diff --git a/.env.example b/.env.example
index e28928a..6a801bf 100644
--- a/.env.example
+++ b/.env.example
@@ -106,17 +106,3 @@ KOLOOK_AUTOMATIONS_WORK_DIR=
 # KOLOOK_COMFYUI_DEV_PATH (assumes <comfyui-root>/user/comfyui.log). Set this
 # only if your install writes logs elsewhere.
 KOLOOK_COMFYUI_LOG=
-
-# --- Investigation patch sync targets ---------------------------------------
-# Per-investigation absolute path to a third-party node's live install dir.
-# Used by scripts/sync_investigation_patches.py to push patched files from
-# docs/investigations/<NN>_<topic>/patches/ into the running ComfyUI.
-# Each upstream gets its own env var, declared in the investigation's
-# upstream.yaml under sync_target_env.
-
-# WhatDreamsCost-ComfyUI install path. Required for investigation 01
-# (LTX23-audio-file-lipsync). Forward slashes OK on Windows.
-#
-# Example:
-#   Windows: E:/_AI/portable/ComfyUI_windows_312/ComfyUI/custom_nodes/WhatDreamsCost-ComfyUI
-KOLOOK_WHATDREAMSCOST_PATH=
diff --git a/CHANGELOG.md b/CHANGELOG.md
index af31d72..6a938c2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,46 @@ The format is inspired by Keep a Changelog and SemVer.
 
 ## [Unreleased]
 
+### Changed
+- **Automations restructured around modules instead of models.**
+  `docs/automations/` now pivots on one folder per *task* (each its own
+  workflow + iteration loop + findings) rather than one folder per model.
+  The existing `LTX-2.3/{README,findings,handoff-checklist}.md` content
+  moved into `LTX-2.3/base-1step/` (single-stage render task) and the new
+  sibling `LTX-2.3/audio-lipsync/` (audio-file lip-sync task) was created.
+  `docs/automations/{README,CHEATSHEET}.md` updated to reflect the new
+  layout; `docs/automations/CONVENTIONS.md` unchanged.
+- **`docs/investigations/` removed.** Its two children migrated to their
+  natural homes: narrative content into the new automation modules under
+  `docs/automations/LTX-2.3/{base-1step,audio-lipsync}/`; the modified
+  upstream Python code into the new `forks/whatdreamscost_koolook/`
+  fork (see *Added*). The retired `scripts/sync_investigation_patches.py`
+  and its `KOLOOK_WHATDREAMSCOST_PATH` env-var section in `.env.example`
+  go with it — iteration now uses the standard `dev-sync` flow against
+  the in-repo fork.
+- **Glossary updated.** The *Investigation folder*, *Investigation patches*,
+  *JSON file folder*, and `sync_investigation_patches.py` entries in
+  [`docs/reference/glossary.md`](docs/reference/glossary.md) are replaced
+  by *Automation module*, *Backstory*, *Working folder*, and *Card*; the
+  *Loop* and *Run* entries are rewritten to point at the new structure.
+
+### Added
+- **`forks/whatdreamscost_koolook/v1_3_2/` — Koolook fork of WhatDreamsCost-ComfyUI's
+  `LTXDirector`** (upstream `e81223a`, GPL-3.0). Two upstream files modified
+  (`ltx_director.py` adds a `relay_overrides` multiline-JSON widget;
+  `prompt_relay.py` uses the Prompt-Relay paper's per-segment σ formula
+  instead of upstream's length-independent constant) plus the
+  unmodified `patches.py` vendored verbatim because the modified file
+  imports from it. Registered as
+  `LTXDirector__koolook_v1_3_2` (display name *"LTX Director (Koolook
+  v1.3.2)"*) so it coexists with an installed copy of upstream
+  WhatDreamsCost-ComfyUI in the node picker. Drives the
+  [`docs/automations/LTX-2.3/audio-lipsync/`](docs/automations/LTX-2.3/audio-lipsync/)
+  iteration loop. License attribution + change log in
+  [`forks/THIRD_PARTY.md`](forks/THIRD_PARTY.md); pin metadata in
+  [`forks/whatdreamscost_koolook/versions/v1_3_2/UPSTREAM_PIN.yaml`](forks/whatdreamscost_koolook/versions/v1_3_2/UPSTREAM_PIN.yaml)
+  and [`forks/forks_manifest.yaml`](forks/forks_manifest.yaml).
+
 ## [0.3.7] - 2026-05-23
 
 ### Added
diff --git a/__init__.py b/__init__.py
index e07bd78..bc6e85b 100644
--- a/__init__.py
+++ b/__init__.py
@@ -25,6 +25,9 @@ try:
 
     from .forks.radiance_koolook import NODE_CLASS_MAPPINGS as radiance_koolook_mappings
     from .forks.radiance_koolook import NODE_DISPLAY_NAME_MAPPINGS as radiance_koolook_display
+
+    from .forks.whatdreamscost_koolook import NODE_CLASS_MAPPINGS as whatdreamscost_koolook_mappings
+    from .forks.whatdreamscost_koolook import NODE_DISPLAY_NAME_MAPPINGS as whatdreamscost_koolook_display
 except ImportError as _node_import_exc:
     # The relative imports above require a parent-package context that
     # only ComfyUI's custom-node loader provides. Pytest's package
@@ -68,6 +71,7 @@ else:
         **pattern_mappings,
         **video_combine_mappings,
         **radiance_koolook_mappings,
+        **whatdreamscost_koolook_mappings,
     }
 
     NODE_DISPLAY_NAME_MAPPINGS = {
@@ -79,6 +83,7 @@ else:
         **pattern_display,
         **video_combine_display,
         **radiance_koolook_display,
+        **whatdreamscost_koolook_display,
     }
 
 WEB_DIRECTORY = "./web"
diff --git a/docs/automations/CHEATSHEET.md b/docs/automations/CHEATSHEET.md
index 1bc35c7..985c731 100644
--- a/docs/automations/CHEATSHEET.md
+++ b/docs/automations/CHEATSHEET.md
@@ -1,12 +1,12 @@
 # Cheat sheet
 
-For someone who already knows the loop. Full docs: [`README.md`](README.md), [`CONVENTIONS.md`](CONVENTIONS.md), [`LTX-2.3/README.md`](LTX-2.3/README.md).
+For someone who already knows the loop. Full docs: [`README.md`](README.md), [`CONVENTIONS.md`](CONVENTIONS.md), and the per-module READMEs (e.g. [`LTX-2.3/base-1step/README.md`](LTX-2.3/base-1step/README.md), [`LTX-2.3/audio-lipsync/README.md`](LTX-2.3/audio-lipsync/README.md)).
 
 ---
 
 ## Bootstrap
 
-Bare-bones — what's needed to get the loop running on a fresh machine. Model-specific setup (checkpoints, LoRAs, custom nodes for a particular model) lives in each model's handoff checklist, e.g. [`LTX-2.3/handoff-checklist.md`](LTX-2.3/handoff-checklist.md).
+Bare-bones — what's needed to get the loop running on a fresh machine. Module-specific setup (checkpoints, LoRAs, custom nodes for a particular task, optional fork code) lives in each module's handoff checklist, e.g. [`LTX-2.3/base-1step/handoff-checklist.md`](LTX-2.3/base-1step/handoff-checklist.md).
 
