sessions/session_20260921_233350_440979/preprocessing/mask-supplier-window-anchor0336-0735: payload batch 1/1

sessions/session_20260921_233350_440979/preprocessing/mask-supplier-window-anchor0336-0735/native/C6A_REVIEW.md

@@ -0,0 +1,33 @@
+# session_20260921_233350_440979: C6a proposal review
+
+**Status: agent proposal; owner mask/window/contact decisions pending.**
+
+Object: bike chain. Motion: two-handed grasp lifting completely off table, lateral shearing cycles, then put down.
+Current packet anchor converted frames: **336–735 inclusive**.
+Current packet endpoint sync timestamps: `1790048067756231182` / `1790048081104138437` ns.
+Participating identities: `hand_A+hand_B`; A is the right, bracelet-wearing hand, B the left.
+Hands mean visible bare forearm through fingertips, excluding bracelet/sleeve. Occluder means the whole visible person, including clothing, accessories and nonparticipating hands.
+
+C1 evidence: `/mnt/data2/magna/belt_perception_shared/phystwin_model_corpus_expansion/lab/session_20260921_233350_440979/window_proposal_c1/proposal.json`.
+
+## Exact own-camera mapping
+
+| Camera | Window-local t | Converted frames | Native container frames | First / last capture timestamp ns |
+|---|---|---|---|---|
+| 12540311 | 0–399 | 336–735 | 337–736 | 1790048067756231182 / 1790048081104138437 |
+| 12933256 | 0–399 | 335–734 | 336–735 | 1790048067761345503 / 1790048081106055971 |
+| 17736741 | 0–399 | 336–735 | 337–736 | 1790048067752017986 / 1790048081098839001 |
+| 23007103 | 0–399 | 335–734 | 336–735 | 1790048067754831101 / 1790048081096883120 |
+
+## Review products
+
+The newest completed media for each view/role currently present are listed below. A correction directory may cover only its changed views/roles; its media_index.json lists the exact coverage. Earlier prompts, propagation runs and media remain on disk. A new correction can make an older media directory historical; use current supplier admission before signoff or downstream processing.
+
+- Views 12540311, 12933256, 17736741, 23007103: [object](/mnt/data2/magna/belt_perception_shared/phystwin_model_corpus_expansion/lab/session_20260921_233350_440979/window_anchor0336-0735/review_media_c6a_recovery1/role_object.mp4), [hand_A](/mnt/data2/magna/belt_perception_shared/phystwin_model_corpus_expansion/lab/session_20260921_233350_440979/window_anchor0336-0735/review_media_c6a_recovery1/role_hand_A.mp4), [hand_B](/mnt/data2/magna/belt_perception_shared/phystwin_model_corpus_expansion/lab/session_20260921_233350_440979/window_anchor0336-0735/review_media_c6a_recovery1/role_hand_B.mp4), [occluder](/mnt/data2/magna/belt_perception_shared/phystwin_model_corpus_expansion/lab/session_20260921_233350_440979/window_anchor0336-0735/review_media_c6a_recovery1/role_occluder.mp4); [start context](/mnt/data2/magna/belt_perception_shared/phystwin_model_corpus_expansion/lab/session_20260921_233350_440979/window_anchor0336-0735/review_media_c6a_recovery1/boundary_start.mp4), [end context](/mnt/data2/magna/belt_perception_shared/phystwin_model_corpus_expansion/lab/session_20260921_233350_440979/window_anchor0336-0735/review_media_c6a_recovery1/boundary_end.mp4).
+- Views 12540311, 17736741: [occluder](/mnt/data2/magna/belt_perception_shared/phystwin_model_corpus_expansion/lab/session_20260921_233350_440979/window_anchor0336-0735/review_media_c6a_sparse_v1/role_occluder.mp4); [start context](/mnt/data2/magna/belt_perception_shared/phystwin_model_corpus_expansion/lab/session_20260921_233350_440979/window_anchor0336-0735/review_media_c6a_sparse_v1/boundary_start.mp4), [end context](/mnt/data2/magna/belt_perception_shared/phystwin_model_corpus_expansion/lab/session_20260921_233350_440979/window_anchor0336-0735/review_media_c6a_sparse_v1/boundary_end.mp4).
+
+## Decisions and downstream boundary
+
+This card records the decisions above and grants no additional stage. Actual owner mask/window decisions must be recorded before final tracking. The three pushes also require an explicit decision about the fixed material-attachment approximation. After prompt corrections, perform fresh current-input admission; an old fitting identity alone does not detect every C1 F3 correction.
+
+C6a review findings and decisions are collected under `lab/c6a_20261027/`; source C1 records and protected A/B inputs remain unchanged.

