0",
 			"dependencies": {
 				"@radix-ui/react-dialog": "^1.1.0",
+				"@radix-ui/react-dropdown-menu": "^2.1.24",
 				"@radix-ui/react-label": "^2.1.8",
 				"@radix-ui/react-scroll-area": "^1.2.10",
 				"@radix-ui/react-select": "^2.2.6",
@@ -1936,6 +1937,183 @@
 				}
 			}
 		},
+		"node_modules/@radix-ui/react-dropdown-menu": {
+			"version": "2.1.24",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-dropdown-menu/-/react-dropdown-menu-2.1.24.tgz",
+			"integrity": "sha512-geq8l2rJkxvkXsT9RMgtUE3P8pITFpTsvYpbySi1IH4fZEABD/Gp85myayFgxk0ktljGMJnCbeFkyTusvSvv7g==",
+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/primitive": "1.1.7",
+				"@radix-ui/react-compose-refs": "1.1.5",
+				"@radix-ui/react-context": "1.2.2",
+				"@radix-ui/react-id": "1.1.4",
+				"@radix-ui/react-menu": "2.1.24",
+				"@radix-ui/react-primitive": "2.1.10",
+				"@radix-ui/react-use-controllable-state": "1.2.6"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"@types/react-dom": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc",
+				"react-dom": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				},
+				"@types/react-dom": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-dropdown-menu/node_modules/@radix-ui/primitive": {
+			"version": "1.1.7",
+			"resolved": "https://registry.npmjs.org/@radix-ui/primitive/-/primitive-1.1.7.tgz",
+			"integrity": "sha512-rqWnm76nYT8HoNNqEjpgJ7Pw/DrBj5iBTrmEPo6HTX5+VJyBNOqTdv4g89G63HuR5g0AaENoAcH7Is5fF2kZ8Q==",
+			"license": "MIT"
+		},
+		"node_modules/@radix-ui/react-dropdown-menu/node_modules/@radix-ui/react-compose-refs": {
+			"version": "1.1.5",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-compose-refs/-/react-compose-refs-1.1.5.tgz",
+			"integrity": "sha512-+48PbAAbq3didjJxa+OaWY2ZwgAKsNiRGyeHKszblZMQ+kcpd9pAaT11cMkGEie0vsOi3QdeTE6d5Fe3Gn61kA==",
+			"license": "MIT",
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-dropdown-menu/node_modules/@radix-ui/react-context": {
+			"version": "1.2.2",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-context/-/react-context-1.2.2.tgz",
+			"integrity": "sha512-RHCUGwKHDr0hDGg4X7ma4JG4/+12qxw8rkh5QKdDldlCvtja6nUx1Ef/8HVrJze81lEsgLQlqjzjGNHantgnQA==",
+			"license": "MIT",
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-dropdown-menu/node_modules/@radix-ui/react-id": {
+			"version": "1.1.4",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-id/-/react-id-1.1.4.tgz",
+			"integrity": "sha512-TMQp2llA+RYn7JcjnrMnz7wN4pcVttPZnRZo52PLQsoLVKzNlVwUeHmfePgTgRluXFvlD3GD5g5MOVVTJCO0qA==",
+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/react-use-layout-effect": "1.1.4"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-dropdown-menu/node_modules/@radix-ui/react-primitive": {
+			"version": "2.1.10",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-primitive/-/react-primitive-2.1.10.tgz",
+			"integrity": "sha512-MucOnzh6hR5mid6VpkbglRAMYMjKLqRnGBbjXkzjK52fuQDd1qbkx78a5P40mkcnVXJdEVxm26E9OPAiUq7nBg==",
+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/react-slot": "1.3.3"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"@types/react-dom": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc",
+				"react-dom": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				},
+				"@types/react-dom": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-dropdown-menu/node_modules/@radix-ui/react-slot": {
+			"version": "1.3.3",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-slot/-/react-slot-1.3.3.tgz",
+			"integrity": "sha512-qx7oqnYbxnK9kYI9m317qmFmEgo6ywqWvbTogdj7cL9p3/yx4M48p7Rnw5z3H890cL/ow/EeWJsuTykeZVXP5Q==",
+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/react-compose-refs": "1.1.5"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-dropdown-menu/node_modules/@radix-ui/react-use-controllable-state": {
+			"version": "1.2.6",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-use-controllable-state/-/react-use-controllable-state-1.2.6.tgz",
+			"integrity": "sha512-uEQJGT97ZA/TgP/Hydw47lHu+/vQj6z/0jA+WeTbK1o9Rx45GImjpD0tc3W5ad3D6XTSR6e1yEO0FvGq6WQfVQ==",
+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/primitive": "1.1.7",
+				"@radix-ui/react-use-effect-event": "0.0.5",
+				"@radix-ui/react-use-layout-effect": "1.1.4"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-dropdown-menu/node_modules/@radix-ui/react-use-effect-event": {
+			"version": "0.0.5",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-use-effect-event/-/react-use-effect-event-0.0.5.tgz",
+			"integrity": "sha512-7cshFL8HGS/7HEiHH+9kL9HBwp2sa9yX18Knwek6KYWmXwM7pegMgta2AXMQKI+rq3JnfSj9x8wYqFMTdG1Jgg==",
+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/react-use-layout-effect": "1.1.4"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-dropdown-menu/node_modules/@radix-ui/react-use-layout-effect": {
+			"version": "1.1.4",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-use-layout-effect/-/react-use-layout-effect-1.1.4.tgz",
+			"integrity": "sha512-K20DkRkUwDnxEYMBPcg3Y6voLkEy5p5QQmszZgLngKKiC7dzBR/aEuK3w1qlx2JWDUNH6FluahYdgR3BP+QbYw==",
+			"license": "MIT",
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
 		"node_modules/@radix-ui/react-focus-guards": {
 			"version": "1.1.4",
 			"resolved": "https://registry.npmjs.org/@radix-ui/react-focus-guards/-/react-focus-guards-1.1.4.tgz",
@@ -2017,6 +2195,494 @@
 				}
 			}
 		},
+		"node_modules/@radix-ui/react-menu": {
+			"version": "2.1.24",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-menu/-/react-menu-2.1.24.tgz",
+			"integrity": "sha512-uW7RVuU6Lp/ZtfeY4b3kL32zccgEWvPv1+cf17ubYzHa9cL8AHokmk36cG/XEiH/smbQvumnieXX9j/e9RqJWA==",
+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/primitive": "1.1.7",
+				"@radix-ui/react-collection": "1.1.15",
+				"@radix-ui/react-compose-refs": "1.1.5",
+				"@radix-ui/react-context": "1.2.2",
+				"@radix-ui/react-direction": "1.1.4",
+				"@radix-ui/react-dismissable-layer": "1.1.19",
+				"@radix-ui/react-focus-guards": "1.1.6",
+				"@radix-ui/react-focus-scope": "1.1.16",
+				"@radix-ui/react-id": "1.1.4",
+				"@radix-ui/react-popper": "1.3.7",
+				"@radix-ui/react-portal": "1.1.17",
+				"@radix-ui/react-presence": "1.1.10",
+				"@radix-ui/react-primitive": "2.1.10",
+				"@radix-ui/react-roving-focus": "1.1.19",
+				"@radix-ui/react-slot": "1.3.3",
+				"@radix-ui/react-use-callback-ref": "1.1.4",
+				"aria-hidden": "^1.2.4",
+				"react-remove-scroll": "^2.7.2"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"@types/react-dom": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc",
+				"react-dom": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				},
+				"@types/react-dom": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-menu/node_modules/@radix-ui/primitive": {
+			"version": "1.1.7",
+			"resolved": "https://registry.npmjs.org/@radix-ui/primitive/-/primitive-1.1.7.tgz",
+			"integrity": "sha512-rqWnm76nYT8HoNNqEjpgJ7Pw/DrBj5iBTrmEPo6HTX5+VJyBNOqTdv4g89G63HuR5g0AaENoAcH7Is5fF2kZ8Q==",
+			"license": "MIT"
+		},
+		"node_modules/@radix-ui/react-menu/node_modules/@radix-ui/react-arrow": {
+			"version": "1.1.15",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-arrow/-/react-arrow-1.1.15.tgz",
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+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/react-primitive": "2.1.10"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"@types/react-dom": "*",
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+			},
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+				"@types/react": {
+					"optional": true
+				},
+				"@types/react-dom": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-menu/node_modules/@radix-ui/react-collection": {
+			"version": "1.1.15",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-collection/-/react-collection-1.1.15.tgz",
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+			},
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+				"@types/react-dom": "*",
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+				},
+				"@types/react-dom": {
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+		},
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+			"license": "MIT",
+			"peerDependencies": {
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+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
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+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
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+			},
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+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
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+			"resolved": "https://registry.npmjs.org/@radix-ui/react-direction/-/react-direction-1.1.4.tgz",
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+			"license": "MIT",
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
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+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/react-use-layout-effect": "1.1.4"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
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+				}
+			}
+		},
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+			"license": "MIT",
+			"dependencies": {
+				"@floating-ui/react-dom": "^2.0.0",
+				"@radix-ui/react-arrow": "1.1.15",
+				"@radix-ui/react-compose-refs": "1.1.5",
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+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/react-primitive": "2.1.10",
+				"@radix-ui/react-use-layout-effect": "1.1.4"
+			},
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+					"optional": true
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+				"@types/react-dom": {
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+		},
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+			"license": "MIT",
+			"dependencies": {
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+			},
+			"peerDependencies": {
+				"@types/react": "*",
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+				"@types/react": {
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+				"@types/react-dom": {
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+				}
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+		},
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+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/react-slot": "1.3.3"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"@types/react-dom": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc",
+				"react-dom": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
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+				"@types/react": {
+					"optional": true
+				},
+				"@types/react-dom": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-menu/node_modules/@radix-ui/react-roving-focus": {
+			"version": "1.1.19",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-roving-focus/-/react-roving-focus-1.1.19.tgz",
+			"integrity": "sha512-V9jI6hDjT7l3jsCQD9bLNvDLM3tH/gdbOTp7Tefp3hbbgCGQoK7tUvrWiRlcoBHIZ809ElXwNQwVo0B98LuTXQ==",
+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/primitive": "1.1.7",
+				"@radix-ui/react-collection": "1.1.15",
+				"@radix-ui/react-compose-refs": "1.1.5",
+				"@radix-ui/react-context": "1.2.2",
+				"@radix-ui/react-direction": "1.1.4",
+				"@radix-ui/react-id": "1.1.4",
+				"@radix-ui/react-primitive": "2.1.10",
+				"@radix-ui/react-use-callback-ref": "1.1.4",
+				"@radix-ui/react-use-controllable-state": "1.2.6",
+				"@radix-ui/react-use-is-hydrated": "0.1.3",
+				"@radix-ui/react-use-layout-effect": "1.1.4"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"@types/react-dom": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc",
+				"react-dom": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				},
+				"@types/react-dom": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-menu/node_modules/@radix-ui/react-slot": {
+			"version": "1.3.3",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-slot/-/react-slot-1.3.3.tgz",
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+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/react-compose-refs": "1.1.5"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-menu/node_modules/@radix-ui/react-use-callback-ref": {
+			"version": "1.1.4",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-use-callback-ref/-/react-use-callback-ref-1.1.4.tgz",
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+			"license": "MIT",
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-menu/node_modules/@radix-ui/react-use-controllable-state": {
+			"version": "1.2.6",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-use-controllable-state/-/react-use-controllable-state-1.2.6.tgz",
+			"integrity": "sha512-uEQJGT97ZA/TgP/Hydw47lHu+/vQj6z/0jA+WeTbK1o9Rx45GImjpD0tc3W5ad3D6XTSR6e1yEO0FvGq6WQfVQ==",
+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/primitive": "1.1.7",
+				"@radix-ui/react-use-effect-event": "0.0.5",
+				"@radix-ui/react-use-layout-effect": "1.1.4"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-menu/node_modules/@radix-ui/react-use-effect-event": {
+			"version": "0.0.5",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-use-effect-event/-/react-use-effect-event-0.0.5.tgz",
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+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/react-use-layout-effect": "1.1.4"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
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+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
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+			"version": "1.1.4",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-use-layout-effect/-/react-use-layout-effect-1.1.4.tgz",
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+			"license": "MIT",
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-menu/node_modules/@radix-ui/react-use-rect": {
+			"version": "1.1.4",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-use-rect/-/react-use-rect-1.1.4.tgz",
+			"integrity": "sha512-cSOCh6JlkmfjLyNcLiu2nB4v+nm+dkZ+Q5KHWk/soo4U7ZLiEQFKHK9/YmtBHjfCEaU43IBKQOc4/uJmCaiCTQ==",
+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/rect": "1.1.3"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-menu/node_modules/@radix-ui/react-use-size": {
+			"version": "1.1.4",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-use-size/-/react-use-size-1.1.4.tgz",
+			"integrity": "sha512-D3anSY15EJoxrihpsXI6SMrmmonnQtR2ni7arO+Lfdg3O95b9hNXxONk8jA5C8ANdF/h5HMAxejgs8PWJ6rlhw==",
+			"license": "MIT",
+			"dependencies": {
+				"@radix-ui/react-use-layout-effect": "1.1.4"
+			},
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/@radix-ui/react-menu/node_modules/@radix-ui/rect": {
+			"version": "1.1.3",
+			"resolved": "https://registry.npmjs.org/@radix-ui/rect/-/rect-1.1.3.tgz",
+			"integrity": "sha512-JtyZR+mqgBibTo8xea3B6ZRmzZiM/YeVBtUkas6zMuXjAlfIFIW2FgqeM9eLyvEaYX66vr6DJMK+4U6LV0KhNw==",
+			"license": "MIT"
+		},
 		"node_modules/@radix-ui/react-popper": {
 			"version": "1.3.2",
 			"resolved": "https://registry.npmjs.org/@radix-ui/react-popper/-/react-popper-1.3.2.tgz",
@@ -2410,6 +3076,21 @@
 				}
 			}
 		},
+		"node_modules/@radix-ui/react-use-is-hydrated": {
+			"version": "0.1.3",
+			"resolved": "https://registry.npmjs.org/@radix-ui/react-use-is-hydrated/-/react-use-is-hydrated-0.1.3.tgz",
+			"integrity": "sha512-umO/aJ+82CpOnhDZUTbILCQf7kU/g0iv+oGs/Q8jw7IkhWBzaEP4sA268PhFAJTFetbwp3ICc6ktpI4TqtxcIw==",
+			"license": "MIT",
+			"peerDependencies": {
+				"@types/react": "*",
+				"react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc"
+			},
+			"peerDependenciesMeta": {
+				"@types/react": {
+					"optional": true
+				}
+			}
+		},
 		"node_modules/@radix-ui/react-use-layout-effect": {
 			"version": "1.1.2",
 			"resolved": "https://registry.npmjs.org/@radix-ui/react-use-layout-effect/-/react-use-layout-effect-1.1.2.tgz",

apps/fastvideo_studio/package.json

@@ -18,6 +18,7 @@
 	},
 	"dependencies": {
 		"@radix-ui/react-dialog": "^1.1.0",
+		"@radix-ui/react-dropdown-menu": "^2.1.24",
 		"@radix-ui/react-label": "^2.1.8",
 		"@radix-ui/react-scroll-area": "^1.2.10",
 		"@radix-ui/react-select": "^2.2.6",

apps/fastvideo_studio/src/app/datasets/page.test.tsx

@@ -0,0 +1,64 @@
+import { act, fireEvent, render, screen } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+
+import { HeaderActionsProvider } from '@/components/shell/HeaderActionsContext';
+import { getDatasets, type Dataset } from '@/lib/api';
+
+import DatasetsPage from './page';
+
+vi.mock('@/lib/api', () => ({
+  getDatasets: vi.fn(),
+}));
+
+vi.mock('@/components/datasets/AddDatasetButton', () => ({
+  default: () => null,
+}));
+
+vi.mock('@/components/datasets/CreateDatasetModal', () => ({
+  default: () => null,
+}));
+
+vi.mock('@/components/datasets/DatasetCard', () => ({
+  default: ({ dataset }: { dataset: Dataset }) => <div>{dataset.name}</div>,
+}));
+
+function renderPage() {
+  return render(
+    <HeaderActionsProvider>
+      <DatasetsPage />
+    </HeaderActionsProvider>,
+  );
+}
+
+describe('DatasetsPage', () => {
+  it('shows loading content before the initial request settles', async () => {
+    let resolveDatasets: (datasets: Dataset[]) => void = () => {};
+    vi.mocked(getDatasets).mockReturnValue(
+      new Promise<Dataset[]>((resolve) => {
+        resolveDatasets = resolve;
+      }),
+    );
+
+    renderPage();
+    expect(screen.getByLabelText('Loading datasets')).toBeInTheDocument();
+    expect(screen.queryByText('No datasets yet.')).not.toBeInTheDocument();
+
+    act(() => resolveDatasets([]));
+    expect(await screen.findByText('No datasets yet.')).toBeInTheDocument();
+  });
+
+  it('shows API failures separately from an empty list and retries', async () => {
+    vi.spyOn(console, 'error').mockImplementation(() => {});
+    vi.mocked(getDatasets).mockRejectedValueOnce(new Error('network down'));
+
+    renderPage();
+    expect(
+      await screen.findByText(/Could not load datasets from the Studio API/),
+    ).toBeInTheDocument();
+    expect(screen.queryByText('No datasets yet.')).not.toBeInTheDocument();
+
+    vi.mocked(getDatasets).mockResolvedValueOnce([]);
+    fireEvent.click(screen.getByRole('button', { name: 'Try Again' }));
+    expect(await screen.findByText('No datasets yet.')).toBeInTheDocument();
+  });
+});

apps/fastvideo_studio/src/app/datasets/page.tsx

@@ -1,12 +1,14 @@
 'use client';
 
 import * as React from 'react';
+import { AlertTriangle } from 'lucide-react';
 
 import AddDatasetButton from '@/components/datasets/AddDatasetButton';
 import CreateDatasetModal from '@/components/datasets/CreateDatasetModal';
 import DatasetCard from '@/components/datasets/DatasetCard';
 import { HeaderActions } from '@/components/shell/HeaderActionsContext';
 import { Card } from '@/components/ui/card';
+import { Button } from '@/components/ui/button';
 import { useStore } from '@/hooks/useStore';
 import { getDatasets } from '@/lib/api';
 import type { Dataset } from '@/lib/api';
@@ -21,18 +23,28 @@ import {
 
 export default function DatasetsPage() {
   const [datasets, setDatasets] = React.useState<Dataset[]>([]);
+  const [isInitialLoading, setIsInitialLoading] = React.useState(true);
   const [error, setError] = React.useState<string | null>(null);
   const { open } = useStore(createDatasetModalStore);
+  const fetchSequence = React.useRef(0);
 
   const fetchDatasets = React.useCallback(async () => {
+    const sequence = ++fetchSequence.current;
     try {
-      setDatasets(await getDatasets());
-      setError(null);
+      const next = await getDatasets();
+      if (sequence === fetchSequence.current) {
+        setDatasets(next);
+        setError(null);
+      }
     } catch (err) {
       console.error('Failed to fetch datasets:', err);
-      // Distinguish an API outage from a genuinely empty list, so the user
-      // isn't told they have no datasets when the server is unreachable.
-      setError(err instanceof Error ? err.message : 'Failed to load datasets');
+      if (sequence === fetchSequence.current) {
+        setError(
+          'Could not load datasets from the Studio API. Check the server and try again.',
+        );
+      }
+    } finally {
+      if (sequence === fetchSequence.current) setIsInitialLoading(false);
     }
   }, []);
 
@@ -50,28 +62,67 @@ export default function DatasetsPage() {
       <HeaderActions>
         <AddDatasetButton />
       </HeaderActions>
-      <main className="mx-auto flex w-full max-w-[850px] flex-col gap-6 px-4 pb-12">
+      <div className="mx-auto flex w-full max-w-[850px] flex-col gap-6 px-4 pb-12">
         <Card className="p-6">
-          <div>
-            {error ? (
-              <p className="py-8 text-center text-destructive">{error}</p>
-            ) : datasets.length === 0 ? (
-              <p className="py-8 text-center text-muted-foreground">
-                No datasets yet.
-              </p>
-            ) : (
-              datasets.map((ds) => (
-                <DatasetCard
-                  key={ds.id}
-                  dataset={ds}
-                  onUpdated={fetchDatasets}
-                  onSelect={() => handleSelectDataset(ds)}
+          <div aria-busy={isInitialLoading}>
+            {isInitialLoading ? (
+              <div
+                aria-label="Loading datasets"
+                className="flex flex-col gap-3 py-2"
+              >
+                {[0, 1, 2].map((item) => (
+                  <div
+                    key={item}
+                    className="h-24 animate-pulse rounded-lg border border-border bg-muted/50"
+                  />
+                ))}
+              </div>
+            ) : error && datasets.length === 0 ? (
+              <div
+                role="alert"
+                className="flex flex-col items-center gap-3 py-8 text-center"
+              >
+                <AlertTriangle
+                  className="size-6 text-destructive"
+                  aria-hidden
                 />
-              ))
+                <p className="max-w-md text-sm text-muted-foreground">
+                  {error}
+                </p>
+                <Button type="button" variant="outline" onClick={fetchDatasets}>
+                  Try Again
+                </Button>
+              </div>
+            ) : (
+              <>
+                {error && (
+                  <p
+                    role="status"
+                    className="mb-3 rounded-lg border border-amber-500/50 bg-amber-500/10 px-3 py-2 text-sm text-foreground"
+                  >
+                    Dataset updates are temporarily unavailable. Showing the
+                    most recent results.
+                  </p>
+                )}
+                {datasets.length === 0 ? (
+                  <p className="py-8 text-center text-muted-foreground">
+                    No datasets yet.
+                  </p>
+                ) : (
+                  datasets.map((ds) => (
+                    <DatasetCard
+                      key={ds.id}
+                      dataset={ds}
+                      onUpdated={fetchDatasets}
+                      onSelect={() => handleSelectDataset(ds)}
+                    />
+                  ))
+                )}
+              </>
             )}
           </div>
         </Card>
-      </main>
+      </div>
       <CreateDatasetModal
         isOpen={open}
         onClose={() => setCreateDatasetModalOpen(false)}

apps/fastvideo_studio/src/app/gallery/page.test.tsx

@@ -1,4 +1,4 @@
-import { render, screen } from '@testing-library/react';
+import { fireEvent, render, screen } from '@testing-library/react';
 import { describe, expect, it, vi } from 'vitest';
 
 import GalleryPage from './page';
@@ -43,6 +43,22 @@ describe('GalleryPage', () => {
     expect(getJobsList).toHaveBeenCalledWith('inference');
   });
 
+  it('provides video controls and a visible fallback when media fails', async () => {
+    vi.mocked(getJobsList).mockResolvedValue([makeJob()]);
+    renderGallery();
+
+    const video = await screen.findByLabelText(
+      'Generated video: a cat surfing a wave',
+    );
+    expect(video).toHaveAttribute('controls');
+
+    fireEvent.error(video);
+    expect(screen.getByText('Preview unavailable')).toBeInTheDocument();
+    expect(
+      screen.getByText('The generated file could not be loaded.'),
+    ).toBeInTheDocument();
+  });
+
   it('shows the empty state when no completed videos exist', async () => {
     vi.mocked(getJobsList).mockResolvedValue([
       makeJob({ status: 'running', output_path: null }),

apps/fastvideo_studio/src/app/gallery/page.tsx

@@ -1,8 +1,9 @@
 'use client';
 