 **Repo side**
 - [ ] Python 3.11+ with `pip install Pillow`. On Windows, the absolute path `C:/Python313/python.exe` sidesteps the Microsoft Store stub.
@@ -85,10 +85,16 @@ ComfyUI-Koolook/
     ├── README.md                       overview + start-here
     ├── CHEATSHEET.md                   this file
     ├── CONVENTIONS.md                  full contract
-    └── LTX-2.3/                        one folder per model
-        ├── README.md
-        ├── handoff-checklist.md
-        └── findings.md
+    └── LTX-2.3/                        model grouping (no shared docs of its own)
+        ├── base-1step/                  ← one automation module
+        │   ├── README.md
+        │   ├── handoff-checklist.md
+        │   └── findings.md
+        └── audio-lipsync/               ← another module on the same model
+            ├── README.md
+            ├── handoff-checklist.md
+            ├── findings.md
+            └── runs/                    in-repo run snapshots for fork-touching iterations
 ```
 
 ### Working-folder-side (per project — pointed at by `KOLOOK_AUTOMATIONS_WORK_DIR`)
@@ -113,7 +119,7 @@ Wipe `_AI/` to reset the agent's tracking history without touching renders. Wipe
 - **`loop` in the filename = post-card output, skipped.** When ComfyUI saves the composited-with-card video back into the working folder, name it `<base>_loop_<seq>.mp4` (and pair JSON). Auto-discovery ignores anything with `loop` in the stem, so the script never feeds its own output back as input.
 - **Card filename is stable.** Wire your NLE to `_AI/card.png` once.
 - **Seed = 12 (fixed)** while sweeping any other knob. Vary seed only after a setting stabilises.
-- **Scheduler = `linear_quadratic` (8 steps)** — locked-in finding. See [`LTX-2.3/findings.md`](LTX-2.3/findings.md).
+- **Scheduler = `linear_quadratic` (8 steps)** — locked-in finding. See [`LTX-2.3/base-1step/findings.md`](LTX-2.3/base-1step/findings.md).
 - **Promote** a hypothesis to a finding when it's stable across ≥ 3 runs in `_AI/iterations.md`.
 - **Run label** on the card: prefers `v01`-style; falls back to `_00001` sequence numbers; else `?`.
 - **Switching projects:** update `Working_Folder_PATH` node + `.env`. Node wins on mismatch.
diff --git a/docs/automations/LTX-2.3/audio-lipsync/README.md b/docs/automations/LTX-2.3/audio-lipsync/README.md
new file mode 100644
index 0000000..6da934e
--- /dev/null
+++ b/docs/automations/LTX-2.3/audio-lipsync/README.md
@@ -0,0 +1,123 @@
+# LTX 2.3 audio-file lip-sync — iteration loop
+
+AI-assisted iteration loop for getting audio-file-driven lip-sync working
+on the WhatDreamsCost `LTXDirector` (LTX 2.3). The vanilla `use_custom_audio = True`
+path produces broken video — no lip-sync, no meaningful animation, prompt
+adherence collapses. This automation iterates on a Koolook-modified
+`LTXDirector` that adds a `relay_overrides` widget and a per-segment-σ
+formula in `build_segments`; the loop sweeps those knobs to find a setting
+that preserves video coherence with the external audio.
+
+**Tracking issue:** [#177](https://github.com/malkuthro/ComfyUI-Koolook/issues/177)
+**Sibling automation:** [`../base-1step/`](../base-1step/) — same model, the single-stage path with model-generated audio. Locked-in LTX-2.3 architecture facts live in its [`findings.md`](../base-1step/findings.md).
+**Backstory:** [`backstory/audio-lipsync-rationale.md`](backstory/audio-lipsync-rationale.md) — why the audio path fails by default, the Prompt-Relay paper, what the two patches are doing mechanically.
+**Started:** 2026-05-28
+
+## What the Koolook fork ships
+
+Lives at [`../../../../forks/whatdreamscost_koolook/versions/v1_3_2/`](../../../../forks/whatdreamscost_koolook/versions/v1_3_2/),
+loaded by ComfyUI as `LTX Director (Koolook v1.3.2)` in the picker. Two upstream
+modifications:
+
+### Modification 1 — per-segment σ in `prompt_relay.py`
+
+`build_segments` now computes σ per-segment using the Prompt-Relay paper
+formula:
+
+```
+σ = (L − w_eff) / (2 · √ln(1/ε))
+```
+
+Upstream used a length-independent `σ = 1/ln(1/ε)` (≈ 0.1448 at ε=0.001) —
+a razor-sharp boundary that did not scale with segment length L. The new
+formula calibrates the penalty so it hits threshold ε exactly at the
+segment boundary regardless of L. A `SIGMA_FALLBACK = 0.1448` preserves
+the prior constant for the degenerate `L ≤ w_eff` corner. Per-segment σ
+is logged as `[PromptRelay] seg L=… w_v=… sigma_v=…`.
+
+### Modification 2 — `relay_overrides` widget on `LTXDirector`
+
+A new optional multiline-string input on the LTXDirector canvas widget.
+The maintainer pastes a JSON dict of Prompt-Relay knobs directly into the
+node — values live entirely inside the workflow JSON, no disk file, no
+env var.
+
+Supported keys (all optional):
+
+| Key | Type | Default | Effect |
+|---|---|---|---|
+| `video_strength` | float | 1.0 | Multiplies `attn2` penalty (video × text). Raise to tighten per-segment text routing. |
+| `video_window_scale` | float | 1.0 | Scales the flat-top window width on the video side. < 1.0 = penalty kicks in closer to segment center. |
+| `audio_strength` | float | 1.0 | Same for `audio_attn2`. **Note:** no-op for video output when `use_custom_audio=true` (audio latent is frozen at `noise_mask=0`). |
+| `audio_window_scale` | float | 1.0 | Audio-side window. |
+| `audio_epsilon` | float | inherit | Independent σ for the audio path. |
+
+Underscore-prefixed keys are ignored (use for inline JSON comments). Example value to paste:
+
+```json
+{"video_strength": 10.0}
+```
+
+Empty field → upstream Prompt-Relay defaults (Modification 1 still active —
+the new σ formula is unconditional).
+
+## Folder map
+
+```
+audio-lipsync/
+├── README.md           ← this file
+├── handoff-checklist.md ← bootstrap for picking up this automation cold
+├── findings.md          ← locked-in (currently empty; populated as runs validate)
+├── backstory/
+│   └── audio-lipsync-rationale.md
+└── runs/               ← per-render snapshots
+    ├── LOOP.md         ← the iteration protocol
+    ├── log.md          ← rolling table of runs
+    └── run-NNN_<label>/
+        ├── workflow.json
+        ├── relay_overrides.txt
+        ├── patch_state.txt
+        └── notes.md
+```
+
+## Iteration loop
+
+1. **Edit a knob.** Either:
+   - **Widget-only swap** — change `relay_overrides` JSON on the LTXDirector node in ComfyUI. No restart needed; just queue.
+   - **Code-level change** — edit
+     [`../../../../forks/whatdreamscost_koolook/versions/v1_3_2/prompt_relay.py`](../../../../forks/whatdreamscost_koolook/versions/v1_3_2/prompt_relay.py)
+     or [`ltx_director.py`](../../../../forks/whatdreamscost_koolook/versions/v1_3_2/ltx_director.py)
+     in this repo. Then sync into the maintainer's live ComfyUI via the standard `dev-sync` (user-initiated; see project `CLAUDE.md`). Restart Comfy for Python module reload.
+2. **Save workflow** — `Workflow → Save (API Format)` into the working folder.
+3. **Render** — queue.
+4. **Report** in chat — verbal feedback on sync state, motion, prompt adherence.
+5. **Agent snapshots** the run into `runs/run-NNN_<label>/` and appends a row to [`runs/log.md`](runs/log.md).
+
+See [`runs/LOOP.md`](runs/LOOP.md) for the full per-render protocol.
+
+## Workflow JSON — Koolook node ID
+
+The test workflow uses `LTXDirector__koolook_v1_3_2` (display name *"LTX
+Director (Koolook v1.3.2)"*), not the upstream `LTXDirector`. Both appear
+in ComfyUI's node picker side-by-side — upstream stays vanilla, the Koolook
+variant carries our two modifications.
+
+If you're starting from an existing workflow that wires the upstream
+`LTXDirector`:
+
+1. Open the workflow in ComfyUI.
+2. Right-click the `LTX Director` node → **Convert / Replace** with `LTX Director (Koolook v1.3.2)`. Same input/output socket layout — wires are preserved.
+3. The new `relay_overrides` widget appears at the bottom of the node — paste your JSON there (empty field is fine).
+4. `Workflow → Save (API Format)` into the working folder.
+
+Reverting to upstream behaviour for an A/B comparison: drop in the upstream
+`LTXDirector` node next to the Koolook one and toggle which feeds the
+downstream `LTXDirectorGuide`. No file backups needed — the upstream
+install is untouched.
+
+## Reverting changes to the fork
+
+Edits to `forks/whatdreamscost_koolook/versions/v1_3_2/*.py` are normal
+git-tracked changes — `git restore` / `git stash` work as usual. Once
+`dev-sync` is run, the running ComfyUI install is updated; restart Comfy
+so the Python module reimports.
diff --git a/docs/automations/LTX-2.3/audio-lipsync/backstory/audio-lipsync-rationale.md b/docs/automations/LTX-2.3/audio-lipsync/backstory/audio-lipsync-rationale.md
new file mode 100644
index 0000000..e2cc0d5
--- /dev/null
+++ b/docs/automations/LTX-2.3/audio-lipsync/backstory/audio-lipsync-rationale.md
@@ -0,0 +1,96 @@
+# Why we forked LTXDirector for audio-file lip-sync
+
+Backstory for the [LTX 2.3 audio-lipsync automation](../README.md): the
+symptom, the mechanism, and what the two fork modifications are doing.
+The running iteration narrative lives in
+[`../runs/log.md`](../runs/log.md); locked findings in
+[`../findings.md`](../findings.md).
+
+## The symptom
+
+When `use_custom_audio: true` and an external audio file is provided to
+upstream `LTXDirector`, the resulting video is broken: no lip-sync,
+no meaningful animation, prompt adherence collapses. The only mode that
+produces good output is `use_custom_audio: false` with `[Audio]: …` in
+the prompt (model-generated audio).
+
+We want audio-file mode to work — the model-generated path can't be
+art-directed against an existing soundtrack.
+
+## Why upstream fails
+
+Two mechanisms compounded:
+
+### 1. Length-independent σ in `build_segments`
+
+Upstream `prompt_relay.py` computes the segment cost penalty with:
+
+```python
+sigma = 1.0 / math.log(1.0 / epsilon) if 0 < epsilon < 1 else 0.1448
+```
+
+A constant ≈ 0.1448 at the paper-default ε=0.001. The Prompt-Relay paper
+(*"Prompt Relay: Inference-Time Temporal Control for Multi-Event Video
+Generation"*, [arXiv:2604.10030](https://arxiv.org/abs/2604.10030))
+defines:
+
+```
+σ = (L − w) / (2 · √ln(1/ε))
+```
+
+— scaling σ with segment length L so the penalty hits threshold ε
+exactly at the segment boundary. Upstream's constant-σ approximation
+holds when all segments are roughly the same length, but breaks down when
+segment lengths vary widely (which is what happens when audio drives the
+segment boundaries — speech segments are not uniform).
+
+### 2. No knob for per-render Prompt-Relay tuning
+
+The Prompt-Relay penalty has knobs (`video_strength`, `video_window_scale`,
+`audio_strength`, `audio_window_scale`, `audio_epsilon`) that the paper
+varies depending on the data. Upstream hardcodes them, so the only way to
+tune was edit-and-restart of `prompt_relay.py`. For an iteration loop
+sweeping these knobs across runs, that's heavyweight.
+
+## What the fork does
+
+Two upstream files modified, one vendored verbatim:
+
+| File | Change | Why |
+|---|---|---|
+| `prompt_relay.py` | Per-segment σ per the paper formula, with `SIGMA_FALLBACK = 0.1448` for the `L ≤ w_eff` degenerate corner. | Tracks the paper precisely — same behaviour as upstream when L is uniform; differs when L varies. |
+| `ltx_director.py` | Adds a `relay_overrides` multiline JSON input on the LTXDirector node. Underscore-prefixed keys ignored (inline JSON comments). | Per-render knob sweeps without editing the fork file. Workflow JSON carries the override; reproducible across machines. |
+| `patches.py` | **Unmodified**. Vendored verbatim because `ltx_director.py` imports `detect_model_type, apply_patches` from it. | Self-contained fork; no runtime dependency on the user's upstream WhatDreamsCost install for these two functions. |
+
+The fork is loaded as `LTXDirector__koolook_v1_3_2` (display name
+*"LTX Director (Koolook v1.3.2)"*). Upstream `LTXDirector` continues to
+exist in the node picker for A/B comparison.
+
+## Hypothesis space being swept
+
+What's not yet validated and is what the iteration loop is for:
+
+1. **Whether the paper σ formula alone fixes the symptom.** Empty
+   `relay_overrides` → fork's σ change is active, all other knobs at
+   upstream defaults. If sync recovers, σ was the dominant cause.
+2. **Whether `video_strength` > 1 helps.** Tightening per-segment text
+   routing should reduce the model's freedom to ignore the prompt under
+   audio pressure. Sweep `1, 2.5, 10`.
+3. **Whether window scaling helps.** Narrowing the flat-top makes the
+   penalty kick in closer to segment center, biasing the model to commit
+   to one prompt segment at a time. Sweep `video_window_scale` `0.7 / 1.0`.
+4. **Whether audio-side knobs matter at all when `use_custom_audio=true`.**
+   The audio latent is frozen at `noise_mask=0` in that mode, so
+   `audio_attn2`'s penalty has no effect on the video output. Predict
+   `audio_strength` is a no-op; confirm empirically.
+
+Each of these turns into one or more rows in
+[`../runs/log.md`](../runs/log.md). Once a pattern shows up across
+≥ 3 confirming runs, it graduates to [`../findings.md`](../findings.md).
+
+## Related
+
+- [Prompt-Relay paper](https://arxiv.org/abs/2604.10030) — Chen, Huang, Liu (S-Lab, NTU, April 2026).
+- [Reference implementation by paper authors](https://github.com/GordonChen19/Prompt-Relay).
+- [Kijai's ComfyUI port](https://github.com/kijai/ComfyUI-PromptRelay) — the basis of WhatDreamsCost's LTXDirector.
+- Sibling automation: [`../../base-1step/`](../../base-1step/) — same model, the model-generated-audio path. Locked-in LTX-2.3 architecture facts (spatial upscaler ×2 hardcoding, attention scaling) live in its [`findings.md`](../../base-1step/findings.md) and apply here too.
diff --git a/docs/automations/LTX-2.3/audio-lipsync/findings.md b/docs/automations/LTX-2.3/audio-lipsync/findings.md
new file mode 100644
index 0000000..2cf9d45
--- /dev/null
+++ b/docs/automations/LTX-2.3/audio-lipsync/findings.md
@@ -0,0 +1,26 @@
+# LTX 2.3 audio-lipsync — promoted findings
+
+Settled conclusions from the iteration loop. Entries graduate here from the
+running [`runs/log.md`](runs/log.md) when a pattern shows up across multiple
+renders.
+
+This file is scoped to the **audio-file lip-sync** automation. Model-level
+LTX-2.3 architecture facts (spatial upscaler ×2 hardcoding, brief path,
+attention quadratic in token count) live in the sibling
+[`../base-1step/findings.md`](../base-1step/findings.md) and apply here too.
+
+Anything in this file is **locked in** — don't sweep it again without a reason.
+
+---
+
+*No findings yet. First entry appears once a knob's effect is stable across
+≥ 3 confirming runs.*
+
+---
+
+## How to add a new finding
+
+1. Pattern is stable across ≥ 3 runs in [`runs/log.md`](runs/log.md).
+2. You can describe it as a single declarative sentence ("X causes Y" or "do X, don't do Y").
+3. Move it here under an appropriate heading, with a one-paragraph "why" and links to the run(s) that confirmed it.
+4. Remove the corresponding hypothesis from the open list in [`README.md`](README.md) (and from [`backstory/audio-lipsync-rationale.md`](backstory/audio-lipsync-rationale.md) if it was raised there) so those files shrink toward truth.
diff --git a/docs/automations/LTX-2.3/audio-lipsync/handoff-checklist.md b/docs/automations/LTX-2.3/audio-lipsync/handoff-checklist.md
new file mode 100644
index 0000000..8a40d84
--- /dev/null
+++ b/docs/automations/LTX-2.3/audio-lipsync/handoff-checklist.md
@@ -0,0 +1,70 @@
+# Handoff checklist — LTX 2.3 audio-lipsync automation
+
+Use this when picking up this automation on a different machine, or handing
+over to someone else. Target time-to-first-render: ~5 minutes after the
+sibling [`../base-1step/handoff-checklist.md`](../base-1step/handoff-checklist.md)
+prerequisites are met.
+
+The base-1step handoff covers shared prerequisites (Python + Pillow + the
+working folder + Text Multiline nodes + most custom-node packs). Do that
+first, then come back here.
+
+## 1. Extra ComfyUI deps
+
+This automation drives a modified `LTXDirector`, so beyond the base-1step
+custom-node list you also need:
+
+- [ ] **`WhatDreamsCost-ComfyUI` installed.** The Koolook fork only ports
+  `LTXDirector`; the companion `LTXDirectorGuide`, `LTXKeyframer`,
+  `MultiImageLoader`, `LTXSequencer`, `SpeechLengthCalculator`,
+  `LoadAudioUI`, `LoadVideoUI` come from upstream. Install via
+  ComfyUI-Manager or `git clone https://github.com/WhatDreamsCost/WhatDreamsCost-ComfyUI` into `custom_nodes/`.
+- [ ] **The Koolook fork is loaded automatically.** No extra step — it ships
+  inside this repo at
+  [`../../../../forks/whatdreamscost_koolook/`](../../../../forks/whatdreamscost_koolook/)
+  and is wired into [`../../../../__init__.py`](../../../../__init__.py). On
+  ComfyUI startup you should see both `LTX Director` (upstream) and
+  `LTX Director (Koolook v1.3.2)` in the node picker.
+
+## 2. Workflow file
+
+- [ ] Save the audio-lipsync workflow as
+  `<workflow root>/LTX-23-audio_tests_v01.json` (or whatever filename your
+  working folder uses). The Director node must be
+  **`LTX Director (Koolook v1.3.2)`** (registered ID
+  `LTXDirector__koolook_v1_3_2`), not the upstream `LTX Director`.
+- [ ] On the Koolook Director, the `relay_overrides` widget sits at the
+  bottom of the node. Start with an empty string for a regression check
+  against upstream-default behaviour, then iterate.
+
+## 3. First render
+
+- [ ] Queue once. Confirm in chat with the maintainer what the audio /
+  sync / motion looked like.
+- [ ] Agent will capture the snapshot into `runs/run-001_<label>/` and
+  append a row to [`runs/log.md`](runs/log.md).
+
+If the Director node still shows the upstream `LTXDirector` after loading
+the workflow:
+
+- Check the ComfyUI startup log for a `[Koolook] node registry skipped` or
+  `from .forks.whatdreamscost_koolook import …` ImportError — that means
+  the fork didn't load (transitive import failure). Run pytest at the repo
+  root to see the failure outside ComfyUI.
+- Verify `pip show -f WhatDreamsCost-ComfyUI` or equivalent — the Koolook
+  fork imports through `comfy_api`, which only exists in a real ComfyUI
+  process.
+
+## 4. Iteration
+
+See [`README.md`](README.md) (this folder) for the iteration loop and
+[`runs/LOOP.md`](runs/LOOP.md) for the per-render protocol.
+
+## Off-boarding
+
+- Commit + push `findings.md` updates and any fork-code edits you made
+  this session.
+- The per-project working folder (workflow JSON + MP4 + `_AI/`) stays
+  where it is, outside the repo. Make sure
+  `KOLOOK_AUTOMATIONS_WORK_DIR` in `.env` points at it so the next
+  machine picks up the same iterations log.
diff --git a/docs/automations/LTX-2.3/audio-lipsync/runs/LOOP.md b/docs/automations/LTX-2.3/audio-lipsync/runs/LOOP.md
