[misc] cosmos3 PORT_STATUS: framework-reference pivot + Phase 1 findings

tests/local_tests/cosmos3/PORT_STATUS.md

@@ -13,7 +13,7 @@
 
 ## Current Phase
 
-- phase: `rebased onto origin/main; ready for Phase 1 reference study + repoint to official diffusers`
+- phase: `Phase 1 done (reference = cosmos_framework, full omni); feasibility = framework runnable for component parity with light deps`
 - status: `in_progress`
 - owner: `orchestrator`
 - last_updated: `2026-06-06`
@@ -79,6 +79,7 @@
 | 2026-06-06 | Scope = full omni (video + audio + reasoning + action) | User choice (revised from branch's original video-only scope) | Adds `vision_encoder`, `sound_tokenizer` ports + `WorkloadType` AV + audio metric |
 | 2026-06-06 | Downloaded full 34.9 GB (33 GiB) `nvidia/Cosmos3-Nano` | Unblocks May-22 `PENDING` weight status (HF was 401, now public) | Real parity now possible |
 | 2026-06-06 | Rebased branch onto origin/main (33 commits); resolved registry.py conflict by reconstructing from main + cosmos3 import/entry | Branch was stale; fastvideo failed to import (main removed MatrixGameI2V480PConfig) | Branch imports clean; Tier-A 13 passed/2 skipped |
+| 2026-06-06 | Reference = cosmos_framework ONLY (full omni); diffusers shim dropped even for video | User directive (Phase 1 found diffusers __call__ is video-only; sound/action/reasoning live only in the framework) | Larger port; ref DiT = `Cosmos3VFMNetwork`/`Cosmos3VFMNetworkConfig` (not diffusers `Cosmos3OmniTransformer`); core model imports in fv-cosmos3 with light deps; TE only in optional dot_product_attention |
 
 ## Handoff Notes