-import { Loader2 } from 'lucide-react';
+import { AlertTriangle, ImageOff, Loader2 } from 'lucide-react';
 import { useEffect, useState } from 'react';
 
+import { Button } from '@/components/ui/button';
 import { Card } from '@/components/ui/card';
 import { getJobVideoUrl, getJobsList } from '@/lib/api';
 import type { Job } from '@/lib/types';
@@ -11,11 +12,61 @@ function isImage(job: Job): boolean {
   return job.output_path?.toLowerCase().endsWith('.png') ?? false;
 }
 
+function GalleryMedia({ job }: { job: Job }) {
+  const [failed, setFailed] = useState(false);
+
+  if (failed) {
+    return (
+      <div
+        role="status"
+        className="flex h-full flex-col items-center justify-center gap-2 px-4 text-center text-muted-foreground"
+      >
+        <ImageOff className="size-7" aria-hidden />
+        <span className="text-sm font-medium">Preview unavailable</span>
+        <span className="text-xs">
+          The generated file could not be loaded.
+        </span>
+      </div>
+    );
+  }
+
+  if (isImage(job)) {
+    return (
+      // eslint-disable-next-line @next/next/no-img-element
+      <img
+        src={getJobVideoUrl(job.id)}
+        alt={job.prompt}
+        className="block h-full w-full object-contain"
+        loading="lazy"
+        onError={() => setFailed(true)}
+      />
+    );
+  }
+
+  return (
+    <video
+      src={getJobVideoUrl(job.id)}
+      aria-label={
+        job.prompt ? `Generated video: ${job.prompt}` : 'Generated video'
+      }
+      className="block h-full w-full object-contain"
+      controls
+      muted
+      loop
+      playsInline
+      preload="metadata"
+      onError={() => setFailed(true)}
+    />
+  );
+}
+
 export default function GalleryPage() {
   const [jobs, setJobs] = useState<Job[]>([]);
   const [isLoading, setIsLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
 
+  const [reloadKey, setReloadKey] = useState(0);
+
   useEffect(() => {
     let cancelled = false;
     async function load() {
@@ -40,7 +91,13 @@ export default function GalleryPage() {
     return () => {
       cancelled = true;
     };
-  }, []);
+  }, [reloadKey]);
+
+  function retry() {
+    setError(null);
+    setIsLoading(true);
+    setReloadKey((k) => k + 1);
+  }
 
   const galleryJobs = jobs.filter(
     (j) =>
@@ -64,7 +121,16 @@ export default function GalleryPage() {
             <span>Loading gallery…</span>
           </div>
         ) : error ? (
-          <p className="py-8 text-destructive">{error}</p>
+          <div
+            role="alert"
+            className="flex flex-col items-center gap-3 py-8 text-center"
+          >
+            <AlertTriangle className="size-6 text-destructive" aria-hidden />
+            <p className="max-w-md text-sm text-muted-foreground">{error}</p>
+            <Button type="button" variant="outline" onClick={retry}>
+              Try Again
+            </Button>
+          </div>
         ) : galleryJobs.length === 0 ? (
           <p className="py-8 text-center text-muted-foreground">
             No completed videos yet
@@ -77,24 +143,7 @@ export default function GalleryPage() {
                 className="flex flex-col overflow-hidden rounded-lg border border-border bg-background"
               >
                 <div className="relative aspect-video overflow-hidden bg-muted">
-                  {isImage(job) ? (
-                    // eslint-disable-next-line @next/next/no-img-element
-                    <img
-                      src={getJobVideoUrl(job.id)}
-                      alt={job.prompt}
-                      className="block h-full w-full object-contain"
-                      loading="lazy"
-                    />
-                  ) : (
-                    <video
-                      src={getJobVideoUrl(job.id)}
-                      className="block h-full w-full object-contain"
-                      muted
-                      loop
-                      playsInline
-                      preload="metadata"
-                    />
-                  )}
+                  <GalleryMedia job={job} />
                 </div>
                 <p
                   className="line-clamp-3 border-t border-border px-4 py-3 text-sm text-muted-foreground"

apps/fastvideo_studio/src/app/globals.css

@@ -41,7 +41,7 @@
 
 	--border: #e2e8f0;
 	--input: #cbd5e1;
-	--ring: #94a3b8;
+	--ring: #1d4ed8;
 
 	--radius: 0.5rem;
 }
@@ -77,7 +77,7 @@
 
 	--border: #334155;
 	--input: #334155;
-	--ring: #cbd5e1;
+	--ring: #7dd3fc;
 }
 
 @theme inline {
@@ -125,6 +125,7 @@
 html,
 body {
 	min-height: 100%;
+	overflow-x: clip;
 }
 
 html {
@@ -163,6 +164,22 @@ a {
 	color: inherit;
 }
 
+:where(
+	a,
+	button,
+	input,
+	textarea,
+	select,
+	summary,
+	[role="button"],
+	[role="menuitem"],
+	[role="slider"],
+	[tabindex]
+):focus-visible {
+	outline: 3px solid var(--ring) !important;
+	outline-offset: 2px !important;
+}
+
 summary {
 	list-style: none;
 }

apps/fastvideo_studio/src/app/globals.test.ts

@@ -0,0 +1,55 @@
+import { readFileSync } from 'node:fs';
+import { join } from 'node:path';
+import { describe, expect, it } from 'vitest';
+
+const css = readFileSync(join(process.cwd(), 'src/app/globals.css'), 'utf8');
+
+function token(block: string, name: string): string {
+  const match = block.match(new RegExp(`--${name}:\\s*(#[0-9a-fA-F]{6})`));
+  if (!match) throw new Error(`Missing --${name} token`);
+  return match[1];
+}
+
+function luminance(hex: string): number {
+  const channels = hex
+    .slice(1)
+    .match(/.{2}/g)!
+    .map((channel) => parseInt(channel, 16) / 255)
+    .map((channel) =>
+      channel <= 0.04045
+        ? channel / 12.92
+        : ((channel + 0.055) / 1.055) ** 2.4,
+    );
+  return (
+    0.2126 * channels[0] + 0.7152 * channels[1] + 0.0722 * channels[2]
+  );
+}
+
+function contrast(first: string, second: string): number {
+  const firstLuminance = luminance(first);
+  const secondLuminance = luminance(second);
+  return (
+    (Math.max(firstLuminance, secondLuminance) + 0.05) /
+    (Math.min(firstLuminance, secondLuminance) + 0.05)
+  );
+}
+
+describe('global focus styles', () => {
+  it('keeps focus tokens above 3:1 against both page themes', () => {
+    const light = css.match(/:root\s*{([\s\S]*?)\n}/)?.[1] ?? '';
+    const dark = css.match(/\.dark\s*{([\s\S]*?)\n}/)?.[1] ?? '';
+
+    expect(contrast(token(light, 'ring'), token(light, 'background'))).toBeGreaterThanOrEqual(
+      3,
+    );
+    expect(contrast(token(dark, 'ring'), token(dark, 'background'))).toBeGreaterThanOrEqual(
+      3,
+    );
+  });
+
+  it('applies a non-animated three-pixel outline to focus-visible controls', () => {
+    expect(css).toContain('):focus-visible {');
+    expect(css).toContain('outline: 3px solid var(--ring) !important;');
+    expect(css).toContain('outline-offset: 2px !important;');
+  });
+});

apps/fastvideo_studio/src/app/gpus/page.tsx

@@ -4,8 +4,8 @@ import GpuGrid from '@/components/system/GpuGrid';
 
 export default function GpusPage() {
   return (
-    <main className="mx-auto flex w-full max-w-[1100px] flex-col gap-6 px-4 pb-12 pt-6">
+    <div className="mx-auto flex w-full max-w-[1100px] flex-col gap-6 px-4 pb-12 pt-6">
       <GpuGrid />
-    </main>
+    </div>
   );
 }

apps/fastvideo_studio/src/app/settings/page.test.tsx

@@ -52,6 +52,20 @@ describe('Settings page', () => {
     expect(updateOption).toHaveBeenCalledWith('numFrames', expect.any(Number));
   });
 
+  it('gives every slider an accessible name', () => {
+    renderPage();
+
+    const sliders = screen.getAllByRole('slider');
+    expect(sliders).toHaveLength(11);
+    for (const slider of sliders) {
+      expect(slider).toHaveAccessibleName();
+    }
+    expect(screen.getByRole('slider', { name: 'Frames' })).toBeInTheDocument();
+    expect(
+      screen.getByRole('slider', { name: 'Guidance Scale' }),
+    ).toBeInTheDocument();
+  });
+
   it('calls resetToDefaults when Reset to Defaults is clicked', () => {
     renderPage();
     fireEvent.click(screen.getByRole('button', { name: 'Reset to Defaults' }));

apps/fastvideo_studio/src/components/datasets/DatasetCard.test.tsx

@@ -25,6 +25,16 @@ beforeEach(() => {
 });
 
 describe('DatasetCard', () => {
+  it('keeps selection and delete buttons as semantic siblings', () => {
+    render(<DatasetCard dataset={dataset} onUpdated={() => {}} />);
+
+    const selectButton = screen.getByRole('button', { pressed: false });
+    const deleteButton = screen.getByRole('button', { name: 'Delete' });
+
+    expect(selectButton).toHaveTextContent('My Dataset');
+    expect(selectButton).not.toContainElement(deleteButton);
+  });
+
   it('renders the name, file count and human-readable size', () => {
     render(<DatasetCard dataset={dataset} onUpdated={() => {}} />);
     expect(screen.getByText('My Dataset')).toBeInTheDocument();
@@ -71,7 +81,7 @@ describe('DatasetCard', () => {
     expect(onSelect).not.toHaveBeenCalled();
   });
 
-  it('selects on keyboard activation of the card body but not of the Delete button', () => {
+  it('keeps the selection and delete actions separate', () => {
     const onSelect = vi.fn();
     render(
       <DatasetCard dataset={dataset} onUpdated={() => {}} onSelect={onSelect} />,
@@ -83,8 +93,12 @@ describe('DatasetCard', () => {
     });
     expect(onSelect).not.toHaveBeenCalled();
 
-    // Activating the card body itself does select.
-    fireEvent.keyDown(screen.getByText('My Dataset'), { key: 'Enter' });
+    // Activating the dedicated selection button selects the dataset.
+    fireEvent.click(
+      screen.getByRole('button', {
+        name: /My Dataset.*3 files.*2.0 KB/,
+      }),
+    );
     expect(onSelect).toHaveBeenCalledTimes(1);
   });
 

apps/fastvideo_studio/src/components/datasets/DatasetCard.tsx

@@ -55,43 +55,33 @@ export default function DatasetCard({
     }
   }
 
-  function handleKeyDown(e: React.KeyboardEvent) {
-    if ((e.target as HTMLElement).closest('button')) return;
-    if (e.key === 'Enter' || e.key === ' ') {
-      e.preventDefault();
-      onSelect();
-    }
-  }
-
   return (
-    <div
+    <article
       className={cn(
-        'mb-3 flex cursor-pointer flex-col gap-[0.6rem] rounded-lg border border-border bg-background px-[1.15rem] py-4',
+        'mb-3 flex items-start gap-3 rounded-lg border border-border bg-background px-[1.15rem] py-4',
         isSelected && 'border-accent-blue bg-accent-blue/5',
       )}
-      onClick={(e) => {
-        if ((e.target as HTMLElement).closest('button')) return;
-        onSelect();
-      }}
-      onKeyDown={handleKeyDown}
-      role="button"
-      tabIndex={0}
     >
-      <div className="flex flex-wrap items-center justify-between gap-2">
+      <button
+        type="button"
+        aria-pressed={isSelected}
+        onClick={onSelect}
+        className="flex min-w-0 flex-1 cursor-pointer flex-col gap-[0.6rem] rounded-md text-left"
+      >
         <span className="text-[0.95rem] font-semibold">{dataset.name}</span>
-        <Button
-          type="button"
-          variant="destructive"
-          size="sm"
-          onClick={handleDelete}
-          disabled={isLoading}
-        >
-          Delete
-        </Button>
-      </div>
-      <div className="text-sm text-muted-foreground">
-        {fileCount} {fileCount === 1 ? 'file' : 'files'} · {sizeLabel}
-      </div>
-    </div>
+        <span className="text-sm text-muted-foreground">
+          {fileCount} {fileCount === 1 ? 'file' : 'files'} · {sizeLabel}
+        </span>
+      </button>
+      <Button
+        type="button"
+        variant="destructive"
+        size="sm"
+        onClick={handleDelete}
+        disabled={isLoading}
+      >
+        Delete
+      </Button>
+    </article>
   );
 }

apps/fastvideo_studio/src/components/datasets/DatasetSidebar.test.tsx

@@ -6,6 +6,9 @@ import * as api from '@/lib/api';
 import type { Dataset } from '@/lib/api';
 
 vi.mock('@/lib/api');
+vi.mock('sonner', () => ({
+  toast: { error: vi.fn() },
+}));
 
 const mockedApi = vi.mocked(api);
 
@@ -27,6 +30,27 @@ beforeEach(() => {
 });
 
 describe('DatasetSidebar', () => {
+  it('fills the mobile viewport without reserving main-content width', async () => {
+    const onWidthChange = vi.fn();
+
+    render(
+      <DatasetSidebar
+        dataset={dataset}
+        isMobile
+        onClose={() => {}}
+        onWidthChange={onWidthChange}
+      />,
+    );
+
+    const drawer = screen.getByRole('dialog', {
+      name: 'My Dataset dataset details',
+    });
+    expect(drawer).toHaveStyle({ width: '100%', maxWidth: 'none' });
+    expect(drawer).toHaveAttribute('aria-modal', 'true');
+    expect(drawer).toHaveFocus();
+    expect(onWidthChange).toHaveBeenCalledWith(0);
+  });
+
   it('lists dataset files after loading', async () => {
     render(<DatasetSidebar dataset={dataset} onClose={() => {}} />);
 
@@ -43,6 +67,16 @@ describe('DatasetSidebar', () => {
     expect(mockedApi.getDatasetMediaUrl).toHaveBeenCalledWith('ds-1', 'b.mp4');
   });
 
+  it('shows a fallback when a dataset preview cannot load', async () => {
+    render(<DatasetSidebar dataset={dataset} onClose={() => {}} />);
+
+    const preview = await screen.findByLabelText('Preview of a.mp4');
+    fireEvent.error(preview);
+
+    expect(screen.getByText('Preview unavailable')).toBeInTheDocument();
+    expect(screen.queryByLabelText('Preview of a.mp4')).not.toBeInTheDocument();
+  });
+
   it('debounces caption save by 500ms', async () => {
     render(<DatasetSidebar dataset={dataset} onClose={() => {}} />);
     const textarea = await screen.findByDisplayValue('cap a');
@@ -99,6 +133,39 @@ describe('DatasetSidebar', () => {
     }
   });
 
+  it('shows a failed save and lets the user retry it', async () => {
+    vi.spyOn(console, 'error').mockImplementation(() => {});
+    mockedApi.updateDatasetCaption
+      .mockRejectedValueOnce(new Error('network down'))
+      .mockResolvedValueOnce(undefined);
+    render(<DatasetSidebar dataset={dataset} onClose={() => {}} />);
+    const textarea = await screen.findByDisplayValue('cap a');
+
+    vi.useFakeTimers();
+    try {
+      fireEvent.change(textarea, { target: { value: 'needs retry' } });
+      await act(async () => {
+        await vi.advanceTimersByTimeAsync(500);
+      });
+
+      expect(screen.getByText(/Not saved/)).toBeInTheDocument();
+      fireEvent.click(screen.getByRole('button', { name: 'Retry' }));
+      await act(async () => {
+        await Promise.resolve();
+      });
+
+      expect(mockedApi.updateDatasetCaption).toHaveBeenCalledTimes(2);
+      expect(mockedApi.updateDatasetCaption).toHaveBeenLastCalledWith(
+        'ds-1',
+        'a.mp4',
+        'needs retry',
+      );
+      expect(screen.getByText('Saved')).toBeInTheDocument();
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+
   it('debounces per file: editing another caption does not cancel a pending save', async () => {
     render(<DatasetSidebar dataset={dataset} onClose={() => {}} />);
     await screen.findByDisplayValue('cap a');

apps/fastvideo_studio/src/components/datasets/DatasetSidebar.tsx

@@ -1,7 +1,8 @@
 'use client';
 
 import * as React from 'react';
-import { X } from 'lucide-react';
+import { ImageOff, X } from 'lucide-react';
+import { toast } from 'sonner';
 
 import DownloadCaptions from '@/components/datasets/DownloadCaptions';
 import { Textarea } from '@/components/ui/textarea';
@@ -13,12 +14,14 @@ import {
   type Dataset,
 } from '@/lib/api';
 import { cn } from '@/lib/utils';
+import { useDrawerFocus } from '@/hooks/useDrawerFocus';
 
 const SIDEBAR_MIN_WIDTH = 320;
 const SIDEBAR_MAX_WIDTH = 900;
 const INITIAL_PAGE_SIZE = 24;
 const PAGE_SIZE = 24;
 const SCROLL_THRESHOLD = 200;
+type CaptionSaveState = 'idle' | 'saving' | 'saved' | 'error';
 
 // Memoized so a caption keystroke re-renders only the edited card, not every
 // visible <video> in the grid (visibleCount grows unbounded with scrolling).
@@ -27,54 +30,101 @@ const DatasetFileCard = React.memo(function DatasetFileCard({
   mediaUrl,
   caption,
   thumbLoaded,
+  saveState,
   onCaptionChange,
+  onCaptionRetry,
   onThumbLoaded,
 }: {
   fileName: string;
   mediaUrl: string;
   caption: string;
   thumbLoaded: boolean;
+  saveState: CaptionSaveState;
   onCaptionChange: (fileName: string, value: string) => void;
+  onCaptionRetry: (fileName: string, value: string) => void;
   onThumbLoaded: (fileName: string) => void;
 }) {
+  const [mediaFailed, setMediaFailed] = React.useState(false);
+
+  React.useEffect(() => {
+    setMediaFailed(false);
+  }, [mediaUrl]);
+
   return (
     <div className="relative flex flex-col overflow-hidden rounded-lg border border-border bg-background">
-      {!thumbLoaded && (
+      {!thumbLoaded && !mediaFailed && (
         <div className="pointer-events-none absolute inset-0 flex items-center justify-center bg-background/70">
           <div className="h-6 w-6 animate-spin rounded-full border-2 border-muted-foreground/40 border-t-accent-blue" />
         </div>
       )}
-      {/* eslint-disable-next-line jsx-a11y/media-has-caption */}
-      <video
-        src={mediaUrl}
-        className="aspect-video w-full bg-border object-cover"
-        muted
-        autoPlay
-        loop
-        playsInline
-        onLoadedData={() => onThumbLoaded(fileName)}
-        onError={() => onThumbLoaded(fileName)}
-      />
+      {mediaFailed ? (
+        <div
+          role="status"
+          className="flex aspect-video w-full flex-col items-center justify-center gap-1 bg-muted px-2 text-center text-muted-foreground"
+        >
+          <ImageOff className="size-5" aria-hidden />
+          <span className="text-xs">Preview unavailable</span>
+        </div>
+      ) : (
+        // eslint-disable-next-line jsx-a11y/media-has-caption
+        <video
+          src={mediaUrl}
+          aria-label={`Preview of ${fileName}`}
+          className="aspect-video w-full bg-border object-cover"
+          muted
+          autoPlay
+          loop
+          playsInline
+          onLoadedData={() => onThumbLoaded(fileName)}
+          onError={() => {
+            setMediaFailed(true);
+            onThumbLoaded(fileName);
+          }}
+        />
+      )}
       <Textarea
+        aria-label={`Caption for ${fileName}`}
         value={caption}
         onChange={(e) => onCaptionChange(fileName, e.target.value)}
         placeholder="Caption"
         rows={2}
         className="min-h-[2.5rem] resize-y rounded-none border-0 bg-transparent p-1.5 text-xs shadow-none focus-visible:border-transparent focus-visible:ring-0"
       />
+      <div
+        aria-live="polite"
+        className="flex min-h-6 items-center px-1.5 pb-1 text-[0.7rem] text-muted-foreground"
+      >
+        {saveState === 'saving' && <span>Saving…</span>}
+        {saveState === 'saved' && <span>Saved</span>}
+        {saveState === 'error' && (
+          <span role="alert" className="text-destructive">
+            Not saved.{' '}
+            <button
+              type="button"
+              onClick={() => onCaptionRetry(fileName, caption)}
+              className="inline-flex min-h-11 items-center font-medium underline underline-offset-2"
+            >
+              Retry
+            </button>
+          </span>
+        )}
+      </div>
     </div>
   );
 });
 
 export default function DatasetSidebar({
   dataset,
+  isMobile = false,
   onClose,
   onWidthChange,
 }: {
   dataset: Dataset;
+  isMobile?: boolean;
   onClose: () => void;
   onWidthChange?: (w: number) => void;
 }) {
+  const drawerRef = useDrawerFocus<HTMLElement>(isMobile);
   const [width, setWidth] = React.useState(400);
   const [isDragging, setIsDragging] = React.useState(false);
   const [fileNames, setFileNames] = React.useState<string[]>([]);
@@ -84,17 +134,21 @@ export default function DatasetSidebar({
   const [thumbLoaded, setThumbLoaded] = React.useState<
     Record<string, boolean>
   >({});
+  const [captionSaveStates, setCaptionSaveStates] = React.useState<
+    Record<string, CaptionSaveState>
+  >({});
 
   // Pending debounced caption saves, keyed per file so editing one caption
   // can't cancel another file's pending save.
   const pendingSaves = React.useRef(
     new Map<string, { timer: ReturnType<typeof setTimeout>; save: () => void }>(),
   );
+  const captionVersions = React.useRef(new Map<string, number>());
   const scrollRef = React.useRef<HTMLDivElement>(null);
 
   React.useEffect(() => {
-    onWidthChange?.(width);
-  }, [width, onWidthChange]);
+    onWidthChange?.(isMobile ? 0 : width);
+  }, [isMobile, width, onWidthChange]);
 
   React.useEffect(() => {
     let cancelled = false;
@@ -106,6 +160,8 @@ export default function DatasetSidebar({
         setCaptions(data.captions);
         setVisibleCount(INITIAL_PAGE_SIZE);
         setThumbLoaded({});
+        setCaptionSaveStates({});
+        captionVersions.current.clear();
       })
       .catch((err) => console.error('Failed to load dataset files:', err))
       .finally(() => {
@@ -138,23 +194,51 @@ export default function DatasetSidebar({
   });
 
   const datasetId = dataset.id;
+  const persistCaption = React.useCallback(
+    (fileName: string, value: string, version: number) => {
+      setCaptionSaveStates((prev) => ({ ...prev, [fileName]: 'saving' }));
+      void updateDatasetCaption(datasetId, fileName, value)
+        .then(() => {
+          if (captionVersions.current.get(fileName) !== version) return;
+          setCaptionSaveStates((prev) => ({ ...prev, [fileName]: 'saved' }));
+        })
+        .catch((error) => {
+          if (captionVersions.current.get(fileName) !== version) return;
+          console.error('Failed to save caption:', error);
+          setCaptionSaveStates((prev) => ({ ...prev, [fileName]: 'error' }));
+          toast.error('Caption was not saved', {
+            description: `${fileName}: check the Studio API, then retry.`,
+          });
+        });
+    },
+    [datasetId],
+  );
+
   const handleCaptionChange = React.useCallback(
     (fileName: string, value: string) => {
       setCaptions((prev) => ({ ...prev, [fileName]: value }));
+      setCaptionSaveStates((prev) => ({ ...prev, [fileName]: 'idle' }));
       const pending = pendingSaves.current.get(fileName);
       if (pending) clearTimeout(pending.timer);
-      const save = () => {
-        updateDatasetCaption(datasetId, fileName, value).catch((err) =>
-          console.error('Failed to save caption:', err),
-        );
-      };
+      const version = (captionVersions.current.get(fileName) ?? 0) + 1;
+      captionVersions.current.set(fileName, version);
+      const save = () => persistCaption(fileName, value, version);
       const timer = setTimeout(() => {
         pendingSaves.current.delete(fileName);
         save();
       }, 500);
       pendingSaves.current.set(fileName, { timer, save });
     },
-    [datasetId],
+    [persistCaption],
+  );
+
+  const handleCaptionRetry = React.useCallback(
+    (fileName: string, value: string) => {
+      const version = (captionVersions.current.get(fileName) ?? 0) + 1;
+      captionVersions.current.set(fileName, version);
+      persistCaption(fileName, value, version);
+    },
+    [persistCaption],
   );
 
   function handleScroll() {
@@ -189,8 +273,16 @@ export default function DatasetSidebar({
 
   return (
     <aside
-      className="fixed bottom-0 right-0 top-[var(--header-height)] z-50 flex max-h-[calc(100vh-var(--header-height))] min-w-[320px] shrink-0 flex-col border-l border-border bg-card"
-      style={{ width, maxWidth: SIDEBAR_MAX_WIDTH }}
+      ref={drawerRef}
+      tabIndex={-1}
+      role="dialog"
+      aria-label={`${dataset.name} dataset details`}
+      aria-modal={isMobile || undefined}
+      className="fixed bottom-0 right-0 top-[var(--header-height)] z-50 flex max-h-[calc(100dvh-var(--header-height))] min-w-0 shrink-0 flex-col border-l border-border bg-card md:min-w-[320px]"
+      style={{
+        width: isMobile ? '100%' : width,
+        maxWidth: isMobile ? 'none' : SIDEBAR_MAX_WIDTH,
+      }}
     >
       <div className="flex shrink-0 items-center justify-between border-b border-border px-5 py-4">
         <h2 className="m-0 min-w-0 truncate text-base font-semibold text-foreground">
@@ -203,7 +295,7 @@ export default function DatasetSidebar({
             onClick={onClose}
             title="Close"
             aria-label="Close"
-            className="flex items-center justify-center rounded-lg p-1.5 text-muted-foreground transition-colors hover:bg-accent hover:text-foreground"
+            className="flex size-11 items-center justify-center rounded-lg text-muted-foreground transition-colors hover:bg-accent hover:text-foreground"
           >
             <X className="h-[18px] w-[18px]" />
           </button>
@@ -231,7 +323,9 @@ export default function DatasetSidebar({
                   mediaUrl={getDatasetMediaUrl(dataset.id, fileName)}
                   caption={captions[fileName] ?? ''}
                   thumbLoaded={!!thumbLoaded[fileName]}
+                  saveState={captionSaveStates[fileName] ?? 'idle'}
                   onCaptionChange={handleCaptionChange}
+                  onCaptionRetry={handleCaptionRetry}
                   onThumbLoaded={markThumbLoaded}
                 />
               ))}
@@ -240,14 +334,14 @@ export default function DatasetSidebar({
         </div>
       </div>
 
-      <div
+      {!isMobile && <div
         role="presentation"
         onMouseDown={onMouseDown}
         className={cn(
           'absolute bottom-0 left-0 top-0 z-[1] w-1.5 cursor-col-resize hover:bg-accent-blue/25',
           isDragging && 'bg-accent-blue/25',
         )}
-      />
+      />}
     </aside>
   );
 }

apps/fastvideo_studio/src/components/datasets/DownloadCaptions.tsx

@@ -6,7 +6,7 @@ import { Button } from '@/components/ui/button';
 import { downloadBlob } from '@/lib/utils';
 
 const MENU_ITEM =
-  'block w-full cursor-pointer px-4 py-2 text-left text-sm font-medium text-foreground transition-colors hover:bg-muted disabled:cursor-not-allowed disabled:opacity-50';
+  'block min-h-11 w-full cursor-pointer px-4 py-2 text-left text-sm font-medium text-foreground transition-colors hover:bg-muted disabled:cursor-not-allowed disabled:opacity-50';
 
 export default function DownloadCaptions({
   fileNames,

apps/fastvideo_studio/src/components/jobs/CreateJobButton.test.tsx

@@ -0,0 +1,53 @@
+import { render, screen } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { describe, expect, it, vi } from 'vitest';
+
+import CreateJobButton from './CreateJobButton';
+
+vi.mock('./CreateJobModal', () => ({
+  default: ({
+    isOpen,
+    workloadType,
+  }: {
+    isOpen: boolean;
+    workloadType: string;
+  }) =>
+    isOpen ? (
+      <div role="dialog" data-workload-type={workloadType}>
+        Create job form
+      </div>
+    ) : null,
+}));
+
+describe('CreateJobButton', () => {
+  it('opens the workload menu on click and selects an item', async () => {
+    const user = userEvent.setup();
+    render(<CreateJobButton jobType="inference" />);
+
+    await user.click(screen.getByRole('button', { name: 'Create Job' }));
+    await user.click(screen.getByRole('menuitem', { name: /I2V/i }));
+
+    expect(screen.getByRole('dialog')).toHaveAttribute(
+      'data-workload-type',
+      'i2v',
+    );
+  });
+
+  it('opens and operates the workload menu from the keyboard', async () => {
+    const user = userEvent.setup();
+    render(<CreateJobButton jobType="inference" />);
+
+    const trigger = screen.getByRole('button', { name: 'Create Job' });
+    trigger.focus();
+    await user.keyboard('{Enter}');
+
+    const firstItem = await screen.findByRole('menuitem', { name: /T2V/i });
+    expect(firstItem).toHaveFocus();
+    await user.keyboard('{Enter}');
+
+    expect(screen.getByRole('dialog')).toHaveAttribute(
+      'data-workload-type',
+      't2v',
+    );
+  });
+});

apps/fastvideo_studio/src/components/jobs/CreateJobButton.tsx

@@ -2,6 +2,7 @@
 
 import * as React from 'react';
 import { ChevronDown } from 'lucide-react';
+import * as DropdownMenu from '@radix-ui/react-dropdown-menu';
 
 import CreateJobModal from '@/components/jobs/CreateJobModal';
 import { Button } from '@/components/ui/button';
@@ -33,31 +34,35 @@ export default function CreateJobButton({ jobType }: CreateJobButtonProps) {
 
   return (
     <>
-      <div className="group relative inline-block">
-        <Button type="button" className="gap-1.5">
-          Create Job
-          <ChevronDown className="size-3.5 opacity-85" aria-hidden />
-        </Button>
-        <div
-          role="menu"
-          className="invisible absolute right-0 top-full z-[200] mt-1 min-w-full -translate-y-1 rounded-lg border border-border bg-popover py-1 opacity-0 shadow-lg transition-all duration-150 group-hover:visible group-hover:translate-y-0 group-hover:opacity-100"
-        >
-          {options.map((opt) => (
-            <button
-              key={opt.type}
-              type="button"
-              role="menuitem"
-              onClick={() => openModal(opt.type)}
-              className="block w-full whitespace-nowrap px-4 py-2 text-left text-sm font-medium text-popover-foreground transition-colors hover:bg-secondary"
-            >
-              {opt.label}
-              <span className="mt-0.5 block text-xs font-normal text-muted-foreground">
-                {opt.desc}
-              </span>
-            </button>
-          ))}
-        </div>
-      </div>
+      <DropdownMenu.Root>
+        <DropdownMenu.Trigger asChild>
+          <Button type="button" className="gap-1.5">
+            Create Job
+            <ChevronDown className="size-3.5 opacity-85" aria-hidden />
+          </Button>
+        </DropdownMenu.Trigger>
+        <DropdownMenu.Portal>
+          <DropdownMenu.Content
+            align="end"
+            sideOffset={4}
+            collisionPadding={8}
+            className="z-[200] min-w-48 overflow-hidden rounded-lg border border-border bg-popover py-1 text-popover-foreground shadow-lg"
+          >
+            {options.map((opt) => (
+              <DropdownMenu.Item
+                key={opt.type}
+                onSelect={() => openModal(opt.type)}
+                className="flex min-h-11 cursor-pointer select-none flex-col justify-center px-4 py-2 text-left text-sm font-medium outline-none data-[highlighted]:bg-secondary"
+              >
+                {opt.label}
+                <span className="mt-0.5 block text-xs font-normal text-muted-foreground">
+                  {opt.desc}
+                </span>
+              </DropdownMenu.Item>
+            ))}
+          </DropdownMenu.Content>
+        </DropdownMenu.Portal>
+      </DropdownMenu.Root>
       <CreateJobModal
         isOpen={modalOpen}
         onClose={() => setModalOpen(false)}

apps/fastvideo_studio/src/components/jobs/CreateJobModal.test.tsx

@@ -50,6 +50,57 @@ function renderModal(
 }
 
 describe('CreateJobModal', () => {
+  it('shows a model loading error instead of an empty model list', async () => {
+    vi.spyOn(console, 'error').mockImplementation(() => {});
+    vi.mocked(getModels).mockRejectedValueOnce(new Error('network down'));
+
+    renderModal();
+
+    expect(
+      await screen.findByText(/Models could not be loaded/),
+    ).toBeInTheDocument();
+    expect(screen.getByLabelText('Model')).toHaveAttribute(
+      'aria-invalid',
+      'true',
+    );
+  });
+
+  it('keeps the form open and reports job creation failures', async () => {
+    vi.spyOn(console, 'error').mockImplementation(() => {});
+    vi.mocked(createJob).mockRejectedValueOnce(new Error('API rejected job'));
+    const user = userEvent.setup();
+    const { onClose, onSuccess } = renderModal();
+
+    await screen.findByRole('option', { name: 'Wan T2V (wan/t2v-1.3b)' });
+    await user.type(screen.getByLabelText('Prompt'), 'a careful test prompt');
+    await user.click(screen.getByRole('button', { name: 'Create Job' }));
+
+    expect(
+      await screen.findByText(/API rejected job.*then try again/),
+    ).toBeInTheDocument();
+    expect(onSuccess).not.toHaveBeenCalled();
+    expect(onClose).not.toHaveBeenCalled();
+  });
+
+  it('reports image upload failures next to the file input', async () => {
+    vi.spyOn(console, 'error').mockImplementation(() => {});
+    vi.mocked(uploadImage).mockRejectedValueOnce(new Error('Upload failed'));
+    const user = userEvent.setup();
+    renderModal({ workloadType: 'i2v' });
+
+    await screen.findByRole('option', { name: 'Wan T2V (wan/t2v-1.3b)' });
+    const input = screen.getByLabelText('Image');
+    await user.upload(
+      input,
+      new File(['image'], 'input.png', { type: 'image/png' }),
+    );
+
+    expect(
+      await screen.findByText(/Upload failed.*Choose the image again/),
+    ).toBeInTheDocument();
+    expect(input).toHaveAttribute('aria-invalid', 'true');
+  });
+
   it('renders the form fields for an inference job', async () => {
     renderModal();
 

apps/fastvideo_studio/src/components/jobs/CreateJobModal.tsx

@@ -103,6 +103,17 @@ export default function CreateJobModal({
   const [fakeScoreModelPath, setFakeScoreModelPath] = React.useState('');
   const [isSubmitting, setIsSubmitting] = React.useState(false);
   const [isLoadingModels, setIsLoadingModels] = React.useState(false);
+  const [isLoadingDatasets, setIsLoadingDatasets] = React.useState(false);
+  const [modelLoadError, setModelLoadError] = React.useState<string | null>(
+    null,
+  );
+  const [datasetLoadError, setDatasetLoadError] = React.useState<string | null>(
+    null,
+  );
+  const [imageUploadError, setImageUploadError] = React.useState<string | null>(
+    null,
+  );
+  const [submitError, setSubmitError] = React.useState<string | null>(null);
   const imageInputRef = React.useRef<HTMLInputElement>(null);
 
   // Seed field values from the persisted default options each time the modal
@@ -144,6 +155,10 @@ export default function CreateJobModal({
     setImageFileName('');
     setSelectedDatasetId('');
     setSelectedValidationDatasetId('');
+    setModelLoadError(null);
+    setDatasetLoadError(null);
+    setImageUploadError(null);
+    setSubmitError(null);
     if (workloadType === 'dmd_t2v') {
       setDmdUseVsa(false);
       setDmdVsaSparsity(0.8);
@@ -162,6 +177,7 @@ export default function CreateJobModal({
     // can't overwrite the current workload's model list/selection.
     let stale = false;
     setIsLoadingModels(true);
+    setModelLoadError(null);
     getModels(inferenceWorkload)
       .then((list) => {
         if (stale) return;
@@ -180,7 +196,13 @@ export default function CreateJobModal({
         }
       })
       .catch((e) => {
-        if (!stale) console.error('Failed to load models:', e);
+        if (stale) return;
+        console.error('Failed to load models:', e);
+        setModels([]);
+        setModelId('');
+        setModelLoadError(
+          'Models could not be loaded. Check the Studio API and reopen this form to try again.',
+        );
       })
       .finally(() => {
         if (!stale) setIsLoadingModels(false);
@@ -193,11 +215,22 @@ export default function CreateJobModal({
   // Training jobs need a dataset; load the ready datasets when relevant.
   React.useEffect(() => {
     if (isOpen && !isInference) {
+      setIsLoadingDatasets(true);
+      setDatasetLoadError(null);
       getDatasets()
         .then(setReadyDatasets)
-        .catch(() => setReadyDatasets([]));
+        .catch((error) => {
+          console.error('Failed to load datasets:', error);
+          setReadyDatasets([]);
+          setDatasetLoadError(
+            'Datasets could not be loaded. Check the Studio API and reopen this form to try again.',
+          );
+        })
+        .finally(() => setIsLoadingDatasets(false));
     } else {
       setReadyDatasets([]);
+      setIsLoadingDatasets(false);
+      setDatasetLoadError(null);
     }
   }, [isOpen, isInference]);
 
@@ -206,16 +239,24 @@ export default function CreateJobModal({
     if (!file) {
       setImagePath('');
       setImageFileName('');
+      setImageUploadError(null);
       return;
     }
     setIsUploadingImage(true);
     setImageFileName(file.name);
+    setImageUploadError(null);
     try {
       const { path } = await uploadImage(file);
       setImagePath(path);
-    } catch {
+    } catch (error) {
+      console.error('Failed to upload image:', error);
       setImagePath('');
       setImageFileName('');
+      setImageUploadError(
+        error instanceof Error
+          ? `${error.message}. Choose the image again to retry.`
+          : 'The image could not be uploaded. Choose it again to retry.',
+      );
     } finally {
       setIsUploadingImage(false);
     }
@@ -224,6 +265,7 @@ export default function CreateJobModal({
   function clearImage() {
     setImagePath('');
     setImageFileName('');
+    setImageUploadError(null);
     if (imageInputRef.current) imageInputRef.current.value = '';
   }
 
@@ -239,6 +281,7 @@ export default function CreateJobModal({
       workloadType === 'lora_t2v' ? 'lora' : jobType
     ) as JobType;
     setIsSubmitting(true);
+    setSubmitError(null);
     try {
       const payload: CreateJobRequest = {
         model_id: modelId,
@@ -296,6 +339,11 @@ export default function CreateJobModal({
       onClose();
     } catch (err) {
       console.error('Failed to create job:', err);
+      setSubmitError(
+        err instanceof Error
+          ? `${err.message}. Check the form and Studio API, then try again.`
+          : 'The job could not be created. Check the form and Studio API, then try again.',
+      );
     } finally {
       setIsSubmitting(false);
     }
@@ -343,7 +391,11 @@ export default function CreateJobModal({
               value={modelId}
               onChange={(e) => setModelId(e.target.value)}
               required
-              disabled={isSubmitting || isLoadingModels}
+              aria-describedby={
+                modelLoadError ? 'modal-model-error' : undefined
+              }
+              aria-invalid={modelLoadError ? true : undefined}
+              disabled={isSubmitting || isLoadingModels || !!modelLoadError}
             >
               <option value="" disabled>
                 {isLoadingModels
@@ -358,6 +410,15 @@ export default function CreateJobModal({
                 </option>
               ))}
             </NativeSelect>
+            {modelLoadError && (
+              <p
+                id="modal-model-error"
+                role="alert"
+                className="text-sm text-destructive"
+              >
+                {modelLoadError}
+              </p>
+            )}
           </FieldRow>
 
           {isInference && workloadType === 'i2v' && (
@@ -369,6 +430,10 @@ export default function CreateJobModal({
                 accept=".png,.jpg,.jpeg,.webp,.bmp"
                 onChange={handleImageChange}
                 disabled={isSubmitting || isUploadingImage}
+                aria-describedby={
+                  imageUploadError ? 'modal-image-error' : undefined
+                }
+                aria-invalid={imageUploadError ? true : undefined}
                 required
                 className="h-auto py-2 file:mr-3 file:cursor-pointer file:rounded-md file:border-0 file:bg-secondary file:px-2 file:py-1 file:text-sm file:text-secondary-foreground"
               />
@@ -385,6 +450,15 @@ export default function CreateJobModal({
                   </button>
                 </span>
               )}
+              {imageUploadError && (
+                <p
+                  id="modal-image-error"
+                  role="alert"
+                  className="text-sm text-destructive"
+                >
+                  {imageUploadError}
+                </p>
+              )}
             </FieldRow>
           )}
 
@@ -432,12 +506,22 @@ export default function CreateJobModal({
                     id="modal-dataset"
                     value={selectedDatasetId}
                     onChange={(e) => setSelectedDatasetId(e.target.value)}
-                    disabled={isSubmitting}
+                    aria-describedby={
+                      datasetLoadError ? 'modal-dataset-error' : undefined
+                    }
+                    aria-invalid={datasetLoadError ? true : undefined}
+                    disabled={
+                      isSubmitting || isLoadingDatasets || !!datasetLoadError
+                    }
                   >
                     <option value="" disabled>
-                      {readyDatasets.length === 0
-                        ? 'No datasets (add in Datasets tab)'
-                        : 'Select a dataset…'}
+                      {isLoadingDatasets
+                        ? 'Loading datasets…'
+                        : datasetLoadError
+                          ? 'Datasets unavailable'
+                          : readyDatasets.length === 0
+                            ? 'No datasets (add in Datasets tab)'
+                            : 'Select a dataset…'}
                     </option>
                     {readyDatasets.map((d) => (
                       <option key={d.id} value={d.id}>
@@ -445,6 +529,15 @@ export default function CreateJobModal({
                       </option>
                     ))}
                   </NativeSelect>
+                  {datasetLoadError && (
+                    <p
+                      id="modal-dataset-error"
+                      role="alert"
+                      className="text-sm text-destructive"
+                    >
+                      {datasetLoadError}
+                    </p>
+                  )}
                 </FieldRow>
                 <FieldRow
                   htmlFor="modal-validation-dataset"
@@ -457,7 +550,9 @@ export default function CreateJobModal({
                     onChange={(e) =>
                       setSelectedValidationDatasetId(e.target.value)
                     }
-                    disabled={isSubmitting}
+                    disabled={
+                      isSubmitting || isLoadingDatasets || !!datasetLoadError
+                    }
                   >
                     <option value="">None</option>
                     {readyDatasets.map((d) => (
@@ -811,9 +906,22 @@ export default function CreateJobModal({
             </details>
           )}
 
-          <div>
-            <Button type="submit" disabled={isSubmitting}>
-              {isSubmitting ? 'Creating...' : 'Create Job'}
+          <div className="flex flex-col items-start gap-2">
+            {submitError && (
+              <p role="alert" className="text-sm text-destructive">
+                {submitError}
+              </p>
+            )}
+            <Button
+              type="submit"
+              disabled={
+                isSubmitting ||
+                isUploadingImage ||
+                !!modelLoadError ||
+                !!datasetLoadError
+              }
+            >
+              {isSubmitting ? 'Creating…' : 'Create Job'}
             </Button>
           </div>
         </form>

apps/fastvideo_studio/src/components/jobs/JobCard.test.tsx

@@ -20,6 +20,14 @@ vi.mock('@/lib/api', () => ({
   downloadJobVideo: vi.fn(),
 }));
 
+vi.mock('@/lib/utils', async (importOriginal) => {
+  const actual = await importOriginal<typeof import('@/lib/utils')>();
+  return {
+    ...actual,
+    downloadBlob: vi.fn(),
+  };
+});
+
 const makeJob = (overrides: Partial<Job> = {}): Job =>
   makeBaseJob({
     model_id: 'Wan2.1-T2V',
@@ -46,6 +54,16 @@ beforeEach(() => {
 });
 
 describe('JobCard', () => {
+  it('keeps selection and job action buttons as semantic siblings', () => {
+    render(<JobCard job={makeJob()} />);
+
+    const selectButton = screen.getByRole('button', { pressed: false });
+    const deleteButton = screen.getByRole('button', { name: 'Delete' });
+
+    expect(selectButton).toHaveTextContent('Wan2.1-T2V');
+    expect(selectButton).not.toContainElement(deleteButton);
+  });
+
   it('renders the model, prompt, status and inference meta', () => {
     render(<JobCard job={makeJob()} />);
     expect(screen.getByText('Wan2.1-T2V')).toBeInTheDocument();

apps/fastvideo_studio/src/components/jobs/JobCard.tsx

@@ -119,18 +119,10 @@ export default function JobCard({ job, onJobUpdated }: JobCardProps) {
     }
   }
 
-  function handleSelectJob(e: React.MouseEvent | React.KeyboardEvent) {
-    if ((e.target as HTMLElement).closest('button')) return;
+  function handleSelectJob() {
     setActiveJobId(isSelected ? null : job.id);
   }
 