new file mode 100644
index 0000000..c98f4ca
--- /dev/null
+++ b/docs/automations/LTX-2.3/audio-lipsync/runs/LOOP.md
@@ -0,0 +1,68 @@
+# LTX 2.3 audio-lipsync — per-render iteration protocol
+
+**Automation:** [LTX 2.3 audio-lipsync](../README.md)
+**Tracking issue:** [malkuthro/ComfyUI-Koolook#177](https://github.com/malkuthro/ComfyUI-Koolook/issues/177)
+**Started:** 2026-05-28
+
+---
+
+## The loop
+
+| Step | Who | What |
+|---|---|---|
+| 1 | Maintainer | Either edit `relay_overrides` JSON on the **`LTX Director (Koolook v1.3.2)`** node in ComfyUI, OR edit a `forks/whatdreamscost_koolook/versions/v1_3_2/*.py` source in this repo + run `dev-sync` + restart Comfy. |
+| 2 | Maintainer | **Save** workflow → overwrites the current workflow file at the working folder. |
+| 3 | Maintainer | Queue render in ComfyUI. |
+| 4 | Maintainer | Report result in chat (verbal feedback — sync state, motion state, prompt adherence). |
+| 5 | Agent | Snapshot current state into a new `run-NNN_<label>/` folder here + append a row to [`log.md`](log.md). |
+| 6 | Agent | Confirm what was captured. |
+
+**Save-before-render** is the anchor: the workflow file on disk at submission time = exactly what produced the render being described. No copy-paste, no version drift.
+
+## Per-run snapshot contents
+
+```
+run-NNN_<label>/
+├── workflow.json           ← copy of the working-folder workflow at submission
+├── relay_overrides.txt     ← the LTX Director (Koolook) node's relay_overrides widget value
+├── patch_state.txt         ← MAIN SHA + dev-sync SHA + whether forks/.../v1_3_2/*.py differs from MAIN
+└── notes.md                ← maintainer's verbal feedback + agent's one-line interp
+```
+
+The `relay_overrides` value is also stored inside `workflow.json` (Koolook
+LTXDirector node widget), but the `.txt` copy makes it diff-friendly in the
+run folder.
+
+## Trigger detection
+
+No magic phrase. Whenever the maintainer describes a render result in chat, the agent treats it as a feedback signal and creates a new run folder. The agent confirms in chat what was captured; the maintainer can rename, delete, or correct.
+
+To share a workflow file *without* logging it as a run, say "no log" or "don't log this" in the chat message.
+
+## Run labels
+
+Auto-generated from key knob state + feedback summary, e.g.:
+
+- `run-001_no-override_baseline-fork-only`
+- `run-002_vstr10_no-change`
+- `run-003_vstr25_some-motion-recovered`
+- `run-004_vstr10_astr0.5_sync-partial`
+- `run-005_codechange_sigma-bumped_sync-clean`
+
+The maintainer can override any label by stating it explicitly.
+
+## Syncing fork-code edits to the live install
+
+When the iteration step requires editing a `forks/whatdreamscost_koolook/`
+source (not just the widget), the standard
+[`dev-sync`](../../../../scripts/sync_to_dev.py) flow applies — it's a
+user-initiated, never-automatic action per the project `CLAUDE.md`. Quick
+recipe:
+
+```
+python scripts/sync_to_dev.py --scope "audio-lipsync fork edit"
+```
+
+Then restart Comfy so the Python module re-imports. Widget-only changes
+(editing `relay_overrides` JSON on the canvas) do **not** require sync or
+restart — just queue the next render.
diff --git a/docs/investigations/01_LTX23-audio-file-lipsync/runs/log.md b/docs/automations/LTX-2.3/audio-lipsync/runs/log.md
similarity index 100%
rename from docs/investigations/01_LTX23-audio-file-lipsync/runs/log.md
rename to docs/automations/LTX-2.3/audio-lipsync/runs/log.md
diff --git a/docs/automations/LTX-2.3/README.md b/docs/automations/LTX-2.3/base-1step/README.md
similarity index 65%
rename from docs/automations/LTX-2.3/README.md
rename to docs/automations/LTX-2.3/base-1step/README.md
index ff88d26..7bf8296 100644
--- a/docs/automations/LTX-2.3/README.md
+++ b/docs/automations/LTX-2.3/base-1step/README.md
@@ -1,16 +1,25 @@
-# LTX 2.3 — evaluation loop
+# LTX 2.3 base — single-stage iteration loop
 
-AI-assisted iteration loop for evaluating **Lightricks LTX 2.3** video generation behaviour. Currently focused on the WhatDreamsCost `LTXDirector` node — multi-segment prompts, keyframe transitions, audio sync, and high-resolution behaviour.
+AI-assisted iteration loop for the **single-stage LTX 2.3** rendering path: brief
+the WhatDreamsCost `LTXDirector` once, sample 8 steps at the chosen resolution,
+no Phase-2 upscale. Each render produces a side-by-side card; the maintainer
+scores it; locked-in conclusions graduate to [`findings.md`](findings.md). The
+sibling [`../audio-lipsync/`](../audio-lipsync/) automation iterates on the
+same model with audio-file lip-sync instead.
 
-The shared loop pattern + node contract is in [`../CONVENTIONS.md`](../CONVENTIONS.md). Anything LTX-specific is here.
+The shared loop pattern + Text-Multiline node contract is in
+[`../../CONVENTIONS.md`](../../CONVENTIONS.md); anything specific to *this*
+automation lives here.
 
 ## What this loop is for
 
-- Sweep one knob at a time (Phase 2 denoise, scheduler shape, resolution selector, etc.), render at the chosen seed, capture a tracking card next to the video.
+- Sweep one knob at a time (resolution selector, scheduler shape, denoise, etc.) at a fixed seed; capture a tracking card next to the video.
 - Build a body of evidence over multiple runs about *what each knob actually does at this model's training boundaries*.
 - Promote stable findings to [`findings.md`](findings.md) so they don't get re-discovered.
 
-The original investigation that produced this loop: [`../../investigations/ltx-director-4k-transitions.md`](../../investigations/ltx-director-4k-transitions.md).
+How this automation got here — what the LTX Director actually does, the 4K
+dissolve / 2K morph experiments, scheduler-shape lock-in — is captured in the
+backstory: [`backstory/4k-transitions.md`](backstory/4k-transitions.md).
 
 ## The loop (per iteration)
 
@@ -50,23 +59,26 @@ Free-text fields (filled by you in the workflow):
 | Feedback | `OVERLAY - FEEDBACK` (non-score lines) | Post-render observations. |
 | Outcome scores | `OVERLAY - FEEDBACK` (lines like `motion: 4/5`) | Each axis 0–5; missing axes show as `?/5`. |
 
-## Active investigation
+## Open questions (still iterating)
 
-The 4K dissolve / audio drift problem. See [`findings.md`](findings.md) for what's already settled and [`../../investigations/ltx-director-4k-transitions.md`](../../investigations/ltx-director-4k-transitions.md) for the running narrative.
+The 4K dissolve / audio drift behaviour. See [`findings.md`](findings.md) for
+what's already settled and
+[`backstory/4k-transitions.md`](backstory/4k-transitions.md) for the running
+narrative that produced this automation.
 
 Open hypotheses being tested:
-- Phase 2 denoise = 0.80 is too aggressive for "preserve stage 1" semantics; sweep down toward 0.30.
+- Phase 2 denoise = 0.80 is too aggressive for "preserve stage 1" semantics; sweep down toward 0.30. *(Two-stage variant — out of scope for this base 1-step automation; tracked here only because the hypothesis predates the split.)*
 - LTX 2.3 prior weakens at 4K → 5K, producing dissolves in inter-keyframe motion.
-- `LTXVLatentUpsampler [BETA]` may inject mouth-region detail that breaks audio sync.
+- `LTXVLatentUpsampler [BETA]` may inject mouth-region detail that breaks audio sync. *(Same — two-stage-specific.)*
 
 ## Where to find everything
 
 | Thing | Path |
 |---|---|
-| Card renderer | [`scripts/make_card.py`](../../../scripts/make_card.py) |
-| Watcher | [`scripts/watch_cards.py`](../../../scripts/watch_cards.py) |
-| `/make-card` skill | [`.claude/skills/make-card/`](../../../.claude/skills/make-card/) |
-| Cross-cutting conventions | [`../CONVENTIONS.md`](../CONVENTIONS.md) |
-| Original investigation narrative | [`../../investigations/ltx-director-4k-transitions.md`](../../investigations/ltx-director-4k-transitions.md) |
+| Card renderer | [`scripts/make_card.py`](../../../../scripts/make_card.py) |
+| Watcher | [`scripts/watch_cards.py`](../../../../scripts/watch_cards.py) |
+| `/make-card` skill | [`.claude/skills/make-card/`](../../../../.claude/skills/make-card/) |
+| Cross-cutting conventions | [`../../CONVENTIONS.md`](../../CONVENTIONS.md) |
+| Backstory narrative | [`backstory/4k-transitions.md`](backstory/4k-transitions.md) |
 | Working folder | `$KOLOOK_AUTOMATIONS_WORK_DIR` (set in `.env` — see `.env.example`) |
 | Handoff to another machine / person | [`handoff-checklist.md`](handoff-checklist.md) |
diff --git a/docs/investigations/00_LTX23-base-1-step/README.md b/docs/automations/LTX-2.3/base-1step/backstory/4k-transitions.md
similarity index 97%
rename from docs/investigations/00_LTX23-base-1-step/README.md
rename to docs/automations/LTX-2.3/base-1step/backstory/4k-transitions.md
index 6dceb35..825df40 100644
--- a/docs/investigations/00_LTX23-base-1-step/README.md
+++ b/docs/automations/LTX-2.3/base-1step/backstory/4k-transitions.md
@@ -1,9 +1,13 @@
 # LTX Director — 4K multi-keyframe transition breakdown
 
-**Branch:** `investigate/ltx-director-4k-transitions`
+The running narrative that produced the [LTX 2.3 base 1-step automation](../README.md).
+Architectural mechanics, observations across four rounds (HD vs 2K vs 4K,
+two-stage workflow, scheduler-shape lock-in), and the open questions that
+graduated to [`../findings.md`](../findings.md).
+
 **Target node:** WhatDreamsCost-ComfyUI → `LTXDirector` (v1.3.2)
-**Status:** investigation kickoff — no code changes yet.
-**Date:** 2026-05-16
+**Status:** narrative complete; live iteration continues per [`../README.md`](../README.md). Audio-file lip-sync work split into the sibling [`../../audio-lipsync/`](../../audio-lipsync/) automation.
+**Started:** 2026-05-16
 
 ---
 
diff --git a/docs/investigations/experiments/baseline.html b/docs/automations/LTX-2.3/base-1step/example-cards/baseline.html
similarity index 100%
rename from docs/investigations/experiments/baseline.html
rename to docs/automations/LTX-2.3/base-1step/example-cards/baseline.html
diff --git a/docs/investigations/experiments/combined-card.html b/docs/automations/LTX-2.3/base-1step/example-cards/combined-card.html
similarity index 100%
rename from docs/investigations/experiments/combined-card.html
rename to docs/automations/LTX-2.3/base-1step/example-cards/combined-card.html
diff --git a/docs/investigations/experiments/run-001-card.html b/docs/automations/LTX-2.3/base-1step/example-cards/run-001-card.html
similarity index 100%
rename from docs/investigations/experiments/run-001-card.html
rename to docs/automations/LTX-2.3/base-1step/example-cards/run-001-card.html
diff --git a/docs/investigations/experiments/run-001-card.png b/docs/automations/LTX-2.3/base-1step/example-cards/run-001-card.png
similarity index 100%
rename from docs/investigations/experiments/run-001-card.png
rename to docs/automations/LTX-2.3/base-1step/example-cards/run-001-card.png
diff --git a/docs/investigations/experiments/run-v04-card.png b/docs/automations/LTX-2.3/base-1step/example-cards/run-v04-card.png
similarity index 100%
rename from docs/investigations/experiments/run-v04-card.png
rename to docs/automations/LTX-2.3/base-1step/example-cards/run-v04-card.png
diff --git a/docs/automations/LTX-2.3/findings.md b/docs/automations/LTX-2.3/base-1step/findings.md
similarity index 90%
rename from docs/automations/LTX-2.3/findings.md
rename to docs/automations/LTX-2.3/base-1step/findings.md
index c50b2a7..7746795 100644
--- a/docs/automations/LTX-2.3/findings.md
+++ b/docs/automations/LTX-2.3/base-1step/findings.md
@@ -1,6 +1,16 @@
-# LTX 2.3 — promoted findings
+# LTX 2.3 base — promoted findings
+
+Settled conclusions from the iteration loop. Entries graduate here from the
+running per-project `_AI/iterations.md` log (lives outside the repo, in your
+working folder; see [`../README.md`](README.md) for the contract).
+
+This file is scoped to the **single-stage LTX 2.3 base** automation. The
+spatial-upscaler architecture facts at the bottom of this file are model-level
+truths that any LTX 2.3 automation can rely on (including the sibling
+[`../audio-lipsync/`](../audio-lipsync/) module); they sit here because this
+is where they were first established. Lift to a shared model-architecture doc
+if a third LTX module ever needs to reference them.
 
-Settled conclusions from the iteration loop. Entries graduate here from the running [iterations log](../../../).<br>
 Anything in this file is **locked in** — don't sweep it again without a reason.
 
 ## Sampling — scheduler shape
@@ -11,7 +21,7 @@ The sigma curve it produces — flat plateau near σ ≈ 1.0 for the first ~5 st
 
 - Other scheduler shapes degrade fast motion and keyframe transitions.
 - Both Phase 1 and Phase 2 keep this scheduler. Phase 2 starts slightly lower on σ because the lower denoise value shifts the entry point down the curve.
-- Source: [investigation Round 4](../../investigations/ltx-director-4k-transitions.md#round-4--scheduler-finding--tracking-system-plan).
+- Source: [backstory Round 4](backstory/4k-transitions.md#round-4--scheduler-finding--tracking-system-plan).
 
 ## Sampling — locked knobs
 
@@ -101,7 +111,7 @@ Two-stage = render at half-res Phase 1, upscale + resample at Phase 2 via `LTXVL
 
 Current working hypothesis (Round 3 of investigation): #1 is dominant; #2 is a secondary contributor; #3 is the floor.
 
-See [`../../investigations/ltx-director-4k-transitions.md`](../../investigations/ltx-director-4k-transitions.md) for the full hypothesis tree and test plan.
+See [`backstory/4k-transitions.md`](backstory/4k-transitions.md) for the full hypothesis tree and test plan.
 
 ## How to add a new finding
 
diff --git a/docs/automations/LTX-2.3/handoff-checklist.md b/docs/automations/LTX-2.3/base-1step/handoff-checklist.md
similarity index 85%
rename from docs/automations/LTX-2.3/handoff-checklist.md
rename to docs/automations/LTX-2.3/base-1step/handoff-checklist.md
index 318ea96..34bcbad 100644
--- a/docs/automations/LTX-2.3/handoff-checklist.md
+++ b/docs/automations/LTX-2.3/base-1step/handoff-checklist.md
@@ -1,12 +1,14 @@
-# Handoff checklist — LTX 2.3 loop
+# Handoff checklist — LTX 2.3 base (single-stage) automation
 
-Use this when picking up the loop on a different machine, or handing over to someone else. Target time-to-first-card: ~5 minutes.
+Use this when picking up this automation on a different machine, or handing over to someone else. Target time-to-first-card: ~5 minutes.
+
+The sibling [`../audio-lipsync/`](../audio-lipsync/) automation has its own handoff checklist — that one needs the WhatDreamsCost Koolook fork loaded and a workflow JSON that uses the Koolook-namespaced node. This one does not.
 
 ## 1. Repo + branch
 
 - [ ] Clone `ComfyUI-Koolook`.
-- [ ] Check out the branch carrying the loop tooling — currently `investigate/ltx-director-4k-transitions`. (Eventually expected to merge to `main`.)
-- [ ] Read [`README.md`](README.md) (this folder) and [`../CONVENTIONS.md`](../CONVENTIONS.md).
+- [ ] Use `main` (the loop tooling is part of the standard tree).
+- [ ] Read [`README.md`](README.md) (this folder) and [`../../CONVENTIONS.md`](../../CONVENTIONS.md).
 
 ## 2. Python + Pillow
 
@@ -24,7 +26,7 @@ Use this when picking up the loop on a different machine, or handing over to som
   - `was-node-suite-comfyui` (`Text Multiline`).
   - `rgthree-comfy` (helpful for finding nodes by ID).
   - `pythongosssss/ComfyUI-Custom-Scripts` (optional — workflow auto-save).
-- [ ] An LTX-2.3 workflow with the three required Text Multiline nodes (see `../CONVENTIONS.md` §2): `Working_Folder_PATH`, `OVERLAY - INFO`, `OVERLAY - FEEDBACK`.
+- [ ] An LTX-2.3 workflow with the three required Text Multiline nodes (see `../../CONVENTIONS.md` §2): `Working_Folder_PATH`, `OVERLAY - INFO`, `OVERLAY - FEEDBACK`.
 
 ## 4. Working folder
 
diff --git a/docs/automations/README.md b/docs/automations/README.md
index 06ca7c0..2190e18 100644
--- a/docs/automations/README.md
+++ b/docs/automations/README.md
@@ -1,8 +1,15 @@
 # Automations
 
-AI-assisted iteration loops for evaluating generative models inside ComfyUI.
+AI-managed ComfyUI iteration loops. Each automation module is one
+self-contained workflow: own ComfyUI session, own workflow JSON, own
+narrative, own findings — typically focused on one specific generation
+task (a single-stage render path, an audio-driven lip-sync, an upscale
+recipe, etc.). The same diffusion model can host several modules side
+by side; one folder per **task**, not one per model.
 
-Each subfolder is one model under study. The loop pattern is the same across all of them; the model-specific knobs, conventions, and findings live in the subfolder.
+The agent's role inside each module is the same: watch the maintainer's
+workflow edits, score feedback, render tracking cards via `/make-card`,
+and — when the task needs it — modify code in `forks/` or `scripts/`.
 
 > **Want the visual walkthrough?** → [`index.html`](index.html) presents the setup and loop as an HTML overview.
 >
@@ -22,18 +29,40 @@ ComfyUI-Koolook/
 ├── scripts/
 │   ├── make_card.py                         renders a card PNG from workflow JSON
 │   └── watch_cards.py                       optional polling watcher
+├── forks/                                   ← any modified upstream node code an
+│                                            automation needs (e.g. whatdreamscost_koolook/)
 └── docs/automations/
     ├── README.md                            you are here
-    ├── CONVENTIONS.md                       cross-cutting rules
-    └── LTX-2.3/                             one folder per model under study
-        ├── README.md                        loop entry point for this model
-        ├── handoff-checklist.md             5-minute onboarding
-        └── findings.md                      locked-in conclusions
+    ├── CONVENTIONS.md                       cross-cutting loop contract
+    ├── CHEATSHEET.md                        one-page reminder
+    └── LTX-2.3/                             grouping by diffusion model
+        ├── base-1step/                       ← one automation module
+        │   ├── README.md                     loop entry point for this task
+        │   ├── handoff-checklist.md
+        │   ├── findings.md                   locked-in conclusions for THIS task
+        │   ├── backstory/                    narrative that produced the module
+        │   └── example-cards/                rendered cards from past runs
+        └── audio-lipsync/                    ← another automation module, same model
+            ├── README.md
+            ├── handoff-checklist.md
+            ├── findings.md
+            ├── backstory/
+            └── runs/                         per-render snapshots in the repo
+                ├── LOOP.md                   per-task iteration protocol
+                └── log.md                    rolling table of runs
 ```
 
+The model-name folder (`LTX-2.3/`) is **only a grouping** — it doesn't
+carry shared docs of its own. Each automation under it is independent
+(own README, own findings). Model-architecture facts that genuinely
+apply to every module on that model can live in any one module's
+`findings.md` and be cross-linked from siblings (or lifted to a shared
+file later if a third module materialises and the duplication is real).
+
 ### Per-project working folder (lives outside the repo)
 
-Pointed at by `KOLOOK_AUTOMATIONS_WORK_DIR` in `.env`. One folder per project. Holds:
+Pointed at by `KOLOOK_AUTOMATIONS_WORK_DIR` in `.env`. One folder per
+project. Holds:
 
 ```
 <working folder>/                            e.g. JOBS/<client>/<scene>/ComfyUI-working-folder
@@ -45,29 +74,45 @@ Pointed at by `KOLOOK_AUTOMATIONS_WORK_DIR` in `.env`. One folder per project. H
     └── iterations.md                        append-only log, one row per render
 ```
 
-The `_AI/` split lets you wipe agent artifacts without touching user content (or vice-versa). You can delete `_AI/` to reset the history; you can delete the JSONs and MP4s without losing the iteration log.
+The `_AI/` split lets you wipe agent artifacts without touching user
+content (or vice-versa). You can delete `_AI/` to reset the history;
+you can delete the JSONs and MP4s without losing the iteration log.
+
+For automations that ship in-repo `runs/` snapshots (the
+audio-lipsync module does this — because the iteration touches
+fork code, not just widgets), the snapshots live inside the module
+folder. The `_AI/iterations.md` outside-the-repo log is still the
+authoritative running record; the in-repo `runs/log.md` is the
+condensed cross-machine summary.
 
 ## What lives here
 
-| Subfolder | Status | Scope |
-|---|---|---|
-| [`LTX-2.3/`](LTX-2.3/README.md) | active | Lightricks LTX 2.3 video diffusion — Director node behaviour, 4K transitions, audio sync |
+| Module | Model | Status | Task |
+|---|---|---|---|
+| [`LTX-2.3/base-1step/`](LTX-2.3/base-1step/README.md) | LTX 2.3 | active | Single-stage render: brief once, sample 8 steps, no Phase-2 upscale. Model-generated audio. |
+| [`LTX-2.3/audio-lipsync/`](LTX-2.3/audio-lipsync/README.md) | LTX 2.3 | active | Audio-file-driven lip-sync. Modified `LTXDirector` (Prompt-Relay paper σ + `relay_overrides` widget). Ships a fork at [`forks/whatdreamscost_koolook/`](../../forks/whatdreamscost_koolook/). |
 
-## The pattern (every loop looks like this)
+## The pattern (every module looks like this)
 
-1. **One working folder per project** holds everything for one iteration: workflow JSON + rendered video at the root (user content), plus an `_AI/` subfolder for the agent-managed card + iterations log.
+1. **One working folder per project** holds everything for the iteration: workflow JSON + rendered video at the root (user content), plus an `_AI/` subfolder for the agent-managed card + iterations log.
 2. **Three named Text Multiline nodes** inside the ComfyUI workflow form the data contract:
    - `Working_Folder_PATH` — authoritative output path.
    - `OVERLAY - INFO` — the run params summary + free-text `BASE (notes):` for what changed this run.
    - `OVERLAY - FEEDBACK` — observations on the rendered video + score lines (`motion: 4/5`, `sync: 5/5`, `sharp: 4/5`).
 3. **The `/make-card` skill** (or `scripts/make_card.py` directly) reads the latest JSON in the working folder, extracts every parameter, renders `_AI/card.png`, and appends a row to `_AI/iterations.md`. Cards travel alongside the video into the NLE for side-by-side comparison.
-4. **Findings get promoted** from per-run notes into the model's `findings.md` when a knob's behaviour is stable enough to lock in.
+4. **Code modifications go in `forks/`** when a module needs to alter an upstream node. The agent edits the fork file in the repo; the maintainer runs `dev-sync` to copy it into the live install. See [`../../forks/README.md`](../../forks/README.md).
+5. **Findings get promoted** from per-run notes into the module's `findings.md` when a knob's behaviour is stable enough to lock in (≥ 3 confirming runs).
 
 Full cross-cutting contract: [`CONVENTIONS.md`](CONVENTIONS.md).
 