sessions/session_20260921_233350_440979/preprocessing/mask-supplier-window-anchor0336-0735/native/annotations/prompts/12540311/hand_A/t0000_v01.json

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+{
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+    "frame_association_mode": "per_camera_native_range"
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+  "serial": "12540311",
+  "view_index": 0,
+  "instance": "hand_A",
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+  "source": "agent:c6a_20261027",
+  "note": "Agent draft only; RIGHT bracelet hand at near/bottom strand: bare forearm, hand and fingers; exclude bracelet, sleeve, chain and left hand_B.",
+  "seed_mask_file": "t0000_v01_seed_mask.npz",
+  "seed_mask_sha256": "bd4aecbc0f32d4b099d0c1a17e565bee767d3cb6e0fcebe20ffa32ef11151e9d",
+  "seed_mask_pixels": 28733,
+  "seed_model": {
+    "predictor": "sam2_video_predictor",
+    "config": "configs/sam2.1/sam2.1_hiera_l.yaml",
+    "config_file": "/mnt/data0/magna/belt_perception_wt_c6a_lab_input_preparation_20261027/segment-anything-2/sam2/configs/sam2.1/sam2.1_hiera_l.yaml",
+    "checkpoint": "/mnt/data2/magna/belt_perception/third_party/phystwin_external/checkpoints/sam2.1_hiera_large.pt",
+    "checkpoint_sha256": "2647878d5dfa5098f2f8649825738a9345572bae2d4350a2468587ece47dd318",
+    "sam2_package": "/mnt/data0/magna/belt_perception_wt_c6a_lab_input_preparation_20261027/segment-anything-2/sam2",
+    "sam2_git": {
+      "commit": "969dad578a42d4c75624f87821497d37aabfbe99",
+      "clean": true
+    },
+    "build": "build_sam2_video_predictor(apply_postprocessing=True)",
+    "fill_hole_area": 0,
+    "binarize_mask_from_pts_for_mem_enc": true,
+    "non_overlap_masks": false,
+    "image_size": 1024,
+    "frame_preprocessing": "decoded native RGB, PIL default resize to image_size^2, /255, ImageNet mean/std (no JPEG)",
+    "coordinate_normalization": "native (u, v) / (W, H) * image_size (normalize_coords=True)",
+    "mask_logit_threshold": 0.0,
+    "autocast": "bfloat16",
+    "tf32": true,
+    "device": "cuda",
+    "torch": "2.11.0+cu128"
+  },
+  "created_utc": "2026-10-27T19:42:05Z"
+}

sessions/session_20260921_233350_440979/preprocessing/mask-supplier-window-anchor0336-0735/native/annotations/prompts/12540311/hand_A/t0000_v01_seed_mask.npz

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sessions/session_20260921_233350_440979/preprocessing/mask-supplier-window-anchor0336-0735/native/annotations/prompts/12540311/hand_B/t0000_v01.json

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+    "checkpoint": "/mnt/data2/magna/belt_perception/third_party/phystwin_external/checkpoints/sam2.1_hiera_large.pt",
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sessions/session_20260921_233350_440979/preprocessing/mask-supplier-window-anchor0336-0735/native/annotations/prompts/12540311/hand_B/t0000_v01_seed_mask.npz

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sessions/session_20260921_233350_440979/preprocessing/mask-supplier-window-anchor0336-0735/native/annotations/prompts/12540311/object/t0000_v01.json

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