docs/SANITY_CHECKS_AND_LEAKAGE_GUARDS.md

Sanity checks and leakage guards

This file is intentionally aligned with docs/QA_AND_LEAKAGE.md for GWAM_Data v1.2 sparse-v2.

Normative current shapes:

node_state: float32[T, 256, 32]
view evidence + RLE masks: sparse visible node/view pairs
dynamic_edges: sparse JSONL contact + visibility_change
Phase 2: sparse visible-only feature files plus phase2_summary.json

Historical/stale shapes that must not be used for v1.2 sparse-v2 loaders:

317-D / 323-D node_feats
dense rel_state / rel_prior
dense visual_views
distractor family id 1
state_on/state_off events.jsonl vocab

Minimum package gate:

1. _PHASE1_DONE.json for every packaged episode.
2. audit/phase2_summary.json for every packaged Phase 2 episode.
3. No invisible Phase 2 features.
4. Phase 2 pairs partition Phase 1 visible pairs.
5. No NaN/Inf in node_state.
6. Padded rows all-zero; loaders gate on active channel.
7. Goal/instruction/object-role fields remain supervision-only.
8. Known drop target/OpenDrawer/episode_000459 documented and not packaged as a half episode.