-## Starting a new loop (new model)
+## Starting a new automation module
 
-1. Pick a folder name — short, lowercase, hyphen-separated (e.g. `wan-2.1`, `audio-ldm-3`).
-2. Copy `LTX-2.3/README.md` and `LTX-2.3/handoff-checklist.md` to the new folder as templates.
-3. Replace LTX-specific node names, parameter sets, and finding placeholders with the new model's.
-4. The cross-cutting tooling (`scripts/make_card.py`, `.claude/skills/make-card/`) is model-agnostic — no changes needed there unless the new model needs different fields extracted.
+1. Pick a folder name — short, lowercase, hyphen-separated, descriptive of the *task* (e.g. `LTX-2.3/two-stage-upscale/`, `wan-2.1/i2v-from-still/`). The model-name grouping is optional but recommended once there are 2+ modules on the same model.
+2. Copy `LTX-2.3/base-1step/README.md` and `handoff-checklist.md` to the new folder as templates.
+3. Rewrite the *task scope* paragraph at the top. Replace task-specific node names, parameter sets, and finding placeholders with the new module's.
+4. Add a row to the "What lives here" table above.
+5. If the module needs to modify upstream node code, run the
+   [`add-external-fork`](../../.claude/skills/add-external-fork/) skill
+   first to register the fork properly; then the module can reference
+   `forks/<name>_koolook/`.
+6. The cross-cutting tooling (`scripts/make_card.py`, `.claude/skills/make-card/`) is module-agnostic — no changes needed there unless the new module needs different fields extracted from its workflow.
diff --git a/docs/automations/index.html b/docs/automations/index.html
index ca19d36..7272fcf 100644
--- a/docs/automations/index.html
+++ b/docs/automations/index.html
@@ -978,7 +978,7 @@ Card ready:
     </section>
 
     <aside class="callout">
-      <p><strong>Reference layer:</strong> use <a href="./README.md">README.md</a> for the overview, <a href="./CONVENTIONS.md">CONVENTIONS.md</a> for the shared contract, <a href="./CHEATSHEET.md">CHEATSHEET.md</a> during a live session, and <a href="./LTX-2.3/README.md">LTX-2.3/README.md</a> for the active model loop.</p>
+      <p><strong>Reference layer:</strong> use <a href="./README.md">README.md</a> for the overview, <a href="./CONVENTIONS.md">CONVENTIONS.md</a> for the shared contract, <a href="./CHEATSHEET.md">CHEATSHEET.md</a> during a live session, and the per-module READMEs — e.g. <a href="./LTX-2.3/base-1step/README.md">LTX-2.3/base-1step/README.md</a> and <a href="./LTX-2.3/audio-lipsync/README.md">LTX-2.3/audio-lipsync/README.md</a>.</p>
     </aside>
   </main>
 </body>
diff --git a/docs/investigations/01_LTX23-audio-file-lipsync/README.md b/docs/investigations/01_LTX23-audio-file-lipsync/README.md
deleted file mode 100644
index 3021761..0000000
--- a/docs/investigations/01_LTX23-audio-file-lipsync/README.md
+++ /dev/null
@@ -1,103 +0,0 @@
-# 01 — LTX 2.3 Director: audio-file lip-sync investigation
-
-**Tracking issue:** [#177](https://github.com/malkuthro/ComfyUI-Koolook/issues/177)
-**Related:** [`../00_LTX23-base-1-step/README.md`](../00_LTX23-base-1-step/README.md) (the foundational LTX 2.3 investigation — 4K dissolves, 2-stage workflow, scheduler).
-**Started:** 2026-05-28
-**Status:** investigation-phase patches applied to live install; sync via `sync-audio`.
-
----
-
-## Problem
-
-When `use_custom_audio: true` and an external audio file is provided to `LTXDirector`, the resulting video is broken: no lip-sync, no meaningful animation, prompt adherence collapses. The only mode that produces good output is `use_custom_audio: false` with `[Audio]: …` in the prompt (model-generated audio).
-
-Goal: investigate whether the Prompt Relay cross-attention math can be tuned to give the text prompt enough pull on the video to overcome the audio-driven prior baked into LTX 2.3's training distribution.
-
-## Folder map
-
-```
-01_LTX23-audio-file-lipsync/
-├── README.md           ← this file
-├── upstream.json       ← upstream version pin + sync target + file list
-├── patches/            ← source of truth for modified upstream code
-│   ├── ltx_director.py
-│   └── prompt_relay.py
-└── runs/               ← per-render snapshots
-    ├── LOOP.md         ← the iteration protocol
-    ├── log.md          ← rolling table of runs
-    └── run-NNN_<label>/
-        ├── workflow.json
-        ├── relay_overrides.txt
-        ├── patch_state.txt
-        └── notes.md
-```
-
-## Patch summary
-
-### Patch 1 — `prompt_relay.py`
-
-`build_segments` now computes σ per-segment using the Prompt-Relay paper formula:
-
-```
-σ = (L − w_eff) / (2 · √ln(1/ε))
-```
-
-Original code used a length-independent `σ = 1/ln(1/ε)` (≈ 0.1448 at ε=0.001), producing a razor-sharp boundary that did not scale with L. The new formula calibrates the penalty so it hits threshold ε exactly at the segment boundary regardless of segment length.
-
-A `SIGMA_FALLBACK = 0.1448` preserves the prior constant for the degenerate `L ≤ w_eff` corner. Per-segment σ is now logged: `[PromptRelay] seg L=… w_v=… sigma_v=…`.
-
-### Patch 2 — `ltx_director.py`
-
-The `LTXDirector` node gains a new optional input `relay_overrides` (multiline string, default `""`). The maintainer types a JSON dict of Prompt Relay knobs directly into the node's canvas widget. The values live entirely inside the workflow JSON — no disk file, no env var.
-
-Supported keys (all optional):
-
-| Key | Type | Default | Effect |
-|---|---|---|---|
-| `video_strength` | float | 1.0 | Multiplies `attn2` penalty (video × text). Raise to tighten per-segment text routing. |
-| `video_window_scale` | float | 1.0 | Scales the flat-top window width on the video side. < 1.0 = penalty kicks in closer to segment center. |
-| `audio_strength` | float | 1.0 | Same for `audio_attn2`. **Note:** no-op for video output when `use_custom_audio=true` (audio latent is frozen at `noise_mask=0`). |
-| `audio_window_scale` | float | 1.0 | Audio-side window. |
-| `audio_epsilon` | float | inherit | Independent σ for the audio path. |
-
-Underscore-prefixed keys are ignored (use for inline JSON comments). Example value to paste:
-
-```json
-{"video_strength": 10.0}
-```
-
-Empty field → upstream Prompt Relay behaviour.
-
-## Sync — pushing patches to the live install
-
-MAIN is the source of truth. The live install at `$KOLOOK_WHATDREAMSCOST_PATH` is a destination only.
-
-**Trigger phrase: `sync-audio`** (declared in [`upstream.json`](upstream.json)). Equivalent CLI:
-
-```
-python scripts/sync_investigation_patches.py 01_LTX23-audio-file-lipsync
-```
-
-The script reads [`upstream.json`](upstream.json), backs up the target's current state (`.bak.<YYYYMMDD>`, once per day), copies `patches/*.py` over, prints a 2-line report.
-
-## Test workflow
-
-`E:/_AI/portable/ComfyUI_windows_312/ComfyUI/user/default/workflows/LTX-23-audio_tests_v01.json` — the maintainer overwrites this single file from inside ComfyUI between iterations.
-
-See [`runs/LOOP.md`](runs/LOOP.md) for the per-render iteration protocol.
-
-## Reversion (any one works)
-
-1. Restore `.bak.<date>` files in the live install dir (created automatically by the sync script).
-2. `git -C "$KOLOOK_WHATDREAMSCOST_PATH" checkout -- prompt_relay.py ltx_director.py` — upstream is a git clone (verified: `.git` present).
-3. ComfyUI-Manager → Try Update — re-clones from upstream.
-
-## Promotion path
-
-If the patches validate:
-
-1. Run [`license-pre-check`](../../../.claude/skills/license-pre-check/) — upstream is GPL-3.0, Koolook is GPL-3.0 (compatible).
-2. Run [`add-external-fork`](../../../.claude/skills/add-external-fork/) to register `WhatDreamsCost-ComfyUI` in [`../../../forks/forks_manifest.yaml`](../../../forks/forks_manifest.yaml).
-3. Create `forks/ltx_director_koolook/` with namespaced node ID (`LTXDirector_Koolook`) so it coexists with installed upstream.
-4. Update [`../../../forks/THIRD_PARTY.md`](../../../forks/THIRD_PARTY.md).
-5. Promote validated findings to [`../../automations/LTX-2.3/findings.md`](../../automations/LTX-2.3/findings.md) per its "How to add a new finding" rule (≥3 confirming runs).
diff --git a/docs/investigations/01_LTX23-audio-file-lipsync/runs/LOOP.md b/docs/investigations/01_LTX23-audio-file-lipsync/runs/LOOP.md
deleted file mode 100644
index 636ece2..0000000
--- a/docs/investigations/01_LTX23-audio-file-lipsync/runs/LOOP.md
+++ /dev/null
@@ -1,67 +0,0 @@
-# Audio-file lip-sync investigation — iteration loop
-
-**Investigation:** [01_LTX23-audio-file-lipsync](../README.md)
-**Tracking issue:** [malkuthro/ComfyUI-Koolook#177](https://github.com/malkuthro/ComfyUI-Koolook/issues/177)
-**Started:** 2026-05-28
-
----
-
-## The loop
-
-| Step | Who | What |
-|---|---|---|
-| 1 | Maintainer | Edit workflow in ComfyUI (canvas — node widgets, including the `relay_overrides` JSON field on the LTX Director) |
-| 2 | Maintainer | **Save** workflow → overwrites `E:\_AI\portable\ComfyUI_windows_312\ComfyUI\user\default\workflows\LTX-23-audio_tests_v01.json` |
-| 3 | Maintainer | Queue render in ComfyUI |
-| 4 | Maintainer | Report result in chat (verbal feedback — sync state, motion state, prompt adherence) |
-| 5 | Agent | Snapshot current state into a new `run-NNN_<label>/` folder here + append a row to [`log.md`](log.md) |
-| 6 | Agent | Confirm what was captured |
-
-**Save-before-render** is the anchor: the file on disk at the JSON file folder = exactly what produced the render being described. No copy-paste, no version drift.
-
-## Per-run snapshot contents
-
-```
-run-NNN_<label>/
-├── workflow.json           ← copy of LTX-23-audio_tests_v01.json at submission
-├── relay_overrides.txt     ← the LTX Director node's relay_overrides widget value
-├── patch_state.txt         ← MAIN SHA + upstream SHA + which patches were synced
-└── notes.md                ← maintainer's verbal feedback + agent's one-line interp
-```
-
-The `relay_overrides` value is also stored inside `workflow.json` (LTXDirector node widget), but the `.txt` copy makes it diff-friendly in the run folder.
-
-## Trigger detection
-
-No magic phrase. Whenever the maintainer describes a render result in chat, the agent treats it as a feedback signal and creates a new run folder. The agent confirms in chat what was captured; the maintainer can rename, delete, or correct.
-
-To share a workflow file *without* logging it as a run, say "no log" or "don't log this" in the chat message.
-
-## Run labels
-
-Auto-generated from key knob state + feedback summary, e.g.:
-
-- `run-001_no-patch_broken-baseline`
-- `run-002_vstr10_no-change`
-- `run-003_vstr25_some-motion-recovered`
-- `run-004_vstr10_astr0.5_sync-partial`
-
-The maintainer can override any label by stating it explicitly.
-
-## Sync to live install — `sync-audio`
-
-Before the first render with new patches, sync MAIN → live install:
-
-```
-python scripts/sync_investigation_patches.py 01_LTX23-audio-file-lipsync
-```
-
-Or just say "**sync-audio**" in chat and the agent runs it. Backs up the target's current state to `.bak.<YYYYMMDD>` before overwriting. See the investigation [README](../README.md) and [`upstream.json`](../upstream.json) for details.
-
-## Asking "what's the loop?"
-
-Point future-session-me at this file: `docs/investigations/01_LTX23-audio-file-lipsync/runs/LOOP.md`. Everything we agreed lives here.
-
-## Glossary
-
-See [`../../../reference/glossary.md`](../../../reference/glossary.md) for definitions of *JSON file folder*, *Loop*, *Run*, *Investigation patches*, *Investigation folder*.
diff --git a/docs/investigations/01_LTX23-audio-file-lipsync/upstream.json b/docs/investigations/01_LTX23-audio-file-lipsync/upstream.json
deleted file mode 100644
index 0db7264..0000000
--- a/docs/investigations/01_LTX23-audio-file-lipsync/upstream.json
+++ /dev/null
@@ -1,22 +0,0 @@
-{
-  "_purpose": "Source-of-truth pin for the upstream files this investigation modifies. Read by scripts/sync_investigation_patches.py.",
-  "_underscore_keys": "All keys starting with underscore are ignored by the loader. Use them for inline documentation.",
-
-  "investigation": "01_LTX23-audio-file-lipsync",
-  "trigger": "sync-audio",
-
-  "upstream": {
-    "repo": "https://github.com/WhatDreamsCost/WhatDreamsCost-ComfyUI",
-    "version": "v1.3.2",
-    "pinned_commit": "e81223a"
-  },
-
-  "_sync_target_env_doc": "Name of the env var (in .env) that holds the absolute path to the live install dir. Script errors cleanly if unset.",
-  "sync_target_env": "KOLOOK_WHATDREAMSCOST_PATH",
-
-  "_files_doc": "Filenames under patches/ to copy into the target dir. Each gets a per-day backup (<filename>.bak.<YYYYMMDD>) before overwrite.",
-  "files": [
-    "ltx_director.py",
-    "prompt_relay.py"
-  ]
-}
diff --git a/docs/reference/glossary.md b/docs/reference/glossary.md
index 7dc83d9..1b625bf 100644
--- a/docs/reference/glossary.md
+++ b/docs/reference/glossary.md
@@ -73,65 +73,71 @@ Short, plain-English definitions for this repo workflow.
   (`comfyui-easy-use/web_version/v1/js/getset.js`) and simulating the relevant
   LiteGraph shape locally when the live `app.graph` object is not exposed.
 
