docs(physics): close Slice I evidence and roadmap

Record the accepted flat-authoritative collision cutover, production parsed-graph removal, exact rollbacks, zero-residency connected gates, and RDP measurement boundary. Reconcile architecture, milestones, roadmap, issue ledger, agent instructions, and the active Slice J handoff.

Validated by the existing zero-warning Release build, 8,413 passing Release tests with five pre-existing skips, 201 focused closeout tests, and both exact-binary connected routes.

Co-authored-by: Codex <codex@openai.com>

docs/plans/2026-07-25-modern-runtime-slice-i.md

@@ -1,10 +1,10 @@
 # Modern runtime Slice I — flat collision assets and zero-allocation physics
 
-**Status:** I0-I5 COMPLETE - retail oracle, zero-allocation transition
+**Status:** I0–I7 COMPLETE — retail oracle, zero-allocation transition
 scratch, deterministic immutable collision records, complete prepared
-package, exact flat traversal, dual publication, and connected shadow gate;
-I6 production cutover, strict connected gate, and physical nine-stop soak
-complete; user collision/visual acceptance active before graph deletion
+package, exact flat traversal, dual publication, flat-authoritative production
+cutover, parsed-graph removal, connected correctness/lifetime acceptance, and
+documentation closeout
 **Parent:** `2026-07-24-modern-runtime-architecture.md`, Slice I
 **Purpose:** remove parsed DAT object graphs and steady collision allocations
 without changing one retail collision decision, float, comparison, or traversal
@@ -290,7 +290,20 @@ no automation oracle) sustained roughly 190–200 FPS with stable CPU p50
 ~5.0 ms / p95 ~5.9–7.3 ms and GPU p95 ~2.1 ms. Evidence:
 [`../research/2026-07-25-slice-i6-flat-production-cutover.md`](../research/2026-07-25-slice-i6-flat-production-cutover.md).
 
-Parsed-graph removal remains gated on the user correctness/visual pass.
+The user accepted the connected collision gate on 2026-07-25. Production
+parsed-graph removal then landed at
+`82f8d4f82e24ad85042ac3e25c4f6464bebce758`. The production
+`PhysicsDataCache`, stable `GpuWorldState`, near-build payloads, and live
+publication path now retain only immutable flat assets. Graph construction
+survives solely in explicit tests, bake/equivalence tools, and source-oracle
+constructors. The exact rollback for graph removal is:
+
+```text
+git revert 82f8d4f82e24ad85042ac3e25c4f6464bebce758
+```
+
+Do not revert I3–I6 unless evidence implicates the prepared package or
+flat-authoritative traversal itself.
 
 ### I7 — allocation, soak, and documentation closeout
 
@@ -314,6 +327,22 @@ Final gate:
 - connected portal/reconnect/interaction routes pass;
 - exact cutover rollback recorded before user verification.
 
+**Completed 2026-07-25.** Release build and the complete solution pass
+8,413 tests / 5 skips. The focused collision/door/doorway/cellar/ramp/jump/
+projectile/allocation gate passes 154 Core tests plus 47 App camera/projectile
+tests; player, grounded publication, remote, projectile, and camera resolves
+remain 0 B/resolve.
+
+The exact-binary connected lifecycle/reconnect route and canonical nine-stop
+R6 soak both pass with graceful exits. Every stable checkpoint reports
+`0/0/0` retained parsed GfxObj/Setup/cell graphs while flat GfxObj/Setup/cell
+residency remains populated. Movement, jump, combat, projectile, portal,
+dungeon, revisit, reconnect, publication, retirement, and teardown checks
+pass. The user accepted collision behavior over RDP. Absolute post-removal
+GPU/frame-time and ordinary-process memory comparison remains a physical-
+display measurement, not a Slice-I correctness blocker. Evidence:
+[`../research/2026-07-25-slice-i7-closeout.md`](../research/2026-07-25-slice-i7-closeout.md).
+
 ## 4. Commit order
 
 Each unit is independently buildable and reversible: