Add causal oracle person information screen

PROJECT_CONTEXT.md

@@ -52,7 +52,7 @@ result.
   matched improvement over the historical no-dev pooled result; correct/wrong
   visual controls remain missing.
 
-### Implemented, awaiting remote runtime verification
+### Measured local-fusion screens
 
 - Two current-sidecar screening controls: `audio-person-frame-set` adds a
   zero-gated audio-to-person read before the F1 query, and
@@ -62,10 +62,15 @@ result.
 - `track-gru-residual` builds strictly causal histories from anonymous provided
   track IDs, applies one shared GRU per track, lets G+A query current track
   states, and adds a zero-gated correction to an exactly initialized pooled
-  `G+A+V` checkpoint. Its three focused loader/head/CLI round-trip tests passed
-  on the remote PyTorch/L20 environment on 2026-09-07; the one-session GPU
-  smoke and measured experiment are still pending. See
-  [`docs/easycom_track_gru_residual.md`](docs/easycom_track_gru_residual.md).
+  `G+A+V` checkpoint. The matched Session-12 three-seed screen was null
+  (`+0.01306 +/- 0.02368` percentage points in ten-horizon mean mAP). A seed-0
+  Sessions-1--3 audit reproduced pooled predictions to within `-0.00030`
+  points. Saved residual gates were only `-0.0015` to `+0.0108`; because a zero
+  scalar gate also blocks the initial branch gradient, this is recorded as an
+  optimization failure rather than evidence that track continuity is useless.
+  See the immutable
+  [`result record`](results/easycom_track_gru_residual_4ep_2026-09-07/README.md)
+  and [`implementation note`](docs/easycom_track_gru_residual.md).
 
 ### Current blocker
 
@@ -89,9 +94,10 @@ diagnostics until competing-risk censoring is fixed.
 2. **P1:** probe aggregate activity and per-person active-speaker grounding;
    compare correct, wrong-person and time-shifted visual inputs.
 3. **P2:** re-evaluate `G`, `G+A`, `G+A+pooled-V` under the frozen event protocol.
-4. **P3:** run the matched pooled/anonymous-track-GRU residual screen, then add
-   broken-ID, wrong-time and remove-person controls before claiming that track
-   continuity matters.
+4. **P3:** repair the matched anonymous-track-GRU residual optimization by
+   replacing the scalar zero gate with a zero-initialized residual output
+   layer, and verify nonzero branch gradients on Session 12. Add broken-ID,
+   wrong-time and remove-person controls only if that corrected screen improves.
 5. **P4:** attempt person-memory adapter/Thinker LoRA only if P1/P3 pass.
 
 The detailed architecture, controls and stopping gates for P3 are frozen in
@@ -228,6 +234,7 @@ Do not reorganize them physically without compatibility wrappers.
 | `derive_easycom_interaction_events.py` | Deterministic transcript/timing proxies |
 | `adjudicate_easycom_interaction_events.py` | Optional ambiguous-event adjudication |
 | `audit_easycom_floor_events.py` | Count EOT/takeover/backchannel candidates |
+| `prepare_easycom_oracle_features.py` | Build explicit past-only oracle person-activity sidecars for information-value screening |
 
 ### Local features
 
@@ -245,6 +252,7 @@ Do not reorganize them physically without compatibility wrappers.
 | `evaluate_floor_state_changes.py` | CPU floor-state/event proxy evaluation |
 | `summarize_local_baselines.py` | Aggregate local baseline `metrics.json` files |
 | `run_easycom_track_gru_residual.sh` | Matched pooled and anonymous track-GRU training/inference launcher |
+| `run_easycom_oracle_information.sh` | Prepare and screen aggregate/per-person/shuffled/delayed oracle conditions on Session 12 |
 | `train_omni_turn_lora.py` | Thinker LoRA training from cached AV |
 | `eval_omni_turn_lora.py` | Thinker LoRA evaluation |