-## Investigation folder
-- A subfolder under `docs/investigations/` that holds everything related to
-  one investigation — the narrative README, an `upstream.yaml` pin file,
-  modified upstream code under `patches/`, and per-render snapshots under
-  `runs/`.
-- Numbered prefix for ordering and short topic identifier:
-  `docs/investigations/<NN>_<topic-slug>/`.
-- Examples: `00_LTX23-base-1-step/`, `01_LTX23-audio-file-lipsync/`.
-- Created when a piece of investigative work needs its own code patches and
-  iteration log; promoted to a proper `forks/<name>_koolook/` fork when the
-  patches validate.
-
-## JSON file folder
-- ComfyUI's workflow library directory where the maintainer overwrites a
-  single workflow file between iterations.
-- Current example (investigation 01): `E:\_AI\portable\ComfyUI_windows_312\ComfyUI\user\default\workflows\LTX-23-audio_tests_v01.json`.
-- Read-only from the agent's perspective — never edited by the agent
-  (preserves the ComfyUI canvas layout). Agent copies it into the
-  investigation's `runs/run-NNN_*/` folder on each render.
+## Automation module
+- A self-contained AI-managed ComfyUI iteration task. Lives under
+  `docs/automations/<grouping>/<task>/`, with the grouping typically being
+  the diffusion model (`LTX-2.3/`) and the task being a specific generation
+  goal (`base-1step/`, `audio-lipsync/`).
+- Each module owns: a `README.md` (loop entry + workflow contract), a
+  `handoff-checklist.md` (5-minute bootstrap), a `findings.md` (locked-in
+  conclusions for that task), optionally a `backstory/` folder (the
+  narrative that produced the module), optionally a `runs/` folder for
+  in-repo run snapshots when the iteration touches code (not just widget
+  values).
+- Modules are independent: own workflow JSON, own working folder, own
+  findings. The model grouping is only structural — it does not carry
+  shared docs unless duplication forces a future `_shared/` extraction.
+- When a module needs to modify an upstream node's code, the modification
+  lives under `forks/<package>_koolook/` per the fork pattern (see
+  *Wrapper* and *Version Folder* above), and the module's README
+  cross-references the fork.
 
 ## Loop
-- The save → render → feedback → snapshot cycle for an investigation.
-- Step 1: maintainer edits and **saves** workflow in ComfyUI (overwrites the
-  JSON file folder target).
-- Step 2: maintainer queues render.
-- Step 3: maintainer reports result in chat.
-- Step 4: agent snapshots current state (workflow + relay_overrides + active
-  patches) into a new run folder under
-  `docs/investigations/<NN>_<topic>/runs/`.
-- Per-investigation protocol lives at
-  `docs/investigations/<NN>_<topic>/runs/LOOP.md`.
+- The save → render → feedback → snapshot cycle inside an automation
+  module.
+- Step 1: maintainer edits a knob in ComfyUI (or in a `forks/` source
+  file) and **saves** the workflow.
+- Step 2: maintainer queues the render.
+- Step 3: maintainer reports the result in chat.
+- Step 4: agent snapshots current state into the module's
+  `runs/run-NNN_<label>/` (when the module ships in-repo runs) or just
+  appends to the working-folder `_AI/iterations.md` (when card-and-log
+  is all that's needed).
+- Module-specific protocol lives at `<module>/runs/LOOP.md` for the
+  fork-touching modules; lighter modules document the loop inline in
+  their `README.md`.
 
 ## Run
 - One iteration of the loop.
-- Folder named `run-NNN_<short-knob-summary>_<short-result-tag>` inside
-  `docs/investigations/<NN>_<topic>/runs/`.
-- Contains: `workflow.json` (snapshot), `relay_overrides.txt`,
-  `patch_state.txt` (MAIN SHA + upstream SHA + synced files), and `notes.md`
-  (maintainer feedback + agent interpretation).
+- For modules that ship in-repo run snapshots, a `run-NNN_<short-knob-summary>_<short-result-tag>`
+  folder under `<module>/runs/` containing at minimum a `workflow.json`
+  copy and a `notes.md` (maintainer feedback + agent interpretation).
+- For all modules, also a row in the per-project working-folder
+  `_AI/iterations.md` log (auto-rendered by `/make-card`).
 
-## Investigation patches
-- Modifications to a third-party node's source code, applied during the
-  investigation phase before a fork is formally registered under `forks/`.
-- Source of truth lives in
-  `docs/investigations/<NN>_<topic>/patches/<file>` — versioned by git.
-- Pushed to the live install via
-  `python scripts/sync_investigation_patches.py <NN>_<topic>`, which reads
-  `upstream.yaml` from the investigation folder for the target path and
-  file list.
-- Each investigation declares its own short chat-trigger phrase via
-  `trigger:` in `upstream.yaml` (e.g. `sync-audio` for investigation 01).
-- Promoted to a proper `forks/<name>_koolook/` fork once the approach
-  validates (≥ 3 confirming runs per the LTX-2.3 findings rule).
+## Backstory
+- The running narrative that produced an automation module — the
+  problem, the mechanism, the hypotheses considered, the rationale for
+  why the module exists. Lives at `<module>/backstory/<topic>.md`.
+- Distinct from `findings.md` (locked-in conclusions) and
+  `runs/log.md` (rolling table of renders). The backstory is a
+  reference for *why* and *how it got here*; findings are *what's
+  true now*.
 
-## `sync_investigation_patches.py`
-- Helper script that copies an investigation's `patches/*` files to the
-  live install path declared in its `upstream.yaml`.
-- Mirrors the pattern of `scripts/sync_to_dev.py` but for third-party node
-  modifications outside `KOLOOK_COMFYUI_DEV_PATH`.
-- Creates a per-day backup of the target's current state
-  (`<filename>.bak.<YYYYMMDD>`) before overwriting.
-- User-initiated only (never automatic) — same rule as `dev-sync`.
+## Working folder
+- The outside-the-repo per-project folder pointed at by
+  `KOLOOK_AUTOMATIONS_WORK_DIR` in `.env`. Holds workflow JSON,
+  rendered video, and the agent-managed `_AI/` subfolder with
+  `card.png` + append-only `iterations.md`.
+- One working folder per project. Multiple automation modules can
+  point at the same working folder if they share workflow files;
+  more commonly, each module's iteration uses its own working folder.
+
+## Card
+- `_AI/card.png` — the per-render tracking visual rendered by the
+  `/make-card` skill (or `scripts/make_card.py` directly). Stable
+  filename, overwritten each run; the maintainer's NLE points at it
+  once.
+- Renders from the latest workflow JSON in the working folder. Format
+  and palette mirror `docs/designs/snapshot-dialogs.html`. See
+  `docs/automations/CONVENTIONS.md` §3.
diff --git a/forks/THIRD_PARTY.md b/forks/THIRD_PARTY.md
index a26e391..4e9c166 100644
--- a/forks/THIRD_PARTY.md
+++ b/forks/THIRD_PARTY.md
@@ -146,6 +146,66 @@ below — GPL-3.0 §5(c) requires the whole work to be GPL-3.0.
   pipeline and routes color-prepped frames directly to `vae.encode()`.
 - **Last reviewed:** 2026-05-03
 
+### WhatDreamsCost/WhatDreamsCost-ComfyUI — v1.3.2 LTX Director subset (Koolook fork)
+
+- **Name:** WhatDreamsCost-ComfyUI
+- **Upstream repo URL:** https://github.com/WhatDreamsCost/WhatDreamsCost-ComfyUI
+- **Upstream commit/tag used:** `e81223a2add687555a6371e311b325880bf7c3c9`
+  (v1.3.2; the latest README-only update on the release commit chain).
+- **License:** GPL-3.0 (verified 2026-05-28 from the upstream `LICENSE`
+  file — *GNU General Public License Version 3, 29 June 2007*).
+- **Local path(s):** [`forks/whatdreamscost_koolook/versions/v1_3_2/`](whatdreamscost_koolook/versions/v1_3_2/)
+- **What changed locally:**
+  - **`ltx_director.py` (modified).** The `LTXDirector` node gains a new
+    optional `relay_overrides` multiline-string input. The maintainer pastes
+    a JSON dict of Prompt-Relay knobs (`video_strength`,
+    `video_window_scale`, `audio_strength`, `audio_window_scale`,
+    `audio_epsilon`) directly into the canvas widget; underscore-prefixed
+    keys are ignored so the field can carry inline JSON comments. The
+    parsed overrides flow through to `build_segments` per render — no
+    disk file, no env var, the values live entirely inside the workflow
+    JSON. Empty field → upstream Prompt-Relay defaults.
+  - **`prompt_relay.py` (modified).** `build_segments` now computes σ
+    per-segment using the Prompt-Relay paper formula
+    `σ = (L − w_eff) / (2 · √ln(1/ε))` instead of the upstream's
+    length-independent `σ = 1/ln(1/ε)` (≈ 0.1448 at ε=0.001). The new
+    formula calibrates the penalty so it hits threshold ε exactly at
+    the segment boundary regardless of segment length. A
+    `SIGMA_FALLBACK = 0.1448` preserves the prior constant for the
+    degenerate `L ≤ w_eff` corner. Per-segment σ is logged.
+  - **`patches.py` (verbatim vendored).** `ltx_director.py` imports
+    `detect_model_type` and `apply_patches` from this file. Carried
+    along unmodified so the fork is self-contained — same precedent as
+    `forks/radiance_koolook/versions/v2_3_3/color_helpers.py`.
+- **What was *not* forked:** The companion `LTXDirectorGuide` node, plus
+  `LTXKeyframer`, `MultiImageLoader`, `LTXSequencer`,
+  `SpeechLengthCalculator`, `LoadAudioUI`, and `LoadVideoUI`. These are
+  unmodified upstream nodes; users need an installed copy of upstream
+  WhatDreamsCost-ComfyUI to use them. The Koolook variant of LTXDirector
+  is namespaced (`LTXDirector__koolook_v1_3_2`) so the two coexist in
+  the node picker.
+- **Why namespaced (`__koolook_v1_3_2`):** per the convention in
+  `forks/README.md`, ports of upstream-named classes carry the version
+  suffix to avoid colliding with an installed copy of the same upstream
+  package. Graphs wiring the Koolook variant pick
+  `LTX Director (Koolook v1.3.2)` from the picker; the unsuffixed
+  `LTX Director` continues to refer to the user's upstream install.
+- **Why a partial fork rather than a subclass:** the two upstream
+  modifications cross multiple call sites inside the `LTXDirector` body
+  and inside the `build_segments` function in `prompt_relay.py`. A
+  subclass override would have to either reach into upstream internals
+  (brittle) or duplicate the bodies (more code than the verbatim fork).
+  The partial fork was the smaller surface.
+- **Maintenance loop:** the audio-lipsync iteration that drives changes
+  here lives at
+  [`../docs/automations/LTX-2.3/audio-lipsync/`](../docs/automations/LTX-2.3/audio-lipsync/).
+  Patches were originally synced into the user's upstream install via
+  `scripts/sync_investigation_patches.py`; with v1.3.2 promoted to a
+  fork, the iteration uses the standard
+  [`../scripts/sync_to_dev.py`](../scripts/sync_to_dev.py) flow and the
+  workflow JSON references the Koolook-suffixed node ID.
+- **Last reviewed:** 2026-05-28
+
 ## De-vendored upstream code (untracked in v0.1.4 / v0.1.5)
 
 Six third-party trees were untracked from MAIN's git index in the
diff --git a/forks/forks_manifest.yaml b/forks/forks_manifest.yaml
index cc104f1..450b5f8 100644
--- a/forks/forks_manifest.yaml
+++ b/forks/forks_manifest.yaml
@@ -1,5 +1,5 @@
 version: 1
-updated_at: "2026-05-04"
+updated_at: "2026-05-28"
 external_forks:
   root_relative_to_main: "../ComfyUI-Forks"
   root_env_var: "KOLOOK_FORKS_DIR"
@@ -39,6 +39,43 @@ entries:
     license_verified_at: "2026-05-03"
     notes: "Mirrors only the RadianceVAE4KEncode/Decode interface surface — Koolook ships a slimmer rank-agnostic reimplementation that handles image sequences (video frames) without the upstream's 4K cosine-blend tile engine, which conflicts with video VAEs (Wan 2.2 etc.) that already do their own temporal stitching."
 
+  - id: "whatdreamscost_koolook_v1_3_2_ltx_director"
+    name: "WhatDreamsCost Koolook v1.3.2 LTX Director subset"
+    source_repo: "https://github.com/WhatDreamsCost/WhatDreamsCost-ComfyUI.git"
+    source_ref: "v1.3.2"
+    pinned_commit: "e81223a2add687555a6371e311b325880bf7c3c9"
+    external_checkout:
+      relative_path_from_forks_root: "whatdreamscost-v1.3.2-koolook"
+      upstream_tracking_path_from_forks_root: "whatdreamscost-main-upstream"
+      default_branch: "main"
+    local_paths:
+      - "forks/whatdreamscost_koolook/__init__.py"
+      - "forks/whatdreamscost_koolook/versions/v1_3_2/__init__.py"
+      - "forks/whatdreamscost_koolook/versions/v1_3_2/UPSTREAM_PIN.yaml"
+      - "forks/whatdreamscost_koolook/versions/v1_3_2/ltx_director.py"
+      - "forks/whatdreamscost_koolook/versions/v1_3_2/prompt_relay.py"
+      - "forks/whatdreamscost_koolook/versions/v1_3_2/patches.py"
+    status: "modified"
+    sync_state: "ltx-director-modified-plus-deps"
+    license: "GPL-3.0"
+    license_verified_at: "2026-05-28"
+    exposed_node_ids:
+      - "LTXDirector__koolook_v1_3_2"
+    notes: |
+      Ships a Koolook variant of upstream's `LTXDirector` only — the companion
+      `LTXDirectorGuide` is consumed from the user's upstream install via the
+      `guide_data -> latent` wiring. The Koolook variant adds:
+        1) a `relay_overrides` multiline JSON input on the LTX Director canvas
+           widget so per-render Prompt-Relay knob overrides live inside the
+           workflow JSON (no disk file / no env var);
+        2) per-segment sigma in `build_segments` matching the Prompt-Relay paper
+           formula σ = (L − w_eff) / (2 · sqrt(ln(1/ε))) instead of upstream's
+           length-independent constant (≈ 0.1448 at ε=0.001).
+      `patches.py` is vendored verbatim from upstream e81223a — `ltx_director.py`
+      imports `detect_model_type` and `apply_patches` from it. The maintainer-
+      facing iteration loop driving changes here lives at
+      `docs/automations/LTX-2.3/audio-lipsync/`.
+
   - id: "easy_resize_inspiration"
     name: "Easy Resize (Koolook reimplementation, inspired by KJ Nodes)"
     source_repo: "https://github.com/kijai/ComfyUI-KJNodes"
diff --git a/forks/whatdreamscost_koolook/README.md b/forks/whatdreamscost_koolook/README.md
new file mode 100644
index 0000000..2b20747
--- /dev/null
+++ b/forks/whatdreamscost_koolook/README.md
@@ -0,0 +1,21 @@
+# WhatDreamsCost Koolook
+
+Versioned local fork of WhatDreamsCost-ComfyUI nodes (LTX Director + supporting
+Prompt-Relay implementation).
+
+- Package entrypoint: `forks/whatdreamscost_koolook/__init__.py`
+- Version folders: `forks/whatdreamscost_koolook/versions/<version>/`
+- Each version folder keeps:
+  - modified node files tracked in MAIN
+  - vendored unmodified upstream deps the modified files import
+  - `UPSTREAM_PIN.yaml` for parity with pinned external raw checkout
+
+Current active version:
+
+- `v1_3_2` — see [`forks/THIRD_PARTY.md`](../THIRD_PARTY.md) for upstream
+  attribution and what changed locally. Tracks
+  [WhatDreamsCost/WhatDreamsCost-ComfyUI](https://github.com/WhatDreamsCost/WhatDreamsCost-ComfyUI)
+  at commit `e81223a`. License: GPL-3.0 (compatible with this pack).
+
+The maintainer-facing iteration loop that drives changes here lives at
+[`docs/automations/LTX-2.3/audio-lipsync/`](../../docs/automations/LTX-2.3/audio-lipsync/).
diff --git a/forks/whatdreamscost_koolook/__init__.py b/forks/whatdreamscost_koolook/__init__.py
new file mode 100644
index 0000000..9ed464c
--- /dev/null
+++ b/forks/whatdreamscost_koolook/__init__.py
@@ -0,0 +1,19 @@
+"""WhatDreamsCost Koolook package entrypoint for versioned node sets.
+
+Each `versions/vX_Y_Z/` subpackage owns a namespaced slice of nodes from a
+pinned upstream commit. This entrypoint merges all version mappings into a
+single dict for the root loader.
+
+Adding a new version: see `.claude/skills/add-external-fork/SKILL.md`.
+"""
+
+from .versions.v1_3_2 import NODE_CLASS_MAPPINGS as V1_3_2_NODE_CLASS_MAPPINGS
+from .versions.v1_3_2 import NODE_DISPLAY_NAME_MAPPINGS as V1_3_2_NODE_DISPLAY_NAME_MAPPINGS
+
+NODE_CLASS_MAPPINGS = {}
+NODE_DISPLAY_NAME_MAPPINGS = {}
+
+NODE_CLASS_MAPPINGS.update(V1_3_2_NODE_CLASS_MAPPINGS)
+NODE_DISPLAY_NAME_MAPPINGS.update(V1_3_2_NODE_DISPLAY_NAME_MAPPINGS)
+
+__all__ = ["NODE_CLASS_MAPPINGS", "NODE_DISPLAY_NAME_MAPPINGS"]
diff --git a/forks/whatdreamscost_koolook/versions/__init__.py b/forks/whatdreamscost_koolook/versions/__init__.py
new file mode 100644
index 0000000..1b2711f
--- /dev/null
+++ b/forks/whatdreamscost_koolook/versions/__init__.py
@@ -0,0 +1 @@
+"""Versioned WhatDreamsCost Koolook node sets."""
diff --git a/forks/whatdreamscost_koolook/versions/v1_3_2/UPSTREAM_PIN.yaml b/forks/whatdreamscost_koolook/versions/v1_3_2/UPSTREAM_PIN.yaml
new file mode 100644
index 0000000..889ffb7
--- /dev/null
+++ b/forks/whatdreamscost_koolook/versions/v1_3_2/UPSTREAM_PIN.yaml
@@ -0,0 +1,22 @@
+source_repo: "https://github.com/WhatDreamsCost/WhatDreamsCost-ComfyUI.git"
+source_ref: "v1.3.2"
+pinned_commit: "e81223a2add687555a6371e311b325880bf7c3c9"
+external_checkout_relative_to_forks_root: "whatdreamscost-v1.3.2-koolook"
+upstream_tracking_relative_to_forks_root: "whatdreamscost-main-upstream"
+external_work_branch: "main"
+license: "GPL-3.0"
+license_verified_at: "2026-05-28"
+notes: |
+  This version folder ships:
+    - ltx_director.py  (MODIFIED — adds `relay_overrides` multiline input)
+    - prompt_relay.py  (MODIFIED — per-segment sigma per Prompt-Relay paper)
+    - patches.py       (UNMODIFIED — vendored verbatim; ltx_director.py
+                        imports detect_model_type / apply_patches from it)
+
+  Only one node is registered: `LTXDirector` (suffixed `__koolook_v1_3_2`
+  to avoid colliding with installed upstream WhatDreamsCost-ComfyUI). The
+  companion `LTXDirectorGuide` is unmodified and consumed from the user's
+  upstream install — graphs wire
+  `LTXDirector__koolook_v1_3_2.guide_data -> LTXDirectorGuide.latent`.
+
+  See forks/THIRD_PARTY.md for the full attribution + diff against upstream.
diff --git a/forks/whatdreamscost_koolook/versions/v1_3_2/__init__.py b/forks/whatdreamscost_koolook/versions/v1_3_2/__init__.py
new file mode 100644
index 0000000..c0ffe45
--- /dev/null
+++ b/forks/whatdreamscost_koolook/versions/v1_3_2/__init__.py
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+"""
+WhatDreamsCost Koolook v1.3.2 mappings.
+
+Loads the modified `LTXDirector` node (with the added `relay_overrides`
+multiline input + per-segment-sigma Prompt-Relay implementation) and
+namespaces its ID with the suffix `__koolook_v1_3_2` to avoid collisions
+with an installed copy of upstream WhatDreamsCost-ComfyUI v1.3.2.
+
+The companion `LTXDirectorGuide` node is intentionally NOT included here:
+it is upstream code we did not modify, and graphs are expected to wire
+`LTXDirector__koolook_v1_3_2.guide_data` into the user's upstream
+`LTXDirectorGuide` (or our future Koolook variant).
+
+See `forks/THIRD_PARTY.md` and `UPSTREAM_PIN.yaml` for upstream
+attribution and the full change log.
+"""
+
+from .ltx_director import LTXDirector
+
+
+NAMESPACE_SUFFIX = "__koolook_v1_3_2"
+DISPLAY_SUFFIX = " (Koolook v1.3.2)"
+
+# IDs in this set are exposed verbatim (no suffix). Empty for this version —
+# the only registered node is LTXDirector, whose plain ID collides with the
+# upstream class of the same name. Future Koolook-original additions here
+# (with no upstream counterpart) can opt out via this set, same as
+# `forks/radiance_koolook/versions/v2_3_3/__init__.py`.
+SKIP_VERSION_SUFFIX: set[str] = set()
+
+
+_BASE_CLASS_MAPPINGS = {
+    "LTXDirector": LTXDirector,
+}
+
+_BASE_DISPLAY_MAPPINGS = {
+    "LTXDirector": "LTX Director",
+}
+
+
+def _namespace_mappings(class_mappings, display_mappings):
+    namespaced_classes = {}
+    namespaced_display = {}
+
+    for node_id, node_cls in class_mappings.items():
+        if node_id in SKIP_VERSION_SUFFIX:
+            namespaced_id = node_id
+            namespaced_display[namespaced_id] = display_mappings.get(node_id, node_id)
+        else:
+            namespaced_id = f"{node_id}{NAMESPACE_SUFFIX}"
+            base_display = display_mappings.get(node_id, node_id)
+            namespaced_display[namespaced_id] = f"{base_display}{DISPLAY_SUFFIX}"
+        namespaced_classes[namespaced_id] = node_cls
+
+    return namespaced_classes, namespaced_display
+
+
+NODE_CLASS_MAPPINGS, NODE_DISPLAY_NAME_MAPPINGS = _namespace_mappings(
+    _BASE_CLASS_MAPPINGS,
+    _BASE_DISPLAY_MAPPINGS,
+)
+
+__all__ = ["NODE_CLASS_MAPPINGS", "NODE_DISPLAY_NAME_MAPPINGS"]
diff --git a/docs/investigations/01_LTX23-audio-file-lipsync/patches/ltx_director.py b/forks/whatdreamscost_koolook/versions/v1_3_2/ltx_director.py
similarity index 100%
rename from docs/investigations/01_LTX23-audio-file-lipsync/patches/ltx_director.py
rename to forks/whatdreamscost_koolook/versions/v1_3_2/ltx_director.py
diff --git a/forks/whatdreamscost_koolook/versions/v1_3_2/patches.py b/forks/whatdreamscost_koolook/versions/v1_3_2/patches.py
new file mode 100644
index 0000000..1404146
--- /dev/null
+++ b/forks/whatdreamscost_koolook/versions/v1_3_2/patches.py
@@ -0,0 +1,167 @@
+import types
+import torch
+import comfy.ldm.modules.attention
+
+
+def _masked_attention(q, k, v, heads, mask, transformer_options={}, **kwargs):
+    # Bypass wrap_attn (sage/etc may ignore masks) by calling attention_pytorch directly.
+    return comfy.ldm.modules.attention.attention_pytorch(
+        q, k, v, heads, mask=mask,
+        _inside_attn_wrapper=True,
+        transformer_options=transformer_options,
+        **kwargs,
+    )
+
+
+def _wan_t2v_forward(self, mask_fn, x, context, transformer_options={}, **kwargs):
+    q = self.norm_q(self.q(x))
+    k = self.norm_k(self.k(context))
+    v = self.v(context)
+
+    mask = mask_fn(q, k, transformer_options)
+    if mask is not None:
+        x = _masked_attention(q, k, v, heads=self.num_heads, mask=mask,
+                              transformer_options=transformer_options)
+    else:
+        x = comfy.ldm.modules.attention.optimized_attention(
+            q, k, v, heads=self.num_heads, transformer_options=transformer_options,
+        )
+    return self.o(x)
+
+
+def _wan_i2v_forward(self, mask_fn, x, context, context_img_len, transformer_options={}, **kwargs):
+    context_img = context[:, :context_img_len]
+    context_text = context[:, context_img_len:]
+
+    q = self.norm_q(self.q(x))
+
+    k_img = self.norm_k_img(self.k_img(context_img))
+    v_img = self.v_img(context_img)
+    img_x = comfy.ldm.modules.attention.optimized_attention(
+        q, k_img, v_img, heads=self.num_heads, transformer_options=transformer_options,
+    )
+
+    k = self.norm_k(self.k(context_text))
+    v = self.v(context_text)
+
+    mask = mask_fn(q, k, transformer_options)
+    if mask is not None:
+        x = _masked_attention(q, k, v, heads=self.num_heads, mask=mask,
+                              transformer_options=transformer_options)
+    else:
+        x = comfy.ldm.modules.attention.optimized_attention(
+            q, k, v, heads=self.num_heads, transformer_options=transformer_options,
+        )
+
+    return self.o(x + img_x)
+
+
+def _ltx_forward(self, mask_fn, x, context=None, mask=None, pe=None, k_pe=None, transformer_options={}):
+    from comfy.ldm.lightricks.model import apply_rotary_emb
+
+    is_self_attn = context is None
+    context = x if is_self_attn else context
+
+    q = self.q_norm(self.to_q(x))
+    k = self.k_norm(self.to_k(context))
+    v = self.to_v(context)
+
+    if pe is not None:
+        q = apply_rotary_emb(q, pe)
+        k = apply_rotary_emb(k, pe if k_pe is None else k_pe)
+
+    if not is_self_attn:
+        temporal_mask = mask_fn(q, k, transformer_options)
+        if temporal_mask is not None:
+            mask = temporal_mask if mask is None else mask + temporal_mask
+
+    if mask is None:
+        out = comfy.ldm.modules.attention.optimized_attention(
+            q, k, v, self.heads, attn_precision=self.attn_precision,
+            transformer_options=transformer_options,
+        )
+    else:
+        out = _masked_attention(q, k, v, self.heads, mask=mask,
+                                attn_precision=self.attn_precision,
+                                transformer_options=transformer_options)
+
+    if self.to_gate_logits is not None:
+        gate_logits = self.to_gate_logits(x)
+        b, t, _ = out.shape
+        out = out.view(b, t, self.heads, self.dim_head)
+        out = out * (2.0 * torch.sigmoid(gate_logits)).unsqueeze(-1)
+        out = out.view(b, t, self.heads * self.dim_head)
+
+    return self.to_out(out)
+
+
+class _CrossAttnPatch:
+    """Descriptor that binds (impl, mask_fn) as a method onto a cross-attn module."""
+
+    def __init__(self, impl, mask_fn):
+        self.impl = impl
+        self.mask_fn = mask_fn
+
+    def __get__(self, obj, objtype=None):
+        impl, mask_fn = self.impl, self.mask_fn
+
+        def wrapped(self_module, *args, **kwargs):
+            return impl(self_module, mask_fn, *args, **kwargs)
+
+        return types.MethodType(wrapped, obj)
+
+
+def detect_model_type(model):
+    """Return (arch, patch_size, temporal_stride) for latent geometry.
+
+    temporal_stride is the VAE's pixel→latent temporal compression factor,
+    used to convert user-facing pixel frame counts to latent frames.
+    """
+    diff_model = model.model.diffusion_model
+
+    if hasattr(diff_model, "patch_size") and not hasattr(diff_model, "patchifier"):
+        return "wan", tuple(diff_model.patch_size), 4
+
+    if hasattr(diff_model, "patchifier"):
+        return "ltx", (1, 1, 1), int(diff_model.vae_scale_factors[0])
+
+    raise ValueError(
+        f"Unsupported model type: {type(diff_model).__name__}. "
+        f"Currently supports Wan and LTX models."
+    )
+
+
+def _check_unpatched(model_clone, key):
+    if key in getattr(model_clone, "object_patches", {}):
+        raise RuntimeError(
+            f"PromptRelay: cross-attention forward at '{key}' is already patched by "
+            "another node (e.g. KJNodes NAG). Stacking is not supported — remove the "
+            "conflicting node."
+        )
+
+
+def apply_patches(model_clone, arch, mask_fn):
+    diffusion_model = model_clone.get_model_object("diffusion_model")
+
+    if arch == "wan":
+        from comfy.ldm.wan.model import WanI2VCrossAttention
+        for idx, block in enumerate(diffusion_model.blocks):
+            key = f"diffusion_model.blocks.{idx}.cross_attn.forward"
+            _check_unpatched(model_clone, key)
+            cross_attn = block.cross_attn
+            impl = _wan_i2v_forward if isinstance(cross_attn, WanI2VCrossAttention) else _wan_t2v_forward
+            model_clone.add_object_patch(key, _CrossAttnPatch(impl, mask_fn).__get__(cross_attn, cross_attn.__class__))
+        return
+
+    if arch == "ltx":
+        for idx, block in enumerate(diffusion_model.transformer_blocks):
+            for attr in ("attn2", "audio_attn2"):
+                module = getattr(block, attr, None)
+                if module is None:
+                    continue
+                key = f"diffusion_model.transformer_blocks.{idx}.{attr}.forward"
+                _check_unpatched(model_clone, key)
+                model_clone.add_object_patch(key, _CrossAttnPatch(_ltx_forward, mask_fn).__get__(module, module.__class__))
+        return
+
+    raise ValueError(f"Unknown model arch: {arch}")
diff --git a/docs/investigations/01_LTX23-audio-file-lipsync/patches/prompt_relay.py b/forks/whatdreamscost_koolook/versions/v1_3_2/prompt_relay.py
similarity index 100%
rename from docs/investigations/01_LTX23-audio-file-lipsync/patches/prompt_relay.py
rename to forks/whatdreamscost_koolook/versions/v1_3_2/prompt_relay.py
diff --git a/pyproject.toml b/pyproject.toml
index 43e6b32..8d20d9a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ includes = []
 # "requires-comfyui" = ">=1.0.0"  # ComfyUI version compatibility
 
 [tool.ruff]
-extend-exclude = [".venv", "forks", "upscaler_FIX", "nuke_CAM_exporter", "docs/investigations"]
+extend-exclude = [".venv", "forks", "upscaler_FIX", "nuke_CAM_exporter"]
 
 [tool.setuptools]
 py-modules = [
diff --git a/scripts/sync_investigation_patches.py b/scripts/sync_investigation_patches.py
deleted file mode 100644
index de1c366..0000000
--- a/scripts/sync_investigation_patches.py
+++ /dev/null
@@ -1,182 +0,0 @@
-#!/usr/bin/env python3
-"""sync_investigation_patches.py — push modified upstream files from MAIN to a live install.
-
-Mirrors the `scripts/sync_to_dev.py` pattern but for third-party node modifications
-under `docs/investigations/<NN>_<topic>/patches/`. MAIN is the source of truth;
-the live install is a destination only.
-
-Usage:
-    python scripts/sync_investigation_patches.py <investigation-folder> [--dry-run]
-
-Example:
-    python scripts/sync_investigation_patches.py 01_LTX23-audio-file-lipsync
-
-The investigation folder must contain `upstream.yaml` declaring:
-  - sync_target_env: name of the env var holding the absolute target path
-  - files: list of filenames to copy from patches/ into the target
-
-Errors cleanly when the env var is unset, the target path is missing,
-or upstream.yaml is malformed.
-
-Backup convention: <filename>.bak.<YYYYMMDD> created in the target dir
-before the first overwrite of the day. Subsequent same-day syncs do not
-re-create the backup (preserves the day's earliest pre-sync state).
-"""
-from __future__ import annotations
-
-import argparse
-import datetime as dt
-import os
-import shutil
-import subprocess
-import sys
-from pathlib import Path
-
-import json
-
-REPO_ROOT = Path(__file__).resolve().parent.parent
-INVESTIGATIONS_DIR = REPO_ROOT / "docs" / "investigations"
-
-
-def _load_dotenv() -> None:
-    """Load .env from REPO_ROOT, falling back to the main worktree's .env when
-    REPO_ROOT is itself a git worktree (e.g. running from .claude/worktrees/<name>/).
-    First-set-wins per env-var.
-    """
-    candidates = [REPO_ROOT / ".env"]
-    try:
-        common_dir = subprocess.check_output(
-            ["git", "rev-parse", "--git-common-dir"],
-            cwd=str(REPO_ROOT),
-            text=True,
-            stderr=subprocess.DEVNULL,
-        ).strip()
-        if common_dir:
-            main_root = Path(common_dir).resolve().parent
-            if main_root.resolve() != REPO_ROOT.resolve():
-                candidates.append(main_root / ".env")
-    except (subprocess.CalledProcessError, FileNotFoundError):
-        pass
-
-    for env_path in candidates:
-        if not env_path.is_file():
-            continue
-        for line in env_path.read_text(encoding="utf-8").splitlines():
-            line = line.strip()
-            if not line or line.startswith("#") or "=" not in line:
-                continue
-            key, _, val = line.partition("=")
-            os.environ.setdefault(key.strip(), val.strip().strip('"').strip("'"))
-
-
-def _short_sha(path: Path) -> str:
-    try:
-        out = subprocess.check_output(
-            ["git", "rev-parse", "--short", "HEAD"],
-            cwd=str(path),
-            text=True,
-            stderr=subprocess.DEVNULL,
-        )
-        return out.strip()
-    except (subprocess.CalledProcessError, FileNotFoundError):
-        return "no-git"
-
-
-def _fail(msg: str) -> int:
-    print(f"ERROR: {msg}", file=sys.stderr)
-    return 1
-
-
-def main() -> int:
-    _load_dotenv()
-
-    parser = argparse.ArgumentParser(
-        description="Sync modified upstream files from a Koolook investigation folder to a live ComfyUI install."
-    )
-    parser.add_argument(
-        "folder",
-        help="Investigation folder name under docs/investigations/ (e.g. 01_LTX23-audio-file-lipsync)",
-    )
-    parser.add_argument("--dry-run", action="store_true", help="Preview without copying or backing up")
-    args = parser.parse_args()
-
-    inv_dir = INVESTIGATIONS_DIR / args.folder
-    if not inv_dir.is_dir():
-        return _fail(f"Investigation folder not found: {inv_dir}")
-
-    upstream_json = inv_dir / "upstream.json"
-    if not upstream_json.is_file():
-        return _fail(f"Missing upstream.json in {inv_dir}")
-
-    try:
-        spec = json.loads(upstream_json.read_text(encoding="utf-8"))
-    except json.JSONDecodeError as e:
-        return _fail(f"upstream.json is not valid JSON: {e}")
-
-    if not isinstance(spec, dict):
-        return _fail("upstream.json must be a top-level object")
-
-    env_var = spec.get("sync_target_env")
-    if not env_var:
-        return _fail("upstream.json is missing `sync_target_env`")
-
-    target_root = os.environ.get(env_var)
-    if not target_root:
-        return _fail(f"${env_var} is unset. Add it to .env (see .env.example).")
-
-    target_root_p = Path(target_root)
-    if not target_root_p.is_dir():
-        return _fail(f"Target directory does not exist: {target_root_p}")
-
-    files = spec.get("files") or []
-    if not files:
-        return _fail("upstream.json has no `files` array")
-
-    patches_dir = inv_dir / "patches"
-    if not patches_dir.is_dir():
-        return _fail(f"Missing patches/ directory in {inv_dir}")
-
-    # Two-line header — first line is parsed by chat reports verbatim
-    main_sha = _short_sha(REPO_ROOT)
-    trigger = spec.get("trigger") or args.folder
-    print(f"{main_sha} - {args.folder}")
-    print(f"sync-investigation: {trigger}")
-
-    today = dt.date.today().strftime("%Y%m%d")
-    copied = 0
-    skipped = 0
-
-    for fname in files:
-        src = patches_dir / fname
-        dst = target_root_p / fname
-        if not src.is_file():
-            print(f"  SKIP {fname}: not in patches/")
-            skipped += 1
-            continue
-        if not dst.is_file():
-            print(f"  SKIP {fname}: target does not exist at destination")
-            skipped += 1
-            continue
-
-        bak = dst.with_suffix(dst.suffix + f".bak.{today}")
-        if args.dry_run:
-            print(f"  DRY  {fname} -> {dst}")
-            continue
-
-        if not bak.exists():
-            shutil.copy2(dst, bak)
-
-        shutil.copy2(src, dst)
-        print(f"  OK   {fname} -> {dst}")
-        copied += 1
-
-    if args.dry_run:
-        print(f"(dry-run) would have synced {len(files)} files; skipped {skipped}")
-    else:
-        print(f"synced {copied} files; skipped {skipped}")
-
-    return 0
-
-
-if __name__ == "__main__":
-    sys.exit(main())