Finish bounded lighting-observer cleanup and record verification

docs/research/2026-09-01-overhaul/478-observer-removal-contract.md

@@ -1,6 +1,8 @@
 # #478 temporary lighting observer removal
 
-ACTIVE after candidatea5debaca2: unchanged Town High/off/High and0125/8C04
+IMPLEMENTED and lead-reviewed at scratch ed2c8b12c; integration's fresh Release
+and final graphical repeat are pending. See `478-observer-removal-verification.md`.
+Activated after candidatea5debaca2: unchanged Town High/off/High and0125/8C04
 control PNGs inspected, eight provisional lighting/reveal PASS frames,
 `478-repaired-lighting-graphical.md`. Both own clients exited0/gracefully.
 This is not owner acceptance. A failed final visual check returns to

docs/research/2026-09-01-overhaul/478-observer-removal-verification.md

@@ -0,0 +1,51 @@
+# #478 observer removal — lead verification
+
+The eight candidate PNGs at `a5debaca2` passed the narrow lighting/reveal
+smoke provisionally (`478-repaired-lighting-graphical.md`). Under
+`478-observer-removal-contract.md`, OpenAI James removed only the temporary
+observer and its corresponding tests. Lead committed scratch
+`ed2c8b12c1ecd31dbc0069419db8104ed0e2bd49`, base `1772c1a5a`, and verified
+the six retained integration blobs against that commit; the seventh path is
+the deleted `EnvCellRenderer.LightingObservation.cs`.
+
+## Scope review
+
+Exactly seven paths, 1 insertion / 581 deletions. No lighting selection,
+ambient, shader, generated module, package, geometry or FPS changes. Four
+composition/DTO/test files restore the exact pre-observer (`59b0b6e72^`) Git
+blobs; snapshot-source restoration differs only by one blank line. Remaining
+EnvCell test changes remove only observer tests and unused helpers/imports.
+The permanent two-cell 47-index RHI upload and next-generation overwrite test,
+its required helpers, ordinary 8-index upload and both compiled shader pixel
+witnesses remain. Observer symbol search over `src` and `tests` returns none.
+Unrelated lifecycle and current-render-scene checkpoint evidence remains.
+
+Lead checked the complete diff and all six raw source hashes against the
+frozen implementer return. No new retail algorithm or deviation is introduced;
+the preceding independent retail and production/ABI reviews still cover the
+unchanged repair. No additional retail re-port or review round was needed.
+The removed temporary source remains recoverable from Git history.
+
+## Verification before integration
+
+Artifacts under scratch `s5-478-observer-cleanup/artifacts/478-observer-cleanup/`:
+
+- `release-build-r2/console.log`: full solution Release, 0 warnings/errors.
+  First build caught a removed Wb import also needed by `GpuMemoryTracker`;
+  that import was restored before the final build and freeze.
+- `app-focused/app-focused.trx`: 180/180 affected/permanent tests.
+- `core-lighting/core-lighting.trx`: 69/69, including installed Town DAT.
+- `shader-pixels/shader-pixels.trx`: both committed-module witnesses pass.
+- Lead independent `root-removal/root-removal.trx`: 106/106 affected
+  lifecycle/composition/EnvCell/ordinary-upload tests plus both native pixels.
+
+Lead inspected actual build output and all TRX counters. Both client names
+were absent before the independent execution. These are focused correctness
+tests, not the full solution test lane or an FPS benchmark.
+
+## Final graphical gate
+
+Pending fresh Release on the integrated observer-free commit and the unchanged
+Town High/off/High plus 0125/8C04/Holtburg control routes. Candidate consumed-
+light measurements remain evidence only for `a5debaca2`, not for this binary.
+Owner acceptance remains owed; G4 FAIL/unpassed, no main merge. FPS deferred.

docs/research/2026-09-01-overhaul/s5-consumers-material-closeout-packet.md

@@ -4982,3 +4982,11 @@ requested but its live module check missed the already-exited process; no
 stronger claim. `478-repaired-lighting-graphical.md` seals paths/hashes/limits.
 Observer removal contract activated; final observer-free re-gate still owed.
 No FPS work, no owner acceptance, G4FAIL/no main merge.
+
+Observer cleanup reviewed and integrated from scratch `ed2c8b12c`: exactly
+seven paths, temporary capture/DTO/wiring and observer-only tests removed.
+Permanent RHI47/ordinary8/native-pixel coverage retained; six retained blobs
+match. Full scratch Release0W0E, App180/Core69/native2 PASS; lead independent
+affected/native106/106. `478-observer-removal-verification.md` records scope
+and actual reports. No new deviation, retail algorithm or FPS edit. Fresh
+integrated Release and unchanged final graphical repeats remain next.