docs(rendering): close slice G1 candidate gate

docs/research/2026-07-25-slice-g1-scene-query-candidate-gate.md

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+# Slice G1 Scene-Query Candidate Gate
+
+**Date:** 2026-07-25
+
+**Candidate:** `e346f8bbaf5c6d73498d74da32bfc37caf8c4e44`
+
+**Result:** accepted; G1 complete
+
+## Purpose
+
+G1 builds the exact current render frame's candidate routes from the
+incremental render scene instead of walking `LandblockEntries`. It remains a
+compare-only source: production still draws the accepted
+`InteriorEntityPartition`/`WorldEntity` path.
+
+The comparison preserves route, route index, cell, duplicate membership, and
+projection identity. Sorting is allowed only within those dimensions so
+unordered retained scene indices cannot create a false mismatch while PView
+order and route multiplicity remain exact.
+
+## Exact physical evidence
+
+| Route | Report | Final comparisons | Mismatch | Candidate parity | Exit |
+|---|---|---:|---:|---|---|
+| Capped nine-stop | `logs/connected-r6-soak-20260725-001333.report.json` | 29,392 / 29,392 | 0 | exact at all nine checkpoints | graceful |
+| Uncapped nine-stop | `logs/connected-r6-soak-20260725-002328.report.json` | 29,025 / 29,025 | 0 | exact at all nine checkpoints | graceful |
+| Uncapped dense Arwic | `logs/connected-dense-town-20260725-003231.report.json` | 1,522 / 1,522 | 0 | 4,274 / 4,274 at checkpoint | graceful |
+
+Every route reported:
+
+- `Passed=true`, `ExitCode=0`, and `GracefulExit=true`;
+- source commit, embedded binary commit, and candidate commit equal to
+  `e346f8bbaf5c6d73498d74da32bfc37caf8c4e44`;
+- product and current PView frame sequences equal;
+- expected and actual candidate count equal;
+- expected and actual candidate digest equal;
+- `firstMismatch=null`.
+
+The nine-stop routes covered Caul, Sawato, Rynthid, Aerlinthe, Holtburg,
+same-location Sawato revisit, Caul return, Sawato plateau, and Caul plateau.
+They exercised outdoor and interior roots, door/outside routes, nested
+building look-ins, non-flooded retained cell data, portal transitions,
+equipped children, movement, jump, combat, generation replacement, and
+graceful logout. Dense Arwic exercised 15,530 resident world entities and 111
+active animated statics during its stationary turn sample.
+
+## Deterministic gate
+
+- 24 focused current-oracle, shadow-scene, frame-product, and G1 route tests;
+- 3,745 App tests / 3 skips;
+- 8,229 complete-solution tests / 5 skips;
+- exact hidden-spatial versus portal-withdrawn candidate behavior;
+- EnvCell shell projections excluded from object routes;
+- exact mismatch reporting after a retained projection is removed.
+
+## Rollback
+
+G1 does not change the production draw source. Commit `e346f8bb` is safe to
+retain if a later visual cutover is reverted. The exact pre-cutover runtime
+rollback anchor remains `e7d9d6fa`. G4 must record its own cutover commit
+before connected visual verification.