-  function handleKeyDown(e: React.KeyboardEvent) {
-    if (e.key === 'Enter' || e.key === ' ') {
-      e.preventDefault();
-      handleSelectJob(e);
-    }
-  }
-
   async function handleDownloadVideo(e: React.MouseEvent) {
     e.preventDefault();
     e.stopPropagation();
@@ -148,11 +140,7 @@ export default function JobCard({ job, onJobUpdated }: JobCardProps) {
   }
 
   return (
-    <div
-      role="button"
-      tabIndex={0}
-      onClick={handleSelectJob}
-      onKeyDown={handleKeyDown}
+    <article
       className={cn(
         'mb-3 flex cursor-pointer flex-col gap-2.5 rounded-lg border bg-background p-4 transition-colors last:mb-0',
         isSelected
@@ -160,35 +148,42 @@ export default function JobCard({ job, onJobUpdated }: JobCardProps) {
           : 'border-border hover:border-muted-foreground/40',
       )}
     >
-      <div className="flex flex-wrap items-center justify-between gap-2">
-        <span className="text-[0.95rem] font-semibold text-foreground">
-          {job.model_id}
-        </span>
-        <Badge variant={BADGE_VARIANTS[job.status] ?? 'secondary'}>
-          {job.status}
-        </Badge>
-      </div>
-      <p className="max-w-full overflow-hidden text-ellipsis whitespace-nowrap text-sm text-muted-foreground">
-        {job.prompt}
-      </p>
-      <div className="flex flex-wrap items-center gap-4 text-xs text-muted-foreground">
-        {job.job_type === 'inference' ? (
-          <>
-            <span>{job.num_frames} frames</span>
-            <span>
-              {job.height}×{job.width}
-            </span>
-          </>
-        ) : (
-          <span>{job.workload_type?.replace(/_/g, ' ') ?? job.job_type}</span>
-        )}
-        {elapsedTime && (
-          <span className="inline-flex items-center gap-1">
-            <Timer className="size-3.5" aria-hidden />
-            {elapsedTime}
+      <button
+        type="button"
+        aria-pressed={isSelected}
+        onClick={handleSelectJob}
+        className="flex w-full flex-col gap-2.5 rounded-md text-left"
+      >
+        <span className="flex flex-wrap items-center justify-between gap-2">
+          <span className="text-[0.95rem] font-semibold text-foreground">
+            {job.model_id}
           </span>
-        )}
-      </div>
+          <Badge variant={BADGE_VARIANTS[job.status] ?? 'secondary'}>
+            {job.status}
+          </Badge>
+        </span>
+        <span className="max-w-full overflow-hidden text-ellipsis whitespace-nowrap text-sm text-muted-foreground">
+          {job.prompt}
+        </span>
+        <span className="flex flex-wrap items-center gap-4 text-xs text-muted-foreground">
+          {job.job_type === 'inference' ? (
+            <>
+              <span>{job.num_frames} frames</span>
+              <span>
+                {job.height}×{job.width}
+              </span>
+            </>
+          ) : (
+            <span>{job.workload_type?.replace(/_/g, ' ') ?? job.job_type}</span>
+          )}
+          {elapsedTime && (
+            <span className="inline-flex items-center gap-1">
+              <Timer className="size-3.5" aria-hidden />
+              {elapsedTime}
+            </span>
+          )}
+        </span>
+      </button>
       <div className="flex flex-wrap items-center gap-1.5">
         {job.status === 'running' ? (
           <Button
@@ -240,6 +235,6 @@ export default function JobCard({ job, onJobUpdated }: JobCardProps) {
           Delete
         </Button>
       </div>
-    </div>
+    </article>
   );
 }

apps/fastvideo_studio/src/components/jobs/JobDetailsSidebar.test.tsx

@@ -19,6 +19,32 @@ const makeJob = (overrides: Partial<Job> = {}): Job =>
   });
 
 describe('JobDetailsSidebar', () => {
+  it('fills the mobile viewport without reserving main-content width', async () => {
+    vi.mocked(getJobLogs).mockResolvedValue({
+      lines: [],
+      total: 0,
+      progress: 0,
+      progress_msg: '',
+      phase: '',
+    });
+    const onWidthChange = vi.fn();
+
+    render(
+      <JobDetailsSidebar
+        job={makeJob({ status: 'completed' })}
+        isMobile
+        onClose={vi.fn()}
+        onWidthChange={onWidthChange}
+      />,
+    );
+
+    const drawer = screen.getByRole('dialog', { name: 'Job details' });
+    expect(drawer).toHaveStyle({ width: '100%', maxWidth: 'none' });
+    expect(drawer).toHaveAttribute('aria-modal', 'true');
+    expect(drawer).toHaveFocus();
+    expect(onWidthChange).toHaveBeenCalledWith(0);
+  });
+
   it('renders log lines streamed from the job log poll', async () => {
     vi.mocked(getJobLogs).mockResolvedValue({
       lines: ['boot sequence started', 'loading model weights'],

apps/fastvideo_studio/src/components/jobs/JobDetailsSidebar.tsx

@@ -4,6 +4,7 @@ import * as React from 'react';
 import { X } from 'lucide-react';
 
 import { Button } from '@/components/ui/button';
+import { useDrawerFocus } from '@/hooks/useDrawerFocus';
 import { useResizable } from '@/hooks/useResizable';
 import { downloadJobLog, getJobLogs } from '@/lib/api';
 import type { Job } from '@/lib/types';
@@ -15,13 +16,16 @@ const POLL_INTERVAL_MS = 2000;
 
 export default function JobDetailsSidebar({
   job,
+  isMobile = false,
   onClose,
   onWidthChange,
 }: {
   job: Job;
+  isMobile?: boolean;
   onClose: () => void;
   onWidthChange?: (w: number) => void;
 }) {
+  const drawerRef = useDrawerFocus<HTMLElement>(isMobile);
   const [width, setWidth] = React.useState(360);
   const [isDragging, setIsDragging] = React.useState(false);
   const [isLoading, setIsLoading] = React.useState(false);
@@ -53,8 +57,8 @@ export default function JobDetailsSidebar({
   });
 
   React.useEffect(() => {
-    onWidthChange?.(width);
-  }, [width, onWidthChange]);
+    onWidthChange?.(isMobile ? 0 : width);
+  }, [isMobile, width, onWidthChange]);
 
   // Auto-scroll the console to the bottom whenever new lines land. Runs after
   // commit so scrollHeight reflects the freshly-rendered output.
@@ -137,8 +141,16 @@ export default function JobDetailsSidebar({
 
   return (
     <aside
-      className="fixed bottom-0 right-0 top-[var(--header-height)] z-50 flex max-h-[calc(100vh-var(--header-height))] min-w-[280px] shrink-0 flex-col border-l border-border bg-card"
-      style={{ width, maxWidth: SIDEBAR_MAX_WIDTH }}
+      ref={drawerRef}
+      tabIndex={-1}
+      role="dialog"
+      aria-label="Job details"
+      aria-modal={isMobile || undefined}
+      className="fixed bottom-0 right-0 top-[var(--header-height)] z-50 flex max-h-[calc(100dvh-var(--header-height))] min-w-0 shrink-0 flex-col border-l border-border bg-card md:min-w-[280px]"
+      style={{
+        width: isMobile ? '100%' : width,
+        maxWidth: isMobile ? 'none' : SIDEBAR_MAX_WIDTH,
+      }}
     >
       <div className="flex items-center justify-between border-b border-border px-5 py-4">
         <h2 className="m-0 text-base font-semibold text-foreground">
@@ -195,14 +207,14 @@ export default function JobDetailsSidebar({
         </pre>
       </div>
 
-      <div
+      {!isMobile && <div
         role="presentation"
         onMouseDown={onMouseDown}
         className={cn(
           'absolute bottom-0 left-0 top-0 z-[1] w-1.5 cursor-col-resize hover:bg-accent-blue/25',
           isDragging && 'bg-accent-blue/25',
         )}
-      />
+      />}
     </aside>
   );
 }

apps/fastvideo_studio/src/components/jobs/JobQueue.test.tsx

@@ -1,4 +1,4 @@
-import { act, render, screen, waitFor } from '@testing-library/react';
+import { act, fireEvent, render, screen, waitFor } from '@testing-library/react';
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 
 import JobQueue from '@/components/jobs/JobQueue';
@@ -37,6 +37,46 @@ beforeEach(() => {
 });
 
 describe('JobQueue', () => {
+  it('shows a loading placeholder before the initial request settles', async () => {
+    let resolveJobs: (jobs: Job[]) => void = () => {};
+    vi.mocked(getJobsList).mockReturnValue(
+      new Promise<Job[]>((resolve) => {
+        resolveJobs = resolve;
+      }),
+    );
+
+    render(<JobQueue jobType="inference" />);
+
+    expect(screen.getByLabelText('Loading jobs')).toBeInTheDocument();
+    expect(
+      screen.queryByText('No inference jobs yet. Create one above.'),
+    ).not.toBeInTheDocument();
+
+    act(() => resolveJobs([]));
+    expect(
+      await screen.findByText('No inference jobs yet. Create one above.'),
+    ).toBeInTheDocument();
+  });
+
+  it('shows request failures separately from an empty queue and retries', async () => {
+    vi.spyOn(console, 'error').mockImplementation(() => {});
+    vi.mocked(getJobsList).mockRejectedValueOnce(new Error('network down'));
+    render(<JobQueue jobType="inference" />);
+
+    expect(
+      await screen.findByText(/Could not load jobs from the Studio API/),
+    ).toBeInTheDocument();
+    expect(
+      screen.queryByText('No inference jobs yet. Create one above.'),
+    ).not.toBeInTheDocument();
+
+    vi.mocked(getJobsList).mockResolvedValueOnce([]);
+    fireEvent.click(screen.getByRole('button', { name: 'Try Again' }));
+    expect(
+      await screen.findByText('No inference jobs yet. Create one above.'),
+    ).toBeInTheDocument();
+  });
+
   it('shows an empty placeholder and fetches for the single job type', async () => {
     render(<JobQueue jobType="inference" />);
     expect(

apps/fastvideo_studio/src/components/jobs/JobQueue.tsx

@@ -1,8 +1,10 @@
 'use client';
 
 import * as React from 'react';
+import { AlertTriangle } from 'lucide-react';
 
 import JobCard from '@/components/jobs/JobCard';
+import { Button } from '@/components/ui/button';
 import { useStore } from '@/hooks/useStore';
 import { getJobsList } from '@/lib/api';
 import type { Job, JobType } from '@/lib/types';
@@ -32,6 +34,8 @@ function jobsShallowEqual(a: Job | null, b: Job | null): boolean {
 
 export default function JobQueue({ jobType, jobTypesForList }: JobQueueProps) {
   const [jobs, setJobs] = React.useState<Job[]>([]);
+  const [isInitialLoading, setIsInitialLoading] = React.useState(true);
+  const [error, setError] = React.useState<string | null>(null);
   const { nonce } = useStore(jobsRefreshStore);
   const { activeJobId } = useStore(activeJobStore);
 
@@ -71,11 +75,22 @@ export default function JobQueue({ jobType, jobTypesForList }: JobQueueProps) {
               new Date(a.created_at ?? 0).getTime(),
           );
       }
-      if (seq === fetchSeq.current) setJobs(next);
+      if (seq === fetchSeq.current) {
+        setJobs(next);
+        setError(null);
+      }
     } catch (e) {
       console.error('Failed to fetch jobs:', e);
+      if (seq === fetchSeq.current) {
+        setError(
+          'Could not load jobs from the Studio API. Check the server and try again.',
+        );
+      }
     } finally {
-      if (seq === fetchSeq.current) inFlight.current = false;
+      if (seq === fetchSeq.current) {
+        inFlight.current = false;
+        setIsInitialLoading(false);
+      }
     }
   }, [typesKey]);
 
@@ -122,20 +137,59 @@ export default function JobQueue({ jobType, jobTypesForList }: JobQueueProps) {
   const multiType = typesToFetch.length > 1;
 
   return (
-    <main className="mx-auto flex w-full max-w-[850px] flex-col gap-6 px-4 pb-12">
+    <div className="mx-auto flex w-full max-w-[850px] flex-col gap-6 px-4 pb-12">
       <section className="p-6">
-        <div>
-          {jobs.length === 0 ? (
+        <div aria-busy={isInitialLoading}>
+          {isInitialLoading ? (
+            <div
+              aria-label="Loading jobs"
+              className="flex flex-col gap-3 py-2"
+            >
+              {[0, 1, 2].map((item) => (
+                <div
+                  key={item}
+                  className="h-32 animate-pulse rounded-lg border border-border bg-muted/50"
+                />
+              ))}
+            </div>
+          ) : error && jobs.length === 0 ? (
+            <div
+              role="alert"
+              className="flex flex-col items-center gap-3 py-8 text-center"
+            >
+              <AlertTriangle
+                className="size-6 text-destructive"
+                aria-hidden
+              />
+              <p className="max-w-md text-sm text-muted-foreground">{error}</p>
+              <Button type="button" variant="outline" onClick={fetchJobs}>
+                Try Again
+              </Button>
+            </div>
+          ) : (
+            <>
+              {error && (
+                <p
+                  role="status"
+                  className="mb-3 rounded-lg border border-amber-500/50 bg-amber-500/10 px-3 py-2 text-sm text-foreground"
+                >
+                  Job updates are temporarily unavailable. Showing the most
+                  recent results.
+                </p>
+              )}
+              {jobs.length === 0 ? (
             <p className="py-8 text-center text-muted-foreground">
               No {multiType ? 'jobs' : `${jobType} jobs`} yet. Create one above.
             </p>
-          ) : (
-            jobs.map((job) => (
-              <JobCard key={job.id} job={job} onJobUpdated={fetchJobs} />
-            ))
+              ) : (
+                jobs.map((job) => (
+                  <JobCard key={job.id} job={job} onJobUpdated={fetchJobs} />
+                ))
+              )}
+            </>
           )}
         </div>
       </section>
-    </main>
+    </div>
   );
 }

apps/fastvideo_studio/src/components/shell/AppShell.tsx

@@ -9,6 +9,7 @@ import { HeaderActionsProvider } from '@/components/shell/HeaderActionsContext';
 import PrimarySidebar from '@/components/shell/PrimarySidebar';
 import JobDetailsSidebar from '@/components/jobs/JobDetailsSidebar';
 import { Toaster } from '@/components/ui/sonner';
+import { useMediaQuery } from '@/hooks/useMediaQuery';
 import { useStore } from '@/hooks/useStore';
 import {
   activeDatasetStore,
@@ -23,46 +24,80 @@ export function AppShell({ children }: { children: React.ReactNode }) {
   const pathname = usePathname();
   const { activeJob } = useStore(activeJobStore);
   const { activeDataset } = useStore(activeDatasetStore);
+  const isMobile = useMediaQuery('(max-width: 767px)');
 
   const [primaryWidth, setPrimaryWidth] = React.useState(220);
   const [secondaryWidth, setSecondaryWidth] = React.useState(0);
+  const [primaryOpen, setPrimaryOpen] = React.useState(false);
 
   const jobSidebarOpen = JOB_ROUTES.includes(pathname) && activeJob != null;
   const datasetSidebarOpen =
     pathname === '/datasets' && activeDataset != null;
   const secondaryOpen = jobSidebarOpen || datasetSidebarOpen;
+  // Mobile detail drawers claim aria-modal, so everything behind them must
+  // actually be inert — the platform enforces what the ARIA claims.
+  const drawerModal = isMobile && secondaryOpen;
 
   React.useEffect(() => {
     initDefaultOptions();
   }, []);
 
+  React.useEffect(() => {
+    setPrimaryOpen(false);
+  }, [pathname]);
+
   React.useEffect(() => {
     function handleKeyDown(e: KeyboardEvent) {
-      if (e.key === 'Escape' && !document.querySelector('[data-modal]')) {
-        if (activeJobStore.get().activeJob) setActiveJobId(null);
-        if (activeDatasetStore.get().activeDataset) setActiveDatasetId(null);
+      if (e.key !== 'Escape' || document.querySelector('[data-modal]')) return;
+      if (primaryOpen) {
+        setPrimaryOpen(false);
+        return;
       }
+      if (activeJobStore.get().activeJob) setActiveJobId(null);
+      if (activeDatasetStore.get().activeDataset) setActiveDatasetId(null);
     }
     document.addEventListener('keydown', handleKeyDown);
     return () => document.removeEventListener('keydown', handleKeyDown);
-  }, []);
+  }, [primaryOpen]);
 
   return (
     <HeaderActionsProvider>
-      <Header />
+      <div
+        style={{ display: 'contents' }}
+        inert={drawerModal ? true : undefined}
+      >
+        <Header
+          navigationOpen={primaryOpen}
+          onNavigationToggle={() => setPrimaryOpen((open) => !open)}
+        />
+      </div>
       <div
         className="flex overflow-hidden"
         style={{
           marginTop: 'var(--header-height)',
-          height: 'calc(100vh - var(--header-height))',
+          height: 'calc(100dvh - var(--header-height))',
         }}
       >
-        <PrimarySidebar onWidthChange={setPrimaryWidth} />
+        <PrimarySidebar
+          isMobile={isMobile}
+          mobileOpen={primaryOpen}
+          onMobileClose={() => setPrimaryOpen(false)}
+          onWidthChange={setPrimaryWidth}
+        />
+        {primaryOpen && (
+          <button
+            type="button"
+            aria-label="Close navigation"
+            onClick={() => setPrimaryOpen(false)}
+            className="fixed inset-x-0 bottom-0 top-[var(--header-height)] z-40 bg-black/55 md:hidden"
+          />
+        )}
         <main
           className="flex min-w-0 flex-1 flex-col overflow-auto"
+          inert={drawerModal ? true : undefined}
           style={{
-            marginLeft: primaryWidth,
-            marginRight: secondaryOpen ? secondaryWidth : 0,
+            marginLeft: isMobile ? 0 : primaryWidth,
+            marginRight: isMobile || !secondaryOpen ? 0 : secondaryWidth,
           }}
         >
           {children}
@@ -70,6 +105,7 @@ export function AppShell({ children }: { children: React.ReactNode }) {
         {jobSidebarOpen && activeJob && (
           <JobDetailsSidebar
             job={activeJob}
+            isMobile={isMobile}
             onClose={() => setActiveJobId(null)}
             onWidthChange={setSecondaryWidth}
           />
@@ -77,6 +113,7 @@ export function AppShell({ children }: { children: React.ReactNode }) {
         {datasetSidebarOpen && activeDataset && (
           <DatasetSidebar
             dataset={activeDataset}
+            isMobile={isMobile}
             onClose={() => setActiveDatasetId(null)}
             onWidthChange={setSecondaryWidth}
           />

apps/fastvideo_studio/src/components/shell/Header.tsx

@@ -1,8 +1,10 @@
 'use client';
 
+import { Menu, X } from 'lucide-react';
 import { usePathname } from 'next/navigation';
 
 import { useHeaderActions } from '@/components/shell/HeaderActionsContext';
+import { Button } from '@/components/ui/button';
 import { ThemeToggle } from '@/components/ui/theme-toggle';
 
 const TAB_TITLES: Record<string, string> = {
@@ -15,25 +17,47 @@ const TAB_TITLES: Record<string, string> = {
   '/settings': 'Settings',
 };
 
-export default function Header() {
+export default function Header({
+  navigationOpen,
+  onNavigationToggle,
+}: {
+  navigationOpen: boolean;
+  onNavigationToggle: () => void;
+}) {
   const pathname = usePathname();
   const { actions } = useHeaderActions();
   const title = TAB_TITLES[pathname] ?? 'FastVideo';
 
   return (
-    <header className="fixed inset-x-0 top-0 z-[100] flex h-[var(--header-height)] items-center gap-6 border-b border-border bg-background/80 px-6 backdrop-blur">
+    <header className="fixed inset-x-0 top-0 z-[100] flex h-[var(--header-height)] items-center gap-2 border-b border-border bg-background/80 px-2 backdrop-blur sm:px-4 md:gap-6 md:px-6">
+      <Button
+        type="button"
+        variant="outline"
+        size="icon"
+        aria-label={navigationOpen ? 'Close navigation' : 'Open navigation'}
+        aria-controls="primary-navigation"
+        aria-expanded={navigationOpen}
+        onClick={onNavigationToggle}
+        className="shrink-0 md:hidden"
+      >
+        {navigationOpen ? (
+          <X className="size-5" aria-hidden />
+        ) : (
+          <Menu className="size-5" aria-hidden />
+        )}
+      </Button>
       {/* eslint-disable-next-line @next/next/no-img-element */}
       <img
         src="/logo.svg"
         alt="FastVideo Logo"
         width={100}
         height={42}
-        className="block h-[42px] w-[100px]"
+        className="hidden h-[42px] w-[78px] shrink-0 object-contain min-[361px]:block md:w-[100px]"
       />
-      <h1 className="m-0 flex-1 text-xl font-semibold tracking-tight">
+      <h1 className="sr-only m-0 flex-1 text-xl font-semibold tracking-tight md:not-sr-only">
         {title}
       </h1>
-      <div className="flex items-center gap-3">
+      <div className="ml-auto flex min-w-0 items-center gap-2 md:gap-3">
         {actions}
         <ThemeToggle />
       </div>

apps/fastvideo_studio/src/components/shell/PrimarySidebar.tsx

@@ -1,6 +1,7 @@
 'use client';
 
 import * as React from 'react';
+import { X } from 'lucide-react';
 import Link from 'next/link';
 import { usePathname } from 'next/navigation';
 
@@ -19,12 +20,18 @@ const JOB_ROUTES = [
 ] as const;
 
 const TAB_BASE =
-  'block px-5 py-[0.65rem] text-left text-sm text-muted-foreground transition-colors hover:bg-accent/60 hover:text-foreground';
+  'block min-h-11 px-5 py-[0.65rem] text-left text-sm text-muted-foreground transition-colors hover:bg-accent/60 hover:text-foreground';
 const TAB_ACTIVE = 'bg-accent-blue/10 font-medium text-accent-blue';
 
 export default function PrimarySidebar({
+  isMobile,
+  mobileOpen,
+  onMobileClose,
   onWidthChange,
 }: {
+  isMobile: boolean;
+  mobileOpen: boolean;
+  onMobileClose: () => void;
   onWidthChange?: (w: number) => void;
 }) {
   const pathname = usePathname();
@@ -38,8 +45,8 @@ export default function PrimarySidebar({
   const isJobsActive = JOB_ROUTES.some((r) => pathname === r.href);
 
   React.useEffect(() => {
-    onWidthChange?.(layoutWidth);
-  }, [layoutWidth, onWidthChange]);
+    onWidthChange?.(isMobile ? 0 : layoutWidth);
+  }, [isMobile, layoutWidth, onWidthChange]);
 
   React.useEffect(() => {
     if (JOB_ROUTES.some((r) => pathname === r.href)) {
@@ -58,11 +65,37 @@ export default function PrimarySidebar({
 
   return (
     <aside
-      className="fixed bottom-0 left-0 top-[var(--header-height)] z-50 flex max-h-[calc(100vh-var(--header-height))] shrink-0 flex-col border-r border-border bg-card"
-      style={{ width: effectiveWidth }}
+      id="primary-navigation"
+      aria-hidden={isMobile && !mobileOpen}
+      inert={isMobile && !mobileOpen ? true : undefined}
+      className={cn(
+        'fixed bottom-0 left-0 top-[var(--header-height)] z-50 flex max-h-[calc(100dvh-var(--header-height))] shrink-0 flex-col border-r border-border bg-card transition-transform duration-200 md:translate-x-0',
+        mobileOpen ? 'translate-x-0' : '-translate-x-full',
+      )}
+      style={{
+        width: isMobile
+          ? 'min(18rem, calc(100vw - 3rem))'
+          : effectiveWidth,
+      }}
     >
+      {isMobile && (
+        <div className="flex h-14 items-center justify-between border-b border-border px-4">
+          <span className="text-sm font-semibold">Navigation</span>
+          <button
+            type="button"
+            onClick={onMobileClose}
+            aria-label="Close navigation"
+            className="flex size-11 items-center justify-center rounded-lg text-muted-foreground hover:bg-accent hover:text-foreground"
+          >
+            <X className="size-5" aria-hidden />
+          </button>
+        </div>
+      )}
       {!isCollapsed && (
-        <nav className="flex flex-col py-2">
+        <nav
+          aria-label="Primary navigation"
+          className="flex flex-col overflow-y-auto py-2"
+        >
           <div className="flex flex-col">
             <button
               type="button"
@@ -95,6 +128,8 @@ export default function PrimarySidebar({
                   <Link
                     key={route.href}
                     href={route.href}
+                    aria-current={pathname === route.href ? 'page' : undefined}
+                    onClick={onMobileClose}
                     className={cn(
                       TAB_BASE,
                       'px-4 py-2 text-[0.85rem]',
@@ -109,24 +144,32 @@ export default function PrimarySidebar({
           </div>
           <Link
             href="/datasets"
+            aria-current={pathname === '/datasets' ? 'page' : undefined}
+            onClick={onMobileClose}
             className={cn(TAB_BASE, pathname === '/datasets' && TAB_ACTIVE)}
           >
             Datasets
           </Link>
           <Link
             href="/gallery"
+            aria-current={pathname === '/gallery' ? 'page' : undefined}
+            onClick={onMobileClose}
             className={cn(TAB_BASE, pathname === '/gallery' && TAB_ACTIVE)}
           >
             Gallery
           </Link>
           <Link
             href="/gpus"
+            aria-current={pathname === '/gpus' ? 'page' : undefined}
+            onClick={onMobileClose}
             className={cn(TAB_BASE, pathname === '/gpus' && TAB_ACTIVE)}
           >
             GPUs
           </Link>
           <Link
             href="/settings"
+            aria-current={pathname === '/settings' ? 'page' : undefined}
+            onClick={onMobileClose}
             className={cn(TAB_BASE, pathname === '/settings' && TAB_ACTIVE)}
           >
             Settings
@@ -134,7 +177,7 @@ export default function PrimarySidebar({
         </nav>
       )}
 
-      <div
+      {!isMobile && <div
         className={cn(
           'absolute bottom-0 p-2',
           isCollapsed ? '-right-[60px] top-0' : 'right-0',
@@ -145,8 +188,7 @@ export default function PrimarySidebar({
           onClick={() => setIsCollapsed((v) => !v)}
           title={isCollapsed ? 'Expand sidebar' : 'Collapse sidebar'}
           className={cn(
-            'flex items-center justify-center rounded-lg text-muted-foreground transition-colors hover:bg-accent hover:text-foreground',
-            isCollapsed ? 'p-3' : 'p-2',
+            'flex size-11 items-center justify-center rounded-lg text-muted-foreground transition-colors hover:bg-accent hover:text-foreground',
           )}
         >
           <svg
@@ -159,9 +201,9 @@ export default function PrimarySidebar({
             <path d={isCollapsed ? 'M9 18l6-6-6-6' : 'M15 18l-6-6 6-6'} />
           </svg>
         </button>
-      </div>
+      </div>}
 
-      {!isCollapsed && (
+      {!isMobile && !isCollapsed && (
         <div
           role="presentation"
           onMouseDown={onMouseDown}

apps/fastvideo_studio/src/components/system/GpuGrid.test.tsx

@@ -1,4 +1,4 @@
-import { render, screen } from '@testing-library/react';
+import { act, render, screen } from '@testing-library/react';
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 
 import GpuGrid from './GpuGrid';
@@ -73,4 +73,30 @@ describe('GpuGrid', () => {
       await screen.findByText(/Could not reach the API server/),
     ).toBeInTheDocument();
   });
+
+  it('keeps the last snapshot visible and warns when a refresh fails', async () => {
+    vi.useFakeTimers();
+    try {
+      vi.mocked(getGpus)
+        .mockResolvedValueOnce(SNAPSHOT)
+        .mockRejectedValueOnce(new Error('network down'));
+
+      render(<GpuGrid />);
+      await act(async () => {
+        await vi.advanceTimersByTimeAsync(0);
+      });
+      expect(screen.getAllByText('NVIDIA B200')).toHaveLength(2);
+
+      await act(async () => {
+        await vi.advanceTimersByTimeAsync(3000);
+      });
+
+      expect(
+        screen.getByText(/values below may be stale/),
+      ).toBeInTheDocument();
+      expect(screen.getAllByText('NVIDIA B200')).toHaveLength(2);
+    } finally {
+      vi.useRealTimers();
+    }
+  });
 });

apps/fastvideo_studio/src/components/system/GpuGrid.tsx

@@ -1,7 +1,9 @@
 'use client';
 
 import * as React from 'react';
+import { AlertTriangle } from 'lucide-react';
 
+import { Button } from '@/components/ui/button';
 import { Card, CardContent } from '@/components/ui/card';
 import { getGpus, type GpuInfo, type GpuSnapshot } from '@/lib/api';
 import { cn } from '@/lib/utils';
@@ -97,7 +99,8 @@ function GpuCard({ gpu }: { gpu: GpuInfo }) {
 
 export default function GpuGrid() {
   const [snapshot, setSnapshot] = React.useState<GpuSnapshot | null>(null);
-  const [fetchError, setFetchError] = React.useState(false);
+  const [fetchError, setFetchError] = React.useState<string | null>(null);
+  const [retryToken, setRetryToken] = React.useState(0);
 
   React.useEffect(() => {
     let mounted = true;
@@ -110,10 +113,14 @@ export default function GpuGrid() {
         const next = await getGpus();
         if (mounted) {
           setSnapshot(next);
-          setFetchError(false);
+          setFetchError(null);
         }
       } catch {
-        if (mounted) setFetchError(true);
+        if (mounted) {
+          setFetchError(
+            'GPU status could not be refreshed. The values below may be stale.',
+          );
+        }
       } finally {
         inFlight = false;
       }
@@ -125,14 +132,27 @@ export default function GpuGrid() {
       mounted = false;
       clearInterval(interval);
     };
-  }, []);
+  }, [retryToken]);
 
   if (fetchError && !snapshot) {
     return (
-      <p className="py-8 text-center text-muted-foreground">
-        Could not reach the API server. GPU status needs the studio API server
-        running.
-      </p>
+      <div
+        role="alert"
+        className="flex flex-col items-center gap-3 py-8 text-center"
+      >
+        <AlertTriangle className="size-6 text-destructive" aria-hidden />
+        <p className="text-muted-foreground">
+          Could not reach the API server. GPU status needs the Studio API server
+          running.
+        </p>
+        <Button
+          type="button"
+          variant="outline"
+          onClick={() => setRetryToken((token) => token + 1)}
+        >
+          Try Again
+        </Button>
+      </div>
     );
   }
   if (!snapshot) {
@@ -150,9 +170,22 @@ export default function GpuGrid() {
   return (
     <div className="flex flex-col gap-4">
       {fetchError && (
-        <p className="rounded-md border border-amber-500/40 bg-amber-500/10 px-3 py-2 text-sm text-amber-600 dark:text-amber-400">
-          Lost contact with the API server — showing the last known values.
-        </p>
+        <div
+          role="status"
+          aria-live="polite"
+          className="flex flex-wrap items-center gap-3 rounded-lg border border-amber-500/50 bg-amber-500/10 px-3 py-2 text-sm"
+        >
+          <AlertTriangle className="size-4 text-amber-600" aria-hidden />
+          <span className="min-w-0 flex-1">{fetchError}</span>
+          <Button
+            type="button"
+            variant="outline"
+            size="sm"
+            onClick={() => setRetryToken((token) => token + 1)}
+          >
+            Refresh Now
+          </Button>
+        </div>
       )}
       <div className="grid gap-4 [grid-template-columns:repeat(auto-fill,minmax(280px,1fr))]">
         {snapshot.gpus.map((gpu) => (

apps/fastvideo_studio/src/components/ui/accessibility.test.tsx

@@ -0,0 +1,48 @@
+import { render, screen } from '@testing-library/react';
+import { describe, expect, it } from 'vitest';
+
+import { Button } from './button';
+import { Input } from './input';
+import { NativeSelect } from './native-select';
+import { Slider } from './slider';
+import { Switch } from './switch';
+
+describe('shared control accessibility', () => {
+  it('keeps button, input, and select targets at least 44px tall', () => {
+    render(
+      <>
+        <Button size="sm">Small action</Button>
+        <Input aria-label="Text value" />
+        <NativeSelect aria-label="Choice" defaultValue="one">
+          <option value="one">One</option>
+        </NativeSelect>
+      </>,
+    );
+
+    expect(screen.getByRole('button', { name: 'Small action' })).toHaveClass(
+      'h-11',
+    );
+    expect(screen.getByRole('textbox', { name: 'Text value' })).toHaveClass(
+      'h-11',
+    );
+    expect(screen.getByRole('combobox', { name: 'Choice' })).toHaveClass(
+      'h-11',
+    );
+  });
+
+  it('uses 44px switch and slider interaction surfaces', () => {
+    render(
+      <>
+        <Switch aria-label="Enabled" />
+        <Slider aria-label="Amount" defaultValue={[50]} />
+      </>,
+    );
+
+    expect(screen.getByRole('switch', { name: 'Enabled' })).toHaveClass(
+      'size-11',
+    );
+    expect(screen.getByRole('slider', { name: 'Amount' })).toHaveClass(
+      'size-11',
+    );
+  });
+});

apps/fastvideo_studio/src/components/ui/badge.tsx

@@ -29,11 +29,12 @@ const badgeVariants = cva(
 );
 
 export interface BadgeProps
-  extends React.HTMLAttributes<HTMLDivElement>,
+  extends React.HTMLAttributes<HTMLSpanElement>,
     VariantProps<typeof badgeVariants> {}
 
+// A span (phrasing content), so badges stay valid inside buttons and links.
 function Badge({ className, variant, ...props }: BadgeProps) {
-  return <div className={cn(badgeVariants({ variant }), className)} {...props} />;
+  return <span className={cn(badgeVariants({ variant }), className)} {...props} />;
 }
 
 export { Badge, badgeVariants };

apps/fastvideo_studio/src/components/ui/button.tsx

@@ -7,7 +7,7 @@ import { cva, type VariantProps } from "class-variance-authority";
 import { cn } from "@/lib/utils";
 
 const buttonVariants = cva(
-	"inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-xl border !text-sm !font-semibold transition-colors duration-150 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-sky-400/40 disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50",
+	"inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-xl border !text-sm !font-semibold transition-colors duration-150 disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50",
 	{
 		variants: {
 			variant: {
@@ -18,11 +18,11 @@ const buttonVariants = cva(
 				destructive: "border-rose-500/60 bg-rose-600/90 text-white hover:bg-rose-500",
 			},
 			size: {
-				default: "h-10 px-4 py-2",
-				sm: "h-9 rounded-lg px-3 !text-xs",
-				lg: "h-11 px-5 !text-sm",
-				icon: "size-10",
-				"icon-sm": "size-8",
+				default: "h-11 px-4 py-2",
+				sm: "h-11 rounded-lg px-3 !text-xs",
+				lg: "h-12 px-5 !text-sm",
+				icon: "size-11",
+				"icon-sm": "size-11",
 			},
 		},
 		defaultVariants: {

apps/fastvideo_studio/src/components/ui/dialog.tsx

@@ -42,7 +42,7 @@ const DialogContent = React.forwardRef<
       {...props}
     >
       {children}
-      <DialogPrimitive.Close className="absolute right-4 top-4 rounded-lg p-1 text-muted-foreground opacity-70 transition-opacity hover:bg-secondary hover:opacity-100 focus:outline-none focus:ring-2 focus:ring-sky-400/40 disabled:pointer-events-none">
+      <DialogPrimitive.Close className="absolute right-2 top-2 flex size-11 items-center justify-center rounded-lg text-muted-foreground opacity-70 transition-opacity hover:bg-secondary hover:opacity-100 disabled:pointer-events-none sm:right-4 sm:top-4">
         <X className="h-4 w-4" />
         <span className="sr-only">Close</span>
       </DialogPrimitive.Close>

apps/fastvideo_studio/src/components/ui/input.tsx

@@ -9,7 +9,7 @@ const Input = React.forwardRef<HTMLInputElement, React.ComponentProps<"input">>(
 		<input
 			type={type}
 			className={cn(
-				"flex h-10 w-full rounded-xl border border-input bg-card/60 px-3 py-2 text-sm text-foreground shadow-sm backdrop-blur-md transition-colors placeholder:text-muted-foreground focus-visible:border-sky-400/70 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-sky-400/25 disabled:cursor-not-allowed disabled:opacity-50",
+				"flex h-11 w-full rounded-xl border border-input bg-card/60 px-3 py-2 text-sm text-foreground shadow-sm backdrop-blur-md transition-colors placeholder:text-muted-foreground focus-visible:border-ring disabled:cursor-not-allowed disabled:opacity-50",
 				className,
 			)}
 			ref={ref}

apps/fastvideo_studio/src/components/ui/native-select.tsx

@@ -11,7 +11,7 @@ const NativeSelect = React.forwardRef<
   <select
     ref={ref}
     className={cn(
-      'flex h-10 w-full appearance-none rounded-xl border border-input bg-card px-3 py-2 text-sm text-foreground shadow-sm transition-colors focus-visible:border-sky-400/70 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-sky-400/25 disabled:cursor-not-allowed disabled:opacity-50',
+      'flex h-11 w-full appearance-none rounded-xl border border-input bg-card px-3 py-2 text-sm text-foreground shadow-sm transition-colors focus-visible:border-ring disabled:cursor-not-allowed disabled:opacity-50',
       className,
     )}
     {...props}

apps/fastvideo_studio/src/components/ui/select.tsx

@@ -17,7 +17,7 @@ const SelectTrigger = React.forwardRef<
   <SelectPrimitive.Trigger
     ref={ref}
     className={cn(
-      'flex h-10 w-full items-center justify-between gap-2 rounded-xl border border-input bg-card px-3 py-2 text-sm text-foreground shadow-sm outline-none transition-colors placeholder:text-muted-foreground focus:border-sky-400/70 focus:ring-2 focus:ring-sky-400/25 disabled:cursor-not-allowed disabled:opacity-50 [&>span]:line-clamp-1',
+      'flex h-11 w-full items-center justify-between gap-2 rounded-xl border border-input bg-card px-3 py-2 text-sm text-foreground shadow-sm transition-colors placeholder:text-muted-foreground focus-visible:border-ring disabled:cursor-not-allowed disabled:opacity-50 [&>span]:line-clamp-1',
       className,
     )}
     {...props}
@@ -117,7 +117,7 @@ const SelectItem = React.forwardRef<
   <SelectPrimitive.Item
     ref={ref}
     className={cn(
-      'relative flex w-full cursor-default select-none items-center rounded-xl py-2 pl-8 pr-3 text-sm text-foreground outline-none data-[disabled]:pointer-events-none data-[disabled]:opacity-50 data-[highlighted]:bg-accent data-[highlighted]:text-accent-foreground',
+      'relative flex min-h-11 w-full cursor-default select-none items-center rounded-xl py-2 pl-8 pr-3 text-sm text-foreground outline-none data-[disabled]:pointer-events-none data-[disabled]:opacity-50 data-[highlighted]:bg-accent data-[highlighted]:text-accent-foreground',
       className,
     )}
     {...props}

apps/fastvideo_studio/src/components/ui/slider.tsx

@@ -8,21 +8,39 @@ import { cn } from '@/lib/utils';
 const Slider = React.forwardRef<
   React.ElementRef<typeof SliderPrimitive.Root>,
   React.ComponentPropsWithoutRef<typeof SliderPrimitive.Root>
->(({ className, ...props }, ref) => (
-  <SliderPrimitive.Root
-    ref={ref}
-    className={cn(
-      'relative flex w-full touch-none select-none items-center',
+>(
+  (
+    {
       className,
-    )}
-    {...props}
-  >
-    <SliderPrimitive.Track className="relative h-1.5 w-full grow overflow-hidden rounded-full bg-border">
-      <SliderPrimitive.Range className="absolute h-full bg-accent-blue" />
-    </SliderPrimitive.Track>
-    <SliderPrimitive.Thumb className="block h-4 w-4 rounded-full border-2 border-accent-blue bg-accent-blue shadow transition-colors hover:border-accent-blue/80 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-sky-400/40 disabled:pointer-events-none disabled:opacity-50" />
-  </SliderPrimitive.Root>
-));
+      id,
+      'aria-label': ariaLabel,
+      'aria-labelledby': ariaLabelledBy,
+      'aria-describedby': ariaDescribedBy,
+      ...props
+    },
+    ref,
+  ) => (
+    <SliderPrimitive.Root
+      ref={ref}
+      className={cn(
+        'relative flex h-11 w-full touch-none select-none items-center',
+        className,
+      )}
+      {...props}
+    >
+      <SliderPrimitive.Track className="relative h-1.5 w-full grow overflow-hidden rounded-full bg-border">
+        <SliderPrimitive.Range className="absolute h-full bg-accent-blue" />
+      </SliderPrimitive.Track>
+      <SliderPrimitive.Thumb
+        id={id}
+        aria-label={ariaLabel}
+        aria-labelledby={ariaLabelledBy}
+        aria-describedby={ariaDescribedBy}
+        className="relative block size-11 rounded-full bg-transparent after:absolute after:left-1/2 after:top-1/2 after:size-4 after:-translate-x-1/2 after:-translate-y-1/2 after:rounded-full after:border-2 after:border-accent-blue after:bg-accent-blue after:shadow after:content-[''] hover:after:border-accent-blue/80 disabled:pointer-events-none disabled:opacity-50"
+      />
+    </SliderPrimitive.Root>
+  ),
+);
 Slider.displayName = SliderPrimitive.Root.displayName;
 
 export { Slider };

apps/fastvideo_studio/src/components/ui/switch.tsx

@@ -12,14 +12,14 @@ const Switch = React.forwardRef<
   <SwitchPrimitives.Root
     ref={ref}
     className={cn(
-      'peer inline-flex h-5 w-9 shrink-0 cursor-pointer items-center rounded-full border border-border transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-sky-400/40 disabled:cursor-not-allowed disabled:opacity-50 data-[state=checked]:border-accent-blue data-[state=checked]:bg-accent-blue data-[state=unchecked]:bg-background',
+      'peer relative inline-flex size-11 shrink-0 cursor-pointer items-center justify-center rounded-xl bg-transparent transition-colors before:absolute before:h-5 before:w-9 before:rounded-full before:border before:border-border before:bg-background data-[state=checked]:before:border-accent-blue data-[state=checked]:before:bg-accent-blue disabled:cursor-not-allowed disabled:opacity-50',
       className,
     )}
     {...props}
   >
     <SwitchPrimitives.Thumb
       className={cn(
-        'pointer-events-none block h-3.5 w-3.5 rounded-full bg-muted-foreground shadow-lg ring-0 transition-transform data-[state=checked]:translate-x-4 data-[state=checked]:bg-white data-[state=unchecked]:translate-x-0.5',
+        'pointer-events-none absolute left-1.5 top-[15px] z-[1] block h-3.5 w-3.5 rounded-full bg-muted-foreground shadow-lg ring-0 transition-transform data-[state=checked]:translate-x-4 data-[state=checked]:bg-white',
       )}
     />
   </SwitchPrimitives.Root>

apps/fastvideo_studio/src/components/ui/tabs.tsx

@@ -29,7 +29,7 @@ const TabsTrigger = React.forwardRef<
   <TabsPrimitive.Trigger
     ref={ref}
     className={cn(
-      'inline-flex items-center justify-center whitespace-nowrap rounded-md px-3 py-1.5 text-sm font-medium text-muted-foreground transition-colors hover:text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-sky-400/40 disabled:pointer-events-none disabled:opacity-50 data-[state=active]:bg-card data-[state=active]:text-foreground data-[state=active]:shadow-sm',
+      'inline-flex items-center justify-center whitespace-nowrap rounded-md px-3 py-1.5 text-sm font-medium text-muted-foreground transition-colors hover:text-foreground disabled:pointer-events-none disabled:opacity-50 data-[state=active]:bg-card data-[state=active]:text-foreground data-[state=active]:shadow-sm',
       className,
     )}
     {...props}

apps/fastvideo_studio/src/components/ui/textarea.tsx

@@ -8,7 +8,7 @@ const Textarea = React.forwardRef<HTMLTextAreaElement, React.ComponentProps<"tex
 	return (
 		<textarea
 			className={cn(
-				"flex min-h-24 w-full resize-y rounded-xl border border-input bg-card px-3 py-2 text-sm text-foreground shadow-sm transition-colors placeholder:text-muted-foreground focus-visible:border-sky-400/70 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-sky-400/25 disabled:cursor-not-allowed disabled:opacity-50",
+				"flex min-h-24 w-full resize-y rounded-xl border border-input bg-card px-3 py-2 text-sm text-foreground shadow-sm transition-colors placeholder:text-muted-foreground focus-visible:border-ring disabled:cursor-not-allowed disabled:opacity-50",
 				className,
 			)}
 			ref={ref}

apps/fastvideo_studio/src/hooks/useDrawerFocus.ts

@@ -0,0 +1,23 @@
+'use client';
+
+import * as React from 'react';
+
+/**
+ * Move focus into a drawer when it opens as a modal (mobile), and hand it
+ * back to the previously focused element on close. Pairs with `inert` on
+ * the background content — together they make `aria-modal` truthful.
+ */
+export function useDrawerFocus<T extends HTMLElement>(active: boolean) {
+  const ref = React.useRef<T | null>(null);
+
+  React.useEffect(() => {
+    if (!active) return;
+    const previous = document.activeElement;
+    ref.current?.focus();
+    return () => {
+      if (previous instanceof HTMLElement) previous.focus();
+    };
+  }, [active]);
+
+  return ref;
+}

apps/fastvideo_studio/src/hooks/useMediaQuery.ts

@@ -0,0 +1,18 @@
+'use client';
+
+import * as React from 'react';
+
+export function useMediaQuery(query: string): boolean {
+  const [matches, setMatches] = React.useState(false);
+
+  React.useEffect(() => {
+    const mediaQuery = window.matchMedia(query);
+    const updateMatch = () => setMatches(mediaQuery.matches);
+
+    updateMatch();
+    mediaQuery.addEventListener('change', updateMatch);
+    return () => mediaQuery.removeEventListener('change', updateMatch);
+  }, [query]);
+
+  return matches;
+}

apps/fastvideo_studio/tests/test_gpu.py

@@ -74,10 +74,8 @@ def test_snapshot_shapes_devices(monkeypatch: pytest.MonkeyPatch) -> None:
     }
 
 
-def test_snapshot_tolerates_missing_sensors(
-        monkeypatch: pytest.MonkeyPatch) -> None:
-    monkeypatch.setitem(sys.modules, "pynvml",
-                        _make_fake_pynvml(broken_sensors=True))
+def test_snapshot_tolerates_missing_sensors(monkeypatch: pytest.MonkeyPatch) -> None:
+    monkeypatch.setitem(sys.modules, "pynvml", _make_fake_pynvml(broken_sensors=True))
     snap = gpu_mod.get_gpu_snapshot()
     assert snap["available"] is True
     g = snap["gpus"][0]
@@ -86,8 +84,7 @@ def test_snapshot_tolerates_missing_sensors(
     assert g["power_limit_watts"] is None
 
 
-def test_snapshot_reports_nvml_failure(
-        monkeypatch: pytest.MonkeyPatch) -> None:
+def test_snapshot_reports_nvml_failure(monkeypatch: pytest.MonkeyPatch) -> None:
     fake = _make_fake_pynvml()
     fake.nvmlInit = lambda: (_ for _ in ()).throw(_NVMLError("driver gone"))
     monkeypatch.setitem(sys.modules, "pynvml", fake)

apps/fastvideo_studio/tests/test_training_config.py

@@ -130,8 +130,7 @@ def test_dmd_builds_three_role_models_and_method_knobs() -> None:
 
 
 def test_dmd_vsa_maps_to_training_vsa_sparsity() -> None:
-    config = build_training_config(
-        _job("dmd_t2v", dmd_use_vsa=True, dmd_vsa_sparsity=0.9), "out")
+    config = build_training_config(_job("dmd_t2v", dmd_use_vsa=True, dmd_vsa_sparsity=0.9), "out")
     assert config["training"]["vsa"]["sparsity"] == 0.9
 
 
@@ -161,31 +160,27 @@ def test_validation_callback_only_when_file_given() -> None:
     without = build_training_config(_job("full_t2v"), "out")
     assert "validation" not in without["callbacks"]
 
-    with_file = build_training_config(
-        _job("full_t2v", validation_dataset_file="val.json"), "out")
+    with_file = build_training_config(_job("full_t2v", validation_dataset_file="val.json"), "out")
     validation = with_file["callbacks"]["validation"]
     assert validation["dataset_file"] == "val.json"
     assert validation["pipeline_target"].endswith(".WanPipeline")
     assert validation["sampling_steps"] == [50]
 
-    dmd = build_training_config(
-        _job("dmd_t2v", validation_dataset_file="val.json"), "out")
+    dmd = build_training_config(_job("dmd_t2v", validation_dataset_file="val.json"), "out")
     validation = dmd["callbacks"]["validation"]
     assert validation["pipeline_target"].endswith(".WanDMDPipeline")
     assert validation["sampling_steps"] == [3]
     assert validation["sampling_timesteps"] == [1000, 757, 522]
 
     # KD/ODE-init has no sampling-based validation pipeline.
-    ode = build_training_config(
-        _job("ode_init", validation_dataset_file="val.json"), "out")
+    ode = build_training_config(_job("ode_init", validation_dataset_file="val.json"), "out")
     assert "validation" not in ode["callbacks"]
 
 
 def test_ltx2_models_are_rejected() -> None:
     assert is_ltx2_model("Lightricks/LTX-2-19B")
     with pytest.raises(ValueError, match="LTX-2 training is not supported"):
-        build_training_config(
-            _job("full_t2v", model_id="Lightricks/LTX-2-19B"), "out")
+        build_training_config(_job("full_t2v", model_id="Lightricks/LTX-2-19B"), "out")
 
 
 def test_unknown_workload_is_rejected() -> None:
@@ -195,8 +190,7 @@ def test_unknown_workload_is_rejected() -> None:
 
 def test_invalid_denoising_steps_are_rejected() -> None:
     with pytest.raises(ValueError, match="Invalid DMD denoising steps"):
-        build_training_config(
-            _job("dmd_t2v", dmd_denoising_steps="1000,abc"), "out")
+        build_training_config(_job("dmd_t2v", dmd_denoising_steps="1000,abc"), "out")
 
 
 def test_training_env_has_no_backend_override() -> None:
@@ -211,8 +205,7 @@ def test_workloads_match_frontend_job_config() -> None:
     (src/lib/jobConfig.ts) — drift means creatable-but-unrunnable jobs."""
     import re
 
-    job_config = (Path(__file__).resolve().parents[1] / "src" / "lib" /
-                  "jobConfig.ts").read_text(encoding="utf-8")
+    job_config = (Path(__file__).resolve().parents[1] / "src" / "lib" / "jobConfig.ts").read_text(encoding="utf-8")
     all_types = set(re.findall(r'type:\s*"([^"]+)"', job_config))
     inference_types = {"t2v", "i2v", "t2i"}
     assert inference_types <= all_types, "jobConfig.ts parse failed"

docker/Dockerfile

@@ -186,15 +186,40 @@ RUN --mount=type=cache,target=/opt/uv/cache \
 
 COPY . .
 
-# Install FastVideo Unified Kernel exactly once. build.sh initializes only its
-# CUTLASS/ThunderKittens submodules, then compiles for TORCH_CUDA_ARCH_LIST
-# (default Hopper sm_90a) without requiring a live GPU.
+# Build immutable FastVideo kernel wheels for the published image. The requested
+# architecture remains installed for normal image users; amd64 images also carry
+# an SM89 artifact so the predominant L40S Modal lanes can reuse it exactly.
+ARG FASTVIDEO_KERNEL_PREBUILT_DIR=/opt/fastvideo-kernel-prebuilt
 RUN --mount=type=cache,target=/opt/uv/cache \
     source $HOME/.local/bin/env && \
     source /opt/venv/bin/activate && \
+    default_arch="${TORCH_CUDA_ARCH_LIST}" && \
+    default_wheel_dir="${FASTVIDEO_KERNEL_PREBUILT_DIR}/${default_arch}" && \
+    export TORCH_CUDA_ARCH_LIST="${default_arch}" && \
     cd fastvideo-kernel && \
-    CMAKE_BUILD_PARALLEL_LEVEL=${CMAKE_BUILD_PARALLEL_LEVEL} \
-    TORCH_CUDA_ARCH_LIST=${TORCH_CUDA_ARCH_LIST} ./build.sh
+    CMAKE_ARGS= CMAKE_BUILD_PARALLEL_LEVEL=${CMAKE_BUILD_PARALLEL_LEVEL} \
+    ./build.sh --wheel-dir "${default_wheel_dir}" && \
+    cd /FastVideo && \
+    CMAKE_ARGS= python fastvideo/tests/modal/kernel_build_cache.py write-build-info \
+        --wheel-dir "${default_wheel_dir}" \
+        --output "${default_wheel_dir}/metadata.json" && \
+    if [[ "${TARGETARCH:-amd64}" == "amd64" && "${default_arch}" != "8.9" ]]; then \
+        export TORCH_CUDA_ARCH_LIST=8.9 && \
+        l40s_wheel_dir="${FASTVIDEO_KERNEL_PREBUILT_DIR}/8.9" && \
+        cd /FastVideo/fastvideo-kernel && \
+        CMAKE_ARGS= CMAKE_BUILD_PARALLEL_LEVEL=${CMAKE_BUILD_PARALLEL_LEVEL} \
+        ./build.sh --wheel-dir "${l40s_wheel_dir}" && \
+        cd /FastVideo && \
+        CMAKE_ARGS= python fastvideo/tests/modal/kernel_build_cache.py write-build-info \
+            --wheel-dir "${l40s_wheel_dir}" \
+            --output "${l40s_wheel_dir}/metadata.json"; \
+    fi && \
+    export TORCH_CUDA_ARCH_LIST="${default_arch}" && \
+    default_wheel="$(find "${default_wheel_dir}" -maxdepth 1 -type f \
+        \( -name 'fastvideo_kernel-*.whl' -o -name 'fastvideo-kernel-*.whl' \) \
+        | sort | tail -n 1)" && \
+    uv pip install "${default_wheel}" \
+        --reinstall-package fastvideo-kernel --no-deps
 
 # Install FastVideo itself (editable) now that the source is present, and set up
 # shell configuration. Dependencies and the local kernel are already installed,

docs/attention/index.md

@@ -8,13 +8,15 @@ FastVideo provides highly optimized custom attention kernels to accelerate video
 * **[Sliding Tile Attention (STA)](sta/index.md)**: STA kernel support is kept in
   `fastvideo-kernel`; full FastVideo STA pipeline workflow is archived in
   `sta_do_not_delete`.
+* **[Attn-QAT Training](../training/attn_qat.md)**: Runtime-JIT Triton forward
+  and backward kernels for role-local quantization-aware training.
 * **Backend development guide**: See the developer guide at
   [Attention Backend Development](../contributing/attention_backend.md).
 
 ## General Build Instructions
 
 These instructions apply to building the `fastvideo-kernel` package from
-source, which includes both STA and VSA kernels.
+source, which includes STA, VSA, and Attn-QAT kernels.
 
 ### Prerequisites
 

docs/contributing/ci_architecture.md

@@ -255,10 +255,9 @@ If you add a new CI test category:
 
 ### Documentation
 
-`.github/workflows/infra-docs.yml` builds documentation for same-repository PRs
-that touch `docs/**`, `mkdocs.yml`, `requirements-mkdocs.txt`, or the workflow
-itself. Fork PRs skip this executable build instead of waiting for maintainer
-approval. On pushes to `main`, it also deploys the built site to GitHub Pages.
+`.github/workflows/infra-docs.yml` builds documentation for PRs that touch
+`docs/**`, `mkdocs.yml`, `requirements-mkdocs.txt`, or the workflow itself. On
+pushes to `main`, it also deploys the built site to GitHub Pages.
 
 The docs job:
 
@@ -270,16 +269,26 @@ The docs job:
 ### Docker Images
 
 `.github/workflows/infra-build-image.yml` supports manual `workflow_dispatch`
-runs and automatically rebuilds the CUDA matrix when `docker/Dockerfile`
-changes on `main` in the canonical repository. Manual runs let maintainers
-choose which image families to build. The `fastvideo-dev` matrix builds Python
-3.12 images for CUDA 12.6 and CUDA 13 on native `amd64` and `arm64` runners,
-then publishes one multi-platform manifest per CUDA version. CUDA 12.6 owns the
-`py3.12-latest` and global `latest` tags, as well as the explicit
-`py3.12-cuda12.6.3-latest` alias. CUDA 13 is published under the explicit
-`py3.12-cuda13.0.0-latest` tag. This publication policy does not change the
-unparameterized `docker/Dockerfile` build defaults, which remain CUDA 13 and
-`cu130`.
+runs and automatically rebuilds the CUDA matrix when a repository-controlled
+image input changes on `main` in the canonical repository. Those inputs include
+the CUDA Dockerfile and reusable workflow, dependency metadata, Docker context
+policy, `fastvideo-kernel/**`, and the kernel artifact metadata/key helper.
+Manual runs let maintainers choose which image families to build. The
+`fastvideo-dev` matrix builds Python 3.12 images for CUDA 12.6 and CUDA 13 on
+native `amd64` and `arm64` runners, then publishes one multi-platform manifest
+per CUDA version. CUDA 12.6 owns the `py3.12-latest` and global `latest` tags, as
+well as the explicit `py3.12-cuda12.6.3-latest` alias. CUDA 13 is published under
+the explicit `py3.12-cuda13.0.0-latest` tag. This publication policy does not
+change the unparameterized `docker/Dockerfile` build defaults, which remain CUDA
+13 and `cu130`.
+
+Published amd64 development images keep their configured Hopper kernel wheel
+installed and also carry an immutable SM89 wheel under
+`/opt/fastvideo-kernel-prebuilt`. Modal PR and SSIM jobs select the exact
+source, ABI, and GPU-architecture match from that directory, so L40S jobs reuse
+the trusted image artifact while kernel-changing PRs still build locally. Once
+a kernel or artifact-key change reaches `main`, the image workflow republishes
+the matching trusted artifact before later jobs consume the updated image tag.
 
 The optional Dreamverse matrix builds backend and UI images for CUDA 12.6 and
 CUDA 13 on `amd64`. Dreamverse remains `amd64`-only because its FA4 dependency

docs/design/inference_schema_parity_inventory.yaml

@@ -76,6 +76,7 @@ surfaces:
       lora_target_modules: "Legacy LoRA configuration surface pending dedicated component API."
       output_type: "Legacy output formatting surface pending GenerationResult cleanup."
       VSA_sparsity: "Model-specific inference optimization not yet represented in the typed public schema."
+      attention_backend: "Process-wide default attention-backend request applied per component at load time; kernel-selection knob not yet represented in the typed public schema."
       moba_config_path: "Model-specific MoBA optimization surface not yet represented in the typed public schema."
       master_port: "Executor/bootstrap compatibility field; not part of the canonical inference schema."
       refine_transformer_path: "Generic stage-2 refine transformer override; no typed equivalent yet."
@@ -333,15 +334,25 @@ surfaces:
       use_distill:
         sources: [fastvideo.configs.pipelines.longcat.LongCatT2V480PConfig, fastvideo.configs.pipelines.longcat.LongCatT2V704PConfig]
       scheduler_arch:
-        sources: [fastvideo.configs.pipelines.sd35.SD35Config]
+        sources:
+          - fastvideo.configs.pipelines.sd35.SD35Config
+          - fastvideo.configs.pipelines.zimage.ZImagePipelineConfig
       text_encoder_archs:
-        sources: [fastvideo.configs.pipelines.sd35.SD35Config]
+        sources:
+          - fastvideo.configs.pipelines.sd35.SD35Config
+          - fastvideo.configs.pipelines.zimage.ZImagePipelineConfig
       tokenizer_archs:
-        sources: [fastvideo.configs.pipelines.sd35.SD35Config]
+        sources:
+          - fastvideo.configs.pipelines.sd35.SD35Config
+          - fastvideo.configs.pipelines.zimage.ZImagePipelineConfig
       transformer_arch:
-        sources: [fastvideo.configs.pipelines.sd35.SD35Config]
+        sources:
+          - fastvideo.configs.pipelines.sd35.SD35Config
+          - fastvideo.configs.pipelines.zimage.ZImagePipelineConfig
       vae_arch:
-        sources: [fastvideo.configs.pipelines.sd35.SD35Config]
+        sources:
+          - fastvideo.configs.pipelines.sd35.SD35Config
+          - fastvideo.configs.pipelines.zimage.ZImagePipelineConfig
       expand_timesteps:
         sources:
           - fastvideo.configs.pipelines.wan.FastWan2_2_TI2V_5B_Config
@@ -421,6 +432,8 @@ surfaces:
       frame_receptive_field: "MagiHuman internal data-proxy receptive-field setting."
       image_conditioning: "MagiHuman preset variant marker for reference-image conditioning."
       ref_audio_offset: "MagiHuman internal data-proxy audio alignment offset."
+      scheduler_sigma_min: "Z-Image scheduler parity invariant; not part of the public typed inference API."
+      scheduler_use_reference_discrete_timesteps: "Z-Image scheduler parity invariant; not part of the public typed inference API."
       sr_local_attn_layers: "MagiHuman SR internal sparse-attention layer selection."
       text_offset: "MagiHuman internal data-proxy text alignment offset."
       vae_stride: "MagiHuman internal VAE/data-proxy stride setting."
@@ -432,12 +445,17 @@ surfaces:
     moved:
       image_path: request.inputs.image_path
       pil_image: request.inputs.pil_image
+      last_image: request.inputs.last_image
+      references: request.inputs.references
       video_path: request.inputs.video_path
+      latents: request.inputs.latents
+      audio_latents: request.inputs.audio_latents
       mouse_cond: request.inputs.mouse_cond
       keyboard_cond: request.inputs.keyboard_cond
       grid_sizes: request.inputs.grid_sizes
       pose: request.inputs.pose
       c2ws_plucker_emb: request.inputs.c2ws_plucker_emb
+      action_path: request.inputs.action_path
       refine_from: request.inputs.refine_from
       stage1_video: request.inputs.stage1_video
       prompt: request.prompt
@@ -447,6 +465,7 @@ surfaces:
       output_video_name: request.output.output_video_name
       num_videos_per_prompt: request.sampling.num_videos_per_prompt
       seed: request.sampling.seed
+      max_sequence_length: request.sampling.max_sequence_length
       num_frames: request.sampling.num_frames
       height: request.sampling.height
       width: request.sampling.width
@@ -456,7 +475,10 @@ surfaces:
       num_inference_steps: request.sampling.num_inference_steps
       num_inference_steps_sr: request.sampling.num_inference_steps_sr
       guidance_scale: request.sampling.guidance_scale
+      batch_cfg: request.sampling.batch_cfg
       guidance_scale_2: request.sampling.guidance_scale_2
+      cfg_normalization: request.sampling.cfg_normalization
+      cfg_truncation: request.sampling.cfg_truncation
       guidance_rescale: request.sampling.guidance_rescale
       use_embedded_guidance: request.sampling.use_embedded_guidance
       true_cfg_scale: request.sampling.true_cfg_scale
@@ -507,8 +529,6 @@ surfaces:
       inpaint_mask: request.extensions.stable_audio.inpaint_mask
     internal_only:
       data_type: "Derived from the request shape and not a public input."
-      latents: "Pre-generated diffusion latents supplied by parity/debug harnesses; not a public input."
-      max_sequence_length: "Model-specific text-encoder sequence cap; not part of the public typed inference API."
 
   sampling_param_extensions: {}
 

docs/distillation/dmd.md

@@ -2,6 +2,12 @@
 
 We introduce a new finetuning strategy - **Sparse-distill**, which jointly integrates **[DMD](https://arxiv.org/abs/2405.14867)** and **[VSA](https://arxiv.org/abs/2505.13389)** in a single training process. This approach combines the benefits of both distillation to shorten diffusion steps and sparse attention to reduce attention computation, enabling much faster video generation.
 
+!!! tip "Attn-QAT DMD2 workflow"
+    The modular trainer also provides a Wan2.1 MixKit recipe that first
+    fine-tunes with fake-quantized attention, then distills the student to
+    timesteps `[1000, 757, 522]` while teacher and critic remain on Flash
+    Attention. See [Attn-QAT Training](../training/attn_qat.md).
+
 ## 📊 Model Overview
 
 We provide two distilled models:

docs/getting_started/installation.md

@@ -5,6 +5,7 @@ FastVideo supports the following hardware platforms:
 
 - [NVIDIA CUDA](installation/gpu.md)
 - [NVIDIA DGX Spark / GB10 (ARM64 + CUDA 13)](installation/spark.md)
+  ([performance & tuning](installation/spark_performance.md))
 - [Apple silicon](installation/mps.md)
 
 ## Quick Installation
@@ -54,8 +55,10 @@ UV_TORCH_BACKEND=cu126 uv pip install -e .
 uv pip install flash-attn --no-build-isolation -v
 ```
 
-## Hardware Requirements
+## Requirements
 
+- **Python**: 3.10-3.12 is the tested and recommended range (the commands
+  above pin 3.12)
 - **NVIDIA GPUs**: CUDA 12.6+ with compute capability 7.0+
 - **Apple Silicon**: macOS 14.0+ with M1/M2/M3/M4 chips
 - **CPU**: x86_64 architecture (for CPU-only inference)

docs/getting_started/installation/gpu.md

@@ -134,4 +134,4 @@ If you're planning to contribute to FastVideo please see the following page:
 
 If you encounter any issues during installation, please open an issue on our [GitHub repository](https://github.com/hao-ai-lab/FastVideo).
 
-You can also join our [Slack community](https://join.slack.com/t/fastvideo/shared_invite/zt-38u6p1jqe-yDI1QJOCEnbtkLoaI5bjZQ) for additional support.
+You can also join our [Slack community](https://join.slack.com/t/fastvideo/shared_invite/zt-3f4lao1uq-u~Ipx6Lt4J27AlD2y~IdLQ) for additional support.

docs/getting_started/installation/mps.md

@@ -100,4 +100,4 @@ If you're planning to contribute to FastVideo please see the following page:
 
 If you encounter any issues during installation, please open an issue on our [GitHub repository](https://github.com/hao-ai-lab/FastVideo).
 
-You can also join our [Slack community](https://join.slack.com/t/fastvideo/shared_invite/zt-38u6p1jqe-yDI1QJOCEnbtkLoaI5bjZQ) for additional support.
+You can also join our [Slack community](https://join.slack.com/t/fastvideo/shared_invite/zt-3f4lao1uq-u~Ipx6Lt4J27AlD2y~IdLQ) for additional support.

docs/getting_started/installation/spark.md

@@ -134,9 +134,16 @@ uv pip install "https://github.com/mjun0812/flash-attention-prebuild-wheels/rele
 
 If you hit other issues, please open an issue on our
 [GitHub repository](https://github.com/hao-ai-lab/FastVideo). You can also join
-our [Slack community](https://join.slack.com/t/fastvideo/shared_invite/zt-38u6p1jqe-yDI1QJOCEnbtkLoaI5bjZQ)
+our [Slack community](https://join.slack.com/t/fastvideo/shared_invite/zt-3f4lao1uq-u~Ipx6Lt4J27AlD2y~IdLQ)
 for additional support.
 
+## Next: performance & tuning
+
+Installed and verified? See [DGX Spark: Performance & Tuning](spark_performance.md)
+for which models are practical on the GB10, what makes them faster, and what
+won't help on this hardware (and why) — so you don't spend a night tuning knobs
+that can't move here.
+
 ## Development Environment Setup
 
 If you're planning to contribute to FastVideo please see the

docs/getting_started/installation/spark_performance.md

@@ -0,0 +1,195 @@
+# DGX Spark (GB10): Performance & Tuning
+
+You have FastVideo [installed on a DGX Spark](spark.md) — this page is what to
+run next. It covers **which models are practical on the GB10, what actually
+makes them faster, and what won't help (and why)**, so you don't burn a night
+tuning knobs that can't move on this hardware.
+
+!!! tip "TL;DR"
+    - **Use distilled few-step models** (e.g. `FastVideo/FastWan2.1-T2V-1.3B-Diffusers`).
+      They run in ~40 s/video. Full-step models are 12–47 min on the GB10.
+    - On few-step models, **VAE decode is the bottleneck**, not attention — it's
+      bandwidth-bound on the Spark's unified memory.
+    - **bf16 VAE decode** is the real, lossless lever (FastVideo already turns it
+      on for Wan). **FlashAttention, linear quantization, and `torch.compile` of
+      the VAE give little or nothing here** — see the table below.
+    - Heavy runs can make the box unreachable — run generations with VAE tiling on
+      and `nice -n 19`. See [Running safely](#running-safely-dont-lock-the-box).
+
+## The hardware reality (this explains everything below)
+
+The GB10 pairs a Blackwell GPU (`sm_121`) with **128 GB of unified LPDDR5X memory
+(~270 GB/s) shared between CPU and GPU**. That bandwidth is roughly **10× below a
+datacenter GPU's HBM**. Two consequences drive every tuning decision:
+
+1. **Memory-bandwidth-bound stages hurt disproportionately.** VAE decode moves a
+   lot of data and becomes the dominant cost on short (few-step) generations.
+2. **Compute-bound stages scale with step count.** Full-step diffusion (50+
+   steps) is denoise-bound and simply takes a long time here.
+
+## Use distilled few-step models
+
+The single biggest lever on the GB10 is **model choice**. A 3-step distilled
+model is ~18× faster than the full-step version of the same architecture:
+
+| Model | Steps | Time / video | Bottleneck |
+|---|---|---|---|
+| FastWan2.1-T2V-1.3B (distilled) | 3 | **~40 s** | VAE decode |
+| Wan2.1-T2V-1.3B (full-step) | 50 | ~12 min | denoise |
+| Cosmos-Predict2.5-2B (full-step) | 51 | ~47 min | denoise |
+| LTX2.3-distilled (+audio) | 8 | ~6 min | mixed |
+
+The bottleneck flips from decode to denoise at around **4 steps**. Below that,
+you're paying mostly for VAE decode; above it, mostly for the denoising loop.
+
+!!! note "Few-step timings are noisy — measure in-process"
+    On a 3-step run, one-time per-process startup (Triton autotune, allocator
+    warmup) dominates and never amortizes, so single-run totals wobble ~±30%.
+    Compare levers **back-to-back in one process or as medians**, never as two
+    separate single runs. The [reproduction script](#reproduce-these-numbers)
+    does this for you.
+
+## bf16 VAE decode — the real lever (already on for Wan)
+
+Because few-step generation is decode-bound, VAE decode precision is where the
+time is. Decoding in **bf16 instead of fp32 is essentially lossless** (MS-SSIM
+~0.9999 vs fp32 on the identical latent) and ~1.14× faster — worth roughly
+5–7% end-to-end on a decode-bound few-step model.
+
+**FastVideo already defaults Wan's decode to bf16** (`vae_decode_precision="bf16"`,
+with encode kept at fp32), so for the recommended Wan/FastWan models there's
+nothing to set. If you run a model that still defaults to an fp32 decode, set the
+decode-only override yourself:
+
+```python
+from fastvideo.configs.pipelines.base import PipelineConfig
+
+pipeline_config = PipelineConfig.from_pretrained(model_id)
+pipeline_config.vae_decode_precision = "bf16"   # decode-only; leaves encode precision alone
+```
+
+Decode is output-only, so lowering its precision is safe. (Encode seeds the
+denoising trajectory for I2V/causal models, so that stays at the pipeline's
+default — don't lower `vae_precision` blindly for those.)
+
+## Memory: one unified 128 GB pool
+
+The GB10 has **no separate VRAM** — CPU and GPU share one 128 GB LPDDR5X pool
+(~118 GB usable). Two practical consequences:
+
+- **`nvidia-smi` reports memory as `[N/A]`** on the GB10, and the system "used"
+  figure conflates CPU + GPU + cache, so it's only a soft upper bound — treat the
+  whole 128 GB as one shared budget. For a per-run figure, use FastVideo's own
+  `peak_memory_mb` (reported on the generation result and by the performance
+  benchmark), which is measured inside the worker that runs the model.
+- **The 128 GB is a *working-set* ceiling, not storage** — the model cache lives
+  on the NVMe (3.7 TB, ample). What has to fit in 128 GB is the weights,
+  activations, and KV cache — and, critically, the **VAE decode buffers**, which
+  is why tiling matters
+  (an untiled high-res decode can spike the pool into swap and lock the box).
+
+The recommended few-step models are comfortable here: their weights are small
+(1.3–2 B) and few-step generation keeps activations modest — a Wan2.1-1.3B
+few-step generation peaks at **~8.4 GB** (measured), a small fraction of the pool.
+The pressure comes from **decode resolution/frames**, not the model — a
+1080p×121-frame untiled decode is what pushes the pool toward its ceiling, which
+is why VAE tiling stays
+on by default.
+
+## What helps vs. what doesn't on the GB10
+
+The honest summary — most "obvious" GPU optimizations don't move the needle on
+this hardware, for reasons specific to it:
+
+| Lever | Effect on the GB10 | Use it? |
+|---|---|---|
+| Distilled few-step model | ~18× vs full-step | ✅ **the primary lever** |
+| bf16 VAE decode | ~1.14×, lossless; ~5–7% e2e on few-step | ✅ default for Wan |
+| VSA (video sparse attention) | works out of the box (Triton kernel auto-selects on `sm_121`) | ✅ automatic |
+| Building FlashAttention | **no speedup** — Torch SDPA already hits an efficient flash kernel on `sm_121`, and FA2 ties it | ❌ not worth building |
+| `torch.compile` of the VAE decode | recompile storm (per-frame varying shapes) → ~1.1× | ❌ dead end |
+| Linear (fp8 / nvfp4) quantization on long-sequence models (e.g. Cosmos) | ~nothing — see below | ❌ wrong lever here |
+| FP4 attention (`ATTN_QAT_INFER`) | works on `sm_121` (runtime allowlist landed in #1647; kernel build is #1598); helps, but needs a QAT-trained checkpoint | ⚠️ opt-in — see below |
+| FP4 linear on short-sequence models (LTX2) | up to −24% denoise at 1080p (#1594) | ⚠️ model/resolution-dependent |
+
+### Why linear quantization is the wrong lever on long-sequence models
+
+Quantizing the linear (GEMM) layers is a natural first instinct, but on a
+long-sequence video model it buys almost nothing on the GB10. A video-DiT denoise
+step is dominated by **O(N²) attention** at these sequence lengths (tens of
+thousands of tokens); the linear layers are a small single-digit fraction of the
+work. Quantizing them faster leaves the attention-bound total essentially
+unchanged — measured at ~1% on Cosmos-2.5, i.e. noise, and full-step CFG models
+also lose quality to per-step quantization error.
+
+The same mechanism **does** help on **short-sequence** models: LTX2's aggressive
+VAE compression gives it short attention sequences, so FP4 linear reaches −24%
+there (#1594). The rule: **on the GB10, the lever that matters is attention
+(sparse or FP4), not the linear layers** — unless the model has short sequences.
+
+### FP4 on the GB10 (opt-in)
+
+Block-scaled FP4 works on `sm_121` under CUDA 13:
+
+- **FP4 attention** (`FASTVIDEO_ATTENTION_BACKEND=ATTN_QAT_INFER`, #1598) is
+  numerically correct on the GB10 and ~6% faster end-to-end generation, but it only preserves
+  quality on a **quantization-aware-distilled checkpoint** (e.g.
+  `FastVideo/FastWan-QAD-1.3B`) — stock weights aren't trained to tolerate it.
+- **FP4 linear** helps only where sequences are short (LTX2, above).
+
+The [`qad_fp4_ab.py`](#reproduce-these-numbers) harness reproduces the FP4
+attention A/B on the QAD checkpoint.
+
+## Running safely (don't lock the box)
+
+The GB10 is easy to make **unreachable** — a heavy build or an untiled high-res
+decode starves the ~20 ARM cores and unified memory, `sshd` can't get cycles, and
+you're locked out at *"Connection timed out during banner exchange"* until the box
+is power-cycled. To avoid it:
+
+- **Inference:** keep **VAE tiling on** (the default), use sane resolution/frames,
+  and run under `nice -n 19`:
+
+  ```bash
+  nice -n 19 nohup python your_script.py > run.log 2>&1 &
+  ```
+
+- **Builds** (flash-attn, kernel): `nice -n 19`, `MAX_JOBS=2`, `nohup`. Never a
+  bare foreground high-parallelism build.
+- Leave `*_cpu_offload` at the example defaults — "CPU" offload is the *same*
+  unified RAM on the GB10, so the win is tiling + sane resolution, not offloading.
+
+## Gotchas specific to the GB10
+
+A few things that surprise people on this box (beyond the memory notes above):
+
+- **Don't force `TORCH_SDPA` on a VSA checkpoint** (FastWan, LTX2.3-distilled).
+  The SDPA path builds a model without the gate weights the checkpoint carries and
+  fails to load. Run the model natively — VSA auto-routes to its Triton kernel on
+  `sm_121`.
+- **Few-step timings are noisy run-to-run** (~±30%) — one-time startup dominates a
+  3-step run. Compare in-process / as medians, never two separate single runs (the
+  benchmark script does this).
+- **`nvidia-smi` shows `[N/A]` for memory** — see [Memory](#memory-one-unified-128-gb-pool).
+- **Cosmos-2.5** uses a Qwen2.5-VL text encoder; make sure you're on a FastVideo
+  build recent enough to include its `transformers`-compatibility handling before
+  running it.
+
+## Reproduce these numbers
+
+Two scripts under `examples/inference/optimizations/` reproduce the claims on
+your own GB10:
+
+```bash
+# Headline: few-step generation timing (median) + the bf16-vs-fp32 decode A/B.
+# FASTVIDEO_STAGE_LOGGING=1 also prints the denoise / decode / text split.
+FASTVIDEO_STAGE_LOGGING=1 nice -n 19 \
+    python examples/inference/optimizations/spark_benchmark.py
+
+# FP4 attention quality/speed A/B on the QAD checkpoint (one arm per run).
+QAD_LINEAR=0 FASTVIDEO_ATTENTION_BACKEND=ATTN_QAT_INFER nice -n 19 \
+    python examples/inference/optimizations/qad_fp4_ab.py
+```
+
+See also the [Optimizations](../../inference/optimizations.md) reference for the
+full list of attention backends and quantization options.

docs/index.md

@@ -5,7 +5,7 @@
 </div>
 
 <div style="text-align: center;">
-<strong>FastVideo is a unified inference and post-training framework for accelerated video generation.</strong>
+<strong>FastVideo is a unified post-training and real-time inference framework for accelerated video generation.</strong>
 </div>
 
 <div style="text-align: center;">
@@ -25,14 +25,23 @@ FastVideo is an inference and post-training framework for diffusion models. It f
 
 FastVideo has the following features:
 
+- End-to-end post-training support for bidirectional and autoregressive models
+  - Full finetuning and LoRA [finetuning](training/finetune.md) for state-of-the-art open video DiTs
+  - [Data preprocessing pipeline](training/data_preprocess.md) for video, image, and text data
+  - [Distribution Matching Distillation (DMD2)](distillation/dmd.md) stepwise distillation
+  - Sparse attention with [Video Sparse Attention](attention/vsa/index.md)
+  - [Sparse distillation](https://hao-ai-lab.github.io/blogs/fastvideo_post_training/) to achieve >50x denoising speedup
+  - [Attn-QAT training](training/attn_qat.md) for quantization-aware post-training
+  - Causal distillation through Self-Forcing
+  - Scalable training with FSDP2, sequence parallelism, and selective activation checkpointing
+  - See the [training overview](training/overview.md) for the full training workflow
 - State-of-the-art performance optimizations for inference
-  - [Sliding Tile Attention](attention/sta/index.md)
-  - [Sage Attention](https://arxiv.org/abs/2410.02367)
-- E2E post-training support
-  - Data preprocessing pipeline for video data
-  - [Sparse distillation](https://hao-ai-lab.github.io/blogs/fastvideo_post_training/) for Wan2.1 and Wan2.2 using [Video Sparse Attention](https://arxiv.org/pdf/2505.13389) and [Distribution Matching Distillation](https://tianweiy.github.io/dmd2/)
-  - Support full finetuning and LoRA finetuning for state-of-the-art open video DiTs.
-  - Scalable training with FSDP2, sequence parallelism, and selective activation checkpointing, with near linear scaling to 64 GPUs.
+  - Sequence parallelism for distributed inference
+  - Multiple state-of-the-art [attention backends](attention/index.md)
+  - User-friendly [CLI](inference/cli.md) and Python API
+  - See the [support matrix](inference/support_matrix.md) for supported models and [optimizations](inference/optimizations.md) for the full list
+- Realtime video generation and editing
+  - [Dreamverse](https://github.com/hao-ai-lab/FastVideo/tree/main/apps/dreamverse): stream and "vibe direct" video in realtime ([live demo](https://dreamverse.fastvideo.org/))
 
 ## Documentation
 

docs/inference/add_pipeline.md

@@ -11,7 +11,7 @@ This guide explains how to implement a custom diffusion pipeline in FastVideo, l
 4. **Register Your Pipeline** - Make it discoverable by the framework
 5. **Configure Your Pipeline** - (Coming soon)
 
-Need help? Join our [Slack community](https://join.slack.com/t/fastvideo/shared_invite/zt-38u6p1jqe-yDI1QJOCEnbtkLoaI5bjZQ).
+Need help? Join our [Slack community](https://join.slack.com/t/fastvideo/shared_invite/zt-3f4lao1uq-u~Ipx6Lt4J27AlD2y~IdLQ).
 
 ## Step 1: Pipeline Modules
 

docs/inference/inference_quick_start.md

@@ -4,10 +4,11 @@ This page contains step-by-step instructions to get you quickly started with vid
 
 ## Requirements
 
-- **OS**: Linux (Tested on Ubuntu 22.04+)
+- **OS**: Linux (tested on Ubuntu 22.04+), or macOS on Apple silicon via the
+  [MPS installation guide](../getting_started/installation/mps.md)
 - **Python**: 3.10-3.12
-- **CUDA**: 12.6 or 13.0
-- **GPU**: At least one NVIDIA GPU
+- **CUDA**: 12.6 or 13.0 (NVIDIA GPUs)
+- **GPU**: At least one NVIDIA GPU, or an Apple silicon chip with MPS
 
 ## Installation
 
@@ -134,5 +135,4 @@ If the generated video doesn't match your prompt:
 - Learn about [Advanced Inference Configurations](configuration.md)
 - Learn about using [Optimizations](optimizations.md)
 - See [Examples](examples/examples_inference_index.md) for more usage scenarios
-- Join our [Community Discord](https://discord.gg/JA7cksDz86).
-- Join our [Community Slack](https://join.slack.com/t/fastvideo/shared_invite/zt-38u6p1jqe-yDI1QJOCEnbtkLoaI5bjZQ).
+- Join our [Community Slack](https://join.slack.com/t/fastvideo/shared_invite/zt-3f4lao1uq-u~Ipx6Lt4J27AlD2y~IdLQ).

docs/inference/optimizations.md

@@ -3,6 +3,12 @@
 
 This page describes the various options for speeding up generation times in FastVideo.
 
+!!! note "On a DGX Spark (GB10)?"
+    Several options on this page behave differently on the GB10's unified-memory
+    hardware — some give little or nothing there. See
+    [DGX Spark: Performance & Tuning](../getting_started/installation/spark_performance.md)
+    for what actually helps on that platform and why.
+
 ## Table of Contents
 
 - Optimized Attention Backends
@@ -119,6 +125,22 @@ pip install "nvidia-cutlass-dsl>=4.5.2" apache-tvm-ffi flashinfer-python
 The `--no-deps` flag prevents upgrading torch/torchvision. Use the supported
 PyTorch 2.12.0 and CUDA 13 environment for this kernel.
 
+Branch-to-`nvidia-cutlass-dsl` compatibility (the fork tracks the CuTe DSL API
+surface closely):
+
+| fork branch | cutlass-dsl | notes |
+|---|---|---|
+| `fp4` | `==4.4.2` (+ `nvidia-cutlass-dsl-libs-base==4.4.2`) | validated set on GB200: `quack-kernels==0.4.1`, `flashinfer-python==0.6.8`, `CUTE_DSL_ENABLE_TVM_FFI=1`, `FASTVIDEO_FA4=1` |
+| `fix/cutlass-dsl-4.5` | `>=4.5.2` | carries the `cute.core.ThrMma` -> `cute.ThrMma` fix |
+| any | 4.6-era | unsupported: `cute.make_fragment` was removed at module level; fails at CuTe JIT trace |
+
+`FASTVIDEO_FA4=1` is required alongside the fork: it ships no compiled
+FlashAttention-2, so dense attention paths raise ImportError without the FA4
+opt-in. The same kernel also serves `ATTN_QAT_INFER` on sm_100a/sm_103a
+(datacenter Blackwell) — the selection log's receipt line
+(`ATTN_QAT_INFER resolved: ...`) records the arch, kernel, and quantization
+mode that actually bound.
+
 #### Usage
 
 Enable FP4 attention via the `--nvfp4_fa4` flag:

docs/inference/support_matrix.md

@@ -13,6 +13,97 @@ For the canonical, code-level list of model IDs recognized by
     We do this because we believe VSA is strictly better than STA for the
     actively maintained `main` inference path.
 
+## Registered Model IDs
+
+Every Hugging Face model ID registered in `fastvideo/registry.py` on `main`
+(commit `8d89f30d`), grouped by family. Any ID below can
+be passed to `VideoGenerator.from_pretrained(...)`; FastVideo resolves the
+matching pipeline and sampling defaults. The **Family** column is a
+documentation grouping: it follows each registration's declared `model_family`,
+except `black-forest-labs/FLUX.1-dev`, which declares none and is listed under
+`flux` for readability. The **Workloads** column shows each
+registration's declared `workload_types`; `—` means the entry is registered
+without a UI workload option but is still loadable by ID. The **Example**
+column links a runnable script in `examples/inference/basic/` where one exists.
+
+| Family | HuggingFace Model ID | Workloads | Example |
+|--------|----------------------|-----------|---------|
+| cosmos | `nvidia/Cosmos-Predict2-2B-Video2World` | T2V | — |
+| cosmos25 | `KyleShao/Cosmos-Predict2.5-2B-Diffusers` | T2V | [basic_cosmos2_5_t2w.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_cosmos2_5_t2w.py) |
+| cosmos25 | `nvidia/Cosmos-Predict2.5-14B` | T2V | [basic_cosmos2_5_t2w.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_cosmos2_5_t2w.py) |
+| dreamx_world | `FastVideo/DreamX-World-5B-Cam-Diffusers` | I2V | [basic_dreamx_world.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_dreamx_world.py) |
+| dreamx_world | `FastVideo/DreamX-World-5B-Diffusers` | I2V | [basic_dreamx_world.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_dreamx_world.py) |
+| flux | `black-forest-labs/FLUX.1-dev` | T2I | [basic_flux_dev.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_flux_dev.py) |
+| flux2 | `black-forest-labs/FLUX.2-klein-4B`<br>`black-forest-labs/FLUX.2-klein-9B` | T2I | [basic_flux2_klein.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_flux2_klein.py) |
+| flux2 | `black-forest-labs/FLUX.2-dev` | T2I | [basic_flux2.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_flux2.py) |
+| gamecraft | `FastVideo/HunyuanGameCraft-Diffusers` | I2V | [basic_gamecraft.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_gamecraft.py) |
+| gen3c | `FastVideo/GEN3C-Cosmos-7B-Diffusers` | T2V | [basic_gen3c.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_gen3c.py) |
+| glm_image | `zai-org/GLM-Image` | T2I | [basic_glm_image.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_glm_image.py) |
+| hunyuan | `hunyuanvideo-community/HunyuanVideo` | T2V | — |
+| hunyuan | `FastVideo/FastHunyuan-diffusers` | T2V | — |
+| hunyuan15 | `hunyuanvideo-community/HunyuanVideo-1.5-Diffusers-480p_t2v` | T2V | [basic_hy15.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_hy15.py) |
+| hunyuan15 | `hunyuanvideo-community/HunyuanVideo-1.5-Diffusers-480p_i2v_step_distilled` | I2V | [basic_hy15.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_hy15.py) |
+| hunyuan15 | `hunyuanvideo-community/HunyuanVideo-1.5-Diffusers-720p_t2v` | T2V | [basic_hy15.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_hy15.py) |
+| hunyuan15 | `hunyuanvideo-community/HunyuanVideo-1.5-Diffusers-720p_i2v_distilled` | I2V | [basic_hy15.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_hy15.py) |
+| hunyuan15 | `weizhou03/HunyuanVideo-1.5-Diffusers-1080p`<br>`weizhou03/HunyuanVideo-1.5-Diffusers-1080p-2SR` | — | [basic_hy15_1080p.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_hy15_1080p.py) |
+| hyworld | `FastVideo/HY-WorldPlay-Bidirectional-Diffusers` | — | [basic_hyworld.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_hyworld.py) |
+| kandinsky5 | `kandinskylab/Kandinsky-5.0-T2V-Lite-sft-5s-Diffusers` | T2V | [basic_kandinsky5_t2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_kandinsky5_t2v.py) |
+| kandinsky5 | `kandinskylab/Kandinsky-5.0-T2V-Pro-sft-5s-Diffusers` | T2V | [basic_kandinsky5_t2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_kandinsky5_t2v.py) |
+| kandinsky5 | `kandinskylab/Kandinsky-5.0-T2V-Lite-distilled16steps-5s-Diffusers` | T2V | [basic_kandinsky5_t2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_kandinsky5_t2v.py) |
+| kandinsky5 | `kandinskylab/Kandinsky-5.0-T2V-Pro-distilled-5s-Diffusers` | T2V | [basic_kandinsky5_t2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_kandinsky5_t2v.py) |
+| kandinsky5 | `kandinskylab/Kandinsky-5.0-I2V-Lite-5s-Diffusers` | I2V | [basic_kandinsky5_i2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_kandinsky5_i2v.py) |
+| kandinsky5 | `kandinskylab/Kandinsky-5.0-I2V-Pro-sft-5s-Diffusers` | I2V | [basic_kandinsky5_i2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_kandinsky5_i2v.py) |
+| kandinsky5 | `kandinskylab/Kandinsky-5.0-I2V-Pro-distilled-5s-Diffusers` | I2V | [basic_kandinsky5_i2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_kandinsky5_i2v.py) |
+| lingbot_video | `FastVideo/LingBot-Video-MoE-30B-A3B-Diffusers` | T2V | [basic_lingbot_video.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_lingbot_video.py) |
+| lingbot_video | `FastVideo/LingBot-Video-Dense-1.3B-Diffusers` | T2V | [basic_lingbot_video.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_lingbot_video.py) |
+| lingbotworld | `FastVideo/LingBot-World-Base-Cam-Diffusers` | I2V | [basic_lingbotworld_base_cam.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_lingbotworld_base_cam.py) |
+| lingbotworld2 | `robbyant/lingbot-world-v2-14b-causal-fast` | I2V | [basic_lingbotworld2_causal_fast.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_lingbotworld2_causal_fast.py) |
+| longcat | `FastVideo/LongCat-Video-T2V-Diffusers` | T2V | [basic_longcat_t2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_longcat_t2v.py) |
+| longcat | `FastVideo/LongCat-Video-I2V-Diffusers` | I2V | [basic_longcat_i2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_longcat_i2v.py) |
+| longcat | `FastVideo/LongCat-Video-VC-Diffusers` | — | [basic_longcat_vc.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_longcat_vc.py) |
+| ltx2 | `FastVideo/LTX2-Distilled-Diffusers`<br>`FastVideo/LTX2.3-Distilled-Diffusers`<br>`FastVideo/LTX-2.3-Distilled-Diffusers` | T2V | [basic_ltx2_distilled.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_ltx2_distilled.py) |
+| ltx2 | `Lightricks/LTX-2.3`<br>`FastVideo/LTX2.3-base`<br>`FastVideo/LTX2.3-Diffusers` | T2V | [basic_ltx2.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_ltx2.py) |
+| ltx2 | `Lightricks/LTX-2`<br>`FastVideo/LTX2-base`<br>`FastVideo/LTX2-Diffusers` | T2V | [basic_ltx2.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_ltx2.py) |
+| matrixgame | `FastVideo/Matrix-Game-2.0-Base-Distilled-Diffusers`<br>`FastVideo/Matrix-Game-2.0-GTA-Distilled-Diffusers`<br>`FastVideo/Matrix-Game-2.0-TempleRun-Distilled-Diffusers`<br>`FastVideo/Matrix-Game-2.0-Base-Diffusers`<br>`FastVideo/Matrix-Game-2.0-GTA-Diffusers`<br>`FastVideo/Matrix-Game-2.0-TempleRun-Diffusers`<br>`mignonjia/mg_longtuning_distilled_zelda`<br>`mignonjia/mg_sf_distilled_zelda_1k_steps`<br>`mignonjia/mg_sf_distilled_zelda`<br>`mignonjia/mg_causal_zelda`<br>`mignonjia/mg_bidirectional_zelda` | I2V | [basic_matrixgame2.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_matrixgame2.py) |
+| matrixgame | `FastVideo/Matrix-Game-3.0-Base-Distilled-Diffusers` | I2V | [basic_matrixgame3.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_matrixgame3.py) |
+| minimax_h3 | `MiniMaxAI/MiniMax-H3` | T2V, I2V | [T2VA](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_minimax_h3_t2v.py)<br>[FL2VA](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_minimax_h3_fl2va.py)<br>[Ref2VA](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_minimax_h3_ref2va.py) |
+| sd35 | `stabilityai/stable-diffusion-3.5-medium` | T2I | [basic_sd35_t2i.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_sd35_t2i.py) |
+| stable_audio | `FastVideo/stable-audio-open-1.0-Diffusers` | T2V | [basic_stable_audio.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_stable_audio.py) |
+| stable_audio | `FastVideo/stable-audio-open-small-Diffusers` | T2V | [basic_stable_audio_small.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_stable_audio_small.py) |
+| turbodiffusion | `loayrashid/TurboWan2.1-T2V-1.3B-Diffusers` | T2V | [basic_turbodiffusion.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_turbodiffusion.py) |
+| turbodiffusion | `loayrashid/TurboWan2.1-T2V-14B-Diffusers` | T2V | [basic_turbodiffusion_14b.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_turbodiffusion_14b.py) |
+| turbodiffusion | `loayrashid/TurboWan2.2-I2V-A14B-Diffusers` | I2V | [basic_turbodiffusion_i2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_turbodiffusion_i2v.py) |
+| wan | `Wan-AI/Wan2.1-T2V-1.3B-Diffusers` | T2V | [basic.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic.py) |
+| wan | `Wan-AI/Wan2.1-T2V-14B-Diffusers`<br>`FastVideo/Wan2.1-VSA-T2V-14B-720P-Diffusers` | T2V | — |
+| wan | `Wan-AI/Wan2.1-I2V-14B-480P-Diffusers` | I2V | — |
+| wan | `Wan-AI/Wan2.1-I2V-14B-720P-Diffusers` | I2V | — |
+| wan | `weizhou03/Wan2.1-Fun-1.3B-InP-Diffusers` | I2V | — |
+| wan | `IRMChen/Wan2.1-Fun-1.3B-Control-Diffusers` | — | [basic_wan2_2_Fun.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_wan2_2_Fun.py) |
+| wan | `FastVideo/FastWan2.1-T2V-1.3B-Diffusers`<br>`FastVideo/FastWan2.1-T2V-14B-480P-Diffusers` | T2V | [basic_dmd.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_dmd.py) |
+| wan | `Wan-AI/Wan2.2-TI2V-5B-Diffusers` | T2V, I2V | [basic_wan2_2_ti2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_wan2_2_ti2v.py) |
+| wan | `FastVideo/FastWan2.2-TI2V-5B-FullAttn-Diffusers`<br>`FastVideo/FastWan2.2-TI2V-5B-Diffusers` | T2V, I2V | [basic_dmd.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_dmd.py) |
+| wan | `decart-ai/Lucy-Edit-Dev`<br>`decart-ai/Lucy-Edit-1.1-Dev` | — | [basic_lucy_edit.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_lucy_edit.py) |
+| wan | `Wan-AI/Wan2.2-T2V-A14B-Diffusers` | T2V | [basic_wan2_2.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_wan2_2.py) |
+| wan | `Wan-AI/Wan2.2-I2V-A14B-Diffusers` | I2V | [basic_wan2_2_i2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_wan2_2_i2v.py) |
+| wan | `wlsaidhi/SFWan2.1-T2V-1.3B-Diffusers` | T2V | [basic_self_forcing_causal.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_self_forcing_causal.py) |
+| wan | `rand0nmr/SFWan2.2-T2V-A14B-Diffusers` | T2V | [basic_self_forcing_causal_wan2_2_t2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_self_forcing_causal_wan2_2_t2v.py) |
+| wan | `FastVideo/SFWan2.2-I2V-A14B-Preview-Diffusers` | I2V | [basic_self_forcing_causal_wan2_2_i2v.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_self_forcing_causal_wan2_2_i2v.py) |
+| zimage | `Tongyi-MAI/Z-Image-Turbo` | T2I | [basic_zimage.py](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_zimage.py) |
+
+**Note (stable_audio)**: the Stable Audio Open pipelines generate audio
+(`StableAudioT2AConfig` / `StableAudioOpenSmallConfig`); they are registered
+under the generic T2V workload option in the registry.
+
+**Note (MiniMax H3)**: T2VA, FL2VA, and Ref2VA all generate video with stereo
+audio. Use the Ref2VA example when passing ordered image, video, or audio
+references.
+
+**Note (Wan-VACE)**: not currently supported — no VACE pipeline or registered
+model ID exists on `main`
+([#1435](https://github.com/hao-ai-lab/FastVideo/issues/1435)). The closest
+supported path is the Wan2.1-Fun control pipeline
+(`IRMChen/Wan2.1-Fun-1.3B-Control-Diffusers`).
+
 The symbols used have the following meanings:
 
 - ✅ = Full compatibility
@@ -25,6 +116,9 @@ The `HuggingFace Model ID` can be passed directly to
 `from_pretrained()`. FastVideo then uses model-specific default settings for
 pipeline initialization and sampling.
 
+Registered models absent from this table have not been validated against these
+optimizations: absence means **untested**, not incompatible.
+
 <style>
   /* Target tables in this section */
   #models-x-optimization + p + table {
@@ -56,7 +150,7 @@ pipeline initialization and sampling.
 | Model Name | HuggingFace Model ID | Resolutions | TeaCache | Sliding Tile Attn (Legacy Branch) | Sage Attn | VSA | BSA |
 |------------|---------------------|-------------|----------|-------------------|-----------|-----|-----|
 | FastWan2.1 T2V 1.3B | `FastVideo/FastWan2.1-T2V-1.3B-Diffusers` | 480P | ⭕ | ⭕ | ⭕ | ✅ | ⭕ |
-| FastWan2.2 TI2V 5B Full Attn* | `FastVideo/FastWan2.2-TI2V-5B-FullAttn-Diffusers` | 720P | ⭕ | ⭕ | ⭕ | ✅ | ⭕ |
+| FastWan2.2 TI2V 5B Full Attn | `FastVideo/FastWan2.2-TI2V-5B-FullAttn-Diffusers` | 720P | ⭕ | ⭕ | ⭕ | ✅ | ⭕ |
 | Wan2.2 TI2V 5B | `Wan-AI/Wan2.2-TI2V-5B-Diffusers` | 720P | ⭕ | ⭕ | ✅ | ⭕ | ⭕ |
 | DreamX-World 5B Cam | `FastVideo/DreamX-World-5B-Cam-Diffusers` | 480P | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ |
 | DreamX-World 5B AR | `FastVideo/DreamX-World-5B-Diffusers` | 704px1280p | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ |
@@ -65,14 +159,14 @@ pipeline initialization and sampling.
 | Wan2.2 I2V A14B | `Wan-AI/Wan2.2-I2V-A14B-Diffusers` | 480P<br>720P | ❌ | ❌ | ✅ | ⭕ | ⭕ |
 | HunyuanVideo | `hunyuanvideo-community/HunyuanVideo` | 720px1280p<br>544px960p | ❌ | ✅ | ✅ | ⭕ | ⭕ |
 | FastHunyuan | `FastVideo/FastHunyuan-diffusers` | 720px1280p<br>544px960p | ❌ | ✅ | ✅ | ⭕ | ⭕ |
-| Wan2.1 T2V 1.3B | `Wan-AI/Wan2.1-T2V-1.3B-Diffusers` | 480P | ✅ | ✅* | ✅ | ⭕ | ⭕ |
-| Wan2.1 T2V 14B | `Wan-AI/Wan2.1-T2V-14B-Diffusers` | 480P, 720P | ✅ | ✅* | ✅ | ⭕ | ⭕ |
-| Wan2.1 I2V 480P | `Wan-AI/Wan2.1-I2V-14B-480P-Diffusers` | 480P | ✅ | ✅* | ✅ | ⭕ | ⭕ |
+| Wan2.1 T2V 1.3B | `Wan-AI/Wan2.1-T2V-1.3B-Diffusers` | 480P | ✅ | ✅ | ✅ | ⭕ | ⭕ |
+| Wan2.1 T2V 14B | `Wan-AI/Wan2.1-T2V-14B-Diffusers` | 480P, 720P | ✅ | ✅ | ✅ | ⭕ | ⭕ |
+| Wan2.1 I2V 480P | `Wan-AI/Wan2.1-I2V-14B-480P-Diffusers` | 480P | ✅ | ✅ | ✅ | ⭕ | ⭕ |
 | Wan2.1 I2V 720P | `Wan-AI/Wan2.1-I2V-14B-720P-Diffusers` | 720P | ✅ | ✅ | ✅ | ⭕ | ⭕ |
 | TurboWan2.1 T2V 1.3B | `loayrashid/TurboWan2.1-T2V-1.3B-Diffusers` | 480P | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ |
 | TurboWan2.1 T2V 14B | `loayrashid/TurboWan2.1-T2V-14B-Diffusers` | 480P, 720P | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ |
 | TurboWan2.2 I2V A14B | `loayrashid/TurboWan2.2-I2V-A14B-Diffusers` | 480P<br>720P | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ |
-| LongCat T2V 13.6B | See note** | 480P<br>720P | ❌ | ❌ | ❌ | ⭕ | ✅ |
+| LongCat T2V 13.6B | `FastVideo/LongCat-Video-T2V-Diffusers` | 480P<br>720P | ❌ | ❌ | ❌ | ⭕ | ✅ |
 | Matrix Game 2.0 Base Distilled | `FastVideo/Matrix-Game-2.0-Base-Distilled-Diffusers` | 352x640 | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ |
 | Matrix Game 2.0 GTA Distilled | `FastVideo/Matrix-Game-2.0-GTA-Distilled-Diffusers` | 352x640 | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ |
 | Matrix Game 2.0 TempleRun Distilled | `FastVideo/Matrix-Game-2.0-TempleRun-Distilled-Diffusers` | 352x640 | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ |
@@ -98,6 +192,21 @@ resolve default pipeline and sampling configuration for it.
 `FastVideo/GEN3C-Cosmos-7B-Diffusers`) or convert locally with
 `scripts/checkpoint_conversion/convert_gen3c_to_fastvideo.py`.
 
+## Hardware and OS
+
+Per the installation guides:
+
+- **NVIDIA GPU (x86_64)** — CUDA 12.6 or 13.0; see the
+  [GPU install guide](../getting_started/installation/gpu.md).
+- **NVIDIA DGX Spark (GB10, aarch64)** — CUDA 13, from-source kernel build; see
+  the [DGX Spark install guide](../getting_started/installation/spark.md).
+- **Apple silicon (MPS)** — macOS 14 or newer; see the
+  [MPS install guide](../getting_started/installation/mps.md) and
+  [`basic_mps.py`](https://github.com/hao-ai-lab/FastVideo/blob/main/examples/inference/basic/basic_mps.py).
+
+Optimization-specific hardware constraints (e.g. STA requiring Hopper) are
+listed under [Special requirements](#special-requirements).
+
 ## Special requirements
 
 ### Sliding Tile Attention

docs/training/attn_qat.md

@@ -0,0 +1,147 @@
+# Attn-QAT Training
+
+Attn-QAT simulates low-bit attention during training while keeping the rest of
+the training method unchanged. In the modular `fastvideo/train` framework it is
+a per-role model option, not a separate training method: supervised fine-tuning
+and DMD2 still own their losses and optimizer cadence.
+
+This guide covers the QAD Wan2.1-T2V-1.3B MixKit workflow:
+
+1. run a 4,000-step supervised Attn-QAT fine-tune;
+2. export the stage-1 DCP checkpoint to Diffusers format; and
+3. distill the student to three denoising steps with DMD2.
+
+The ready-to-run configs and wrappers are in
+`examples/train/scenario/qad_wan2_1_mixkit/`.
+
+## Role-local attention backends
+
+A DMD2 run owns three independent model roles. Configure the attention backend
+on each role so fake quantization is applied only to the student:
+
+```yaml
+models:
+  student:
+    attention_backend: ATTN_QAT_TRAIN
+  teacher:
+    attention_backend: FLASH_ATTN
+  critic:
+    attention_backend: FLASH_ATTN
+```
+
+The override is active only while that role's transformer is constructed, then
+the previous process-wide backend is restored. This lets student, teacher, and
+critic use different implementations in one process. Invalid role-level names
+fail during configuration instead of silently selecting another backend.
+
+See [Training Infrastructure](train_infra.md) for the complete model-role
+configuration reference.
+
+## Prerequisites
+
+- Install FastVideo and make the `fastvideo-kernel` Python package importable.
+  `ATTN_QAT_TRAIN` intentionally fails instead of falling back to dense
+  attention when its kernel cannot be loaded.
+- Prepare the precomputed MixKit VAE latents and text embeddings.
+- Run the commands below from the repository root. The supplied recipe expects
+  four GPUs by default; set `NUM_GPUS` to override it.
+
+Download the published preprocessed dataset:
+
+```bash
+bash examples/datasets/mixkit/download_dataset.sh
+```
+
+## Stage 1: supervised Attn-QAT fine-tuning
+
+The stage-1 config uses `ATTN_QAT_TRAIN` on the student, sequence parallelism
+across four GPUs, FP32 master weights, and 4,000 optimizer steps:
+
+```bash
+NUM_GPUS=4 \
+  bash examples/train/scenario/qad_wan2_1_mixkit/run_stage1.sh
+```
+
+Pass a dataset directory as the first positional argument when it differs from
+the default:
+
+```bash
+NUM_GPUS=4 \
+  bash examples/train/scenario/qad_wan2_1_mixkit/run_stage1.sh \
+  /path/to/combined_parquet_dataset
+```
+
+The wrapper calls `examples/train/run.sh`; the YAML file remains the source of
+truth for optimizer, validation, checkpointing, and distributed settings.
+
+## Export the stage-1 checkpoint
+
+Modular training checkpoints use Distributed Checkpoint (DCP) format. Export
+the student before using it to initialize stage 2:
+
+```bash
+bash examples/train/scenario/qad_wan2_1_mixkit/export_stage1.sh \
+  checkpoints/wan_t2v_qat_finetune/checkpoint-4000 \
+  checkpoints/wan_t2v_qat_finetune/diffusers
+```
+
+Both arguments are optional; the command above shows their defaults.
+
+## Stage 2: three-step DMD2 distillation
+
+Stage 2 loads the exported student weights, keeps Attn-QAT on the student, and
+uses Flash Attention for the teacher and critic:
+
+```bash
+NUM_GPUS=4 \
+  bash examples/train/scenario/qad_wan2_1_mixkit/run_stage2.sh \
+  data/HD-Mixkit-Finetune-Wan/combined_parquet_dataset \
+  checkpoints/wan_t2v_qat_finetune/diffusers/transformer/model.safetensors
+```
+
+The migrated recipe preserves these behaviors:
+
+| Behavior | Modular configuration |
+|---|---|
+| Student fake-quantized attention | `models.student.attention_backend: ATTN_QAT_TRAIN` |
+| Teacher and critic full-precision attention | Role-local `FLASH_ATTN` |
+| Generator update every five critic steps | `method.generator_update_interval: 5` |
+| Three-step rollout | `method.dmd_denoising_steps: [1000, 757, 522]` |
+| Score timestep range | `method.min_timestep_ratio: 0.02`, `max_timestep_ratio: 0.98` |
+| Legacy guidance `cond + 2(cond - uncond)` | Standard CFG scale `3.0` |
+| Stage handoff | DCP checkpoint to Diffusers export to student override weights |
+
+The timestep ratios apply to randomly sampled teacher and critic score
+timesteps; `dmd_denoising_steps` separately controls the student rollout. See
+[DMD Distillation](../distillation/dmd.md) for general DMD concepts.
+
+## Architecture-specific Triton routing
+
+The training kernel is runtime-JIT-compiled Triton code and selects its route on
+every call. It supports different query and key/value sequence lengths for
+cross-attention; key and value must have the same sequence length.
+
+| Hardware/configuration | Route |
+|---|---|
+| SM100, validated non-causal BF16 QAT configuration with head dimension 128 | Large-tile forward and split 64x64 backward; optimized backward requires a 16-aligned KV length |
+| SM120, including RTX 5090 | Previous forward tiling with joined quantized/STE P@V operations and a shallower backward pipeline for long sequences |
+| Unsupported configurations | Previous Triton implementation |
+
+Warp specialization is disabled automatically on SM100 and SM120 because the
+Triton 3.7 NVWS compiler pass aborts for this kernel on Blackwell. No user
+setting is required.
+
+The available tuning and comparison controls are:
+
+| Environment variable | Default | Effect |
+|---|---|---|
+| `FASTVIDEO_ATTN_QAT_FWD_MODE` | `fast` | Selects `fast`, `balanced`, or `reference` forward tiling on the SM100 optimized route |
+| `FASTVIDEO_ATTN_QAT_FWD_EXACT_M` | `0` | Set to `1` to recompute reference-order softmax statistics and keep `dV` bitwise-compatible on the SM100 optimized route |
+| `FASTVIDEO_ATTN_QAT_SM100_OPTIMIZED` | `1` | Set to `0` to force the previous SM100 forward and backward for comparison |
+| `FASTVIDEO_ATTN_QAT_SM120_JOIN_QAT_PV` | `1` | Set to `0` to compare SM120 against the split P@V path |
+
+The first invocation JIT-compiles the selected configuration; later calls reuse
+the Triton cache. To measure the production shape, run
+`python benchmarks/benchmark_attn_qat_train.py` from `fastvideo-kernel/`.
+
+For import and backend-selection failures, see [Debugging](../utilities/debugging.md).

docs/training/finetune.md

@@ -62,6 +62,18 @@ bash examples/training/finetune/wan_t2v_1.3B/crush_smol/finetune_t2v.sh
 - Gradient checkpointing: `--enable_gradient_checkpointing_type "full"`
 - Memory scaling: Increase `--sp_size` or reduce `--num_latent_t` to fit in memory
 
+## Attention Quantization-Aware Training
+
+Attn-QAT fine-tunes a model while simulating low-bit attention in the forward
+and backward passes. The modular trainer can select the backend per model role,
+so a later DMD2 stage can keep fake quantization on the student while the
+teacher and critic use Flash Attention.
+
+The ready-to-run Wan2.1 MixKit workflow includes supervised fine-tuning,
+checkpoint export, and three-step DMD2 distillation:
+
+**→ [Follow the Attn-QAT training guide](attn_qat.md)**
+
 ## LoRA Finetuning
 
 LoRA (Low-Rank Adaptation) trains lightweight adapters while keeping the base model frozen. This significantly reduces memory usage and training time.
@@ -166,10 +178,11 @@ Ready-to-run training scripts are available for multiple models:
 | Wan2.1 I2V 14B | I2V | `examples/training/finetune/wan_i2v_14B_480p/crush_smol/` |
 | Wan2.1-Fun 1.3B InP | I2V | `examples/training/finetune/Wan2.1-Fun-1.3B-InP/crush_smol/` |
 | Wan2.1 VSA | T2V/I2V | `examples/training/finetune/Wan2.1-VSA/Wan-Syn-Data/` |
+| Wan2.1 T2V 1.3B Attn-QAT | QAT SFT + DMD2 | `examples/train/scenario/qad_wan2_1_mixkit/` |
 
 Each example includes:
 
-- `download_dataset.sh` — download sample data
+- a README pointing at the matching download script under `examples/datasets/`
 - `preprocess_*.sh` — run preprocessing
 - `finetune_*.sh` — full finetune launcher
 - `finetune_*_lora.sh` — LoRA finetune launcher

docs/training/overview.md

@@ -43,9 +43,12 @@ Ready-to-run examples with preprocessing scripts, training launchers, and valida
 
 **→ [Browse all training examples](examples/examples_training_index.md)**
 
+For the complete two-stage Wan2.1 MixKit quantization-aware workflow, see
+**[Attn-QAT Training](attn_qat.md)**.
+
 Each example includes:
 
-- `download_dataset.sh` — download sample data
+- a README pointing at the matching download script under `examples/datasets/`
 - `preprocess_*.sh` — run preprocessing
 - `finetune_*.sh` — launch training (full finetune or LoRA)
 - `validation.json` — validation prompts for checkpoints
@@ -59,9 +62,11 @@ FastVideo supports several training approaches:
 | **Full finetune** | Adapt entire model to a new domain or style |
 | **LoRA finetune** | Lightweight adaptation with frozen base weights |
 | **VSA finetune** | Finetune with Variable Sparse Attention for efficiency |
+| **Attn-QAT** | Train with fake-quantized attention, optionally followed by DMD2 distillation |
 
 ## Next Steps
 
 1. **Get started**: Pick an example from the [training examples index](examples/examples_training_index.md)
 2. **Prepare data**: Follow [data preprocessing](data_preprocess.md) for your own dataset
-3. **Run inference**: After training, see [inference examples](../inference/examples/examples_inference_index.md)
+3. **Train with quantized attention**: Follow the [Attn-QAT two-stage recipe](attn_qat.md)
+4. **Run inference**: After training, see [inference examples](../inference/examples/examples_inference_index.md)

docs/training/train_infra.md

@@ -81,6 +81,7 @@ Common model parameters:
 | `disable_custom_init_weights` | `false` | Skip custom weight initialization (use for teacher/critic) |
 | `flow_shift` | `3.0` | Timestep shifting factor |
 | `enable_gradient_checkpointing_type` | `null` | Gradient checkpointing (`"full"` or `null`) |
+| `attention_backend` | `null` | Optional role-local backend for Wan models (for example `ATTN_QAT_TRAIN`); overrides the process default only while this role's transformer is built |
 
 Which roles are needed depends on the training method:
 
@@ -211,6 +212,29 @@ pipeline:
   flow_shift: 8
 ```
 
+Registered transformer linear-quantization configs can also be selected by
+name. For example, the LTX-2 NVFP4-QAT recipe applies real FP4 forward GEMMs
+with a straight-through-estimator backward to its deployment-targeted
+attention/FFN projections:
+
+```yaml
+pipeline:
+  dit_config:
+    quant_config: nvfp4_qat_train
+```
+
+The LTX-2 recipe in
+`examples/train/configs/overfit_ltx2_t2v_nvfp4_qat.yaml` combines that linear
+configuration with `models.student.attention_backend: ATTN_QAT_TRAIN` for
+video-attention forward/backward. On sm120, its validation callback temporarily
+switches those layers to `ATTN_QAT_INFER`.
+On GB200, set `callbacks.validation.attn_qat_infer: false` to keep validation on
+the train-time QAT backend; the inference kernel is sm120-only.
+
+User-adaptable LTX-2 fine-tuning recipes (full, LoRA, and NVFP4 QAT) live in
+`examples/train/configs/fine_tuning/ltx2/`, alongside the other model
+families under `examples/train/configs/fine_tuning/`.
+
 ---
 
 ## Training Methods
@@ -298,6 +322,8 @@ method:
 | `dmd_denoising_steps` | *(required)* | Timestep schedule for student rollout |
 | `generator_update_interval` | `1` | Update student every N critic steps |
 | `real_score_guidance_scale` | `1.0` | CFG scale for teacher predictions |
+| `min_timestep_ratio` | `0.0` | Lower bound for randomly sampled teacher/critic score timesteps |
+| `max_timestep_ratio` | `1.0` | Upper bound for randomly sampled teacher/critic score timesteps |
 | `fake_score_learning_rate` | *(required)* | Critic optimizer learning rate |
 | `fake_score_betas` | *(required)* | Critic optimizer Adam betas |
 | `fake_score_lr_scheduler` | *(required)* | Critic LR scheduler type |

docs/utilities/debugging.md

@@ -77,8 +77,13 @@ If forcing a backend fails, verify optional dependencies are installed:
 - `SAGE_ATTN`: SageAttention package
 - `SAGE_ATTN_THREE`: upstream `sageattn3` package
 - `ATTN_QAT_INFER`: `fastvideo-kernel` checkout/source install that exposes
-  `attn_qat_infer`
-- `ATTN_QAT_TRAIN`: `fastvideo-kernel` install exposing `fastvideo_kernel`
+  `attn_qat_infer`, AND a consumer-Blackwell (sm_120/sm_121) GPU -- on any
+  other device the backend reports unavailable (even if a CUDA 13 wheel
+  bundles the extension) and selection falls back to FlashAttention
+- `ATTN_QAT_TRAIN`: `fastvideo-kernel`; its runtime-JIT Triton implementation
+  selects an optimized route on SM100, joins the quantized and STE P@V paths on
+  SM120, and retains the previous route for unsupported configurations. See
+  [Attn-QAT Training](../training/attn_qat.md) for architecture controls.
 
 As a fallback, use: