docs(architecture): record GameWindow automated closeout

Reconcile the architecture, roadmap, milestones, issue ledger, session instructions, and durable memory with the 1,622-line native shell, canonical soak evidence, connected framebuffer comparison, and sole remaining user visual gate.

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

docs/plans/2026-07-22-gamewindow-slice-8-checkpoint-l-closeout.md

@@ -1,14 +1,15 @@
 # GameWindow Slice 8 Checkpoint L — campaign closeout
 
-**Status:** Active 2026-07-22.  
+**Status:** Automated closeout complete 2026-07-22; final user visual matrix
+pending.
 **Parent:**
 [`2026-07-22-gamewindow-slice-8-composition-lifecycle.md`](2026-07-22-gamewindow-slice-8-composition-lifecycle.md),
-Checkpoint L.  
+Checkpoint L.
 **Integrated baseline:** `6c5e0604`; Checkpoints A–K are implemented.
 `GameWindow.cs` is 1,622 raw lines, App Release passes 3,451 tests / 3
 intentional skips, and the complete Release suite passes 7,823 tests / 5
 intentional skips. Two fresh-process canonical nine-stop soaks pass with
-graceful exits and the unchanged residency/performance limits.  
+graceful exits and the unchanged residency/performance limits.
 **Behavior rule:** L proves and records the shipped ownership state. It may
 correct documentation, test/gate coverage, or a defect demonstrated by the
 audit, but it does not add gameplay, alter retail behavior, loosen a gate, or
@@ -124,3 +125,36 @@ spellbook panel; outdoor/building/dungeon/portal/paperdoll/particle/alpha
 presentation; graceful close and fresh reconnect. Only that confirmation marks
 L and the overall structural campaign complete.
 
+## 5. Automated closeout evidence
+
+- The final host is 1,622 raw lines. Source-boundary inspection finds no AC
+  algorithm, packet builder, entity scan, render graph, animation-part
+  composer, or stored `GameWindow` back-reference in an extracted owner.
+- All 293 focused Slice 8 ownership, composition, callback, frame, lifetime,
+  automation, and source-boundary tests pass. App Release passes 3,451 tests / 3
+  intentional skips; the complete Release suite passes 7,823 / 5. The build's
+  17 test-project warnings are the unchanged #228 set.
+- The connected lifecycle/reconnect gate passed in 314.4 seconds with graceful
+  capped and uncapped exits. Its uncapped reconnect reached 174.74 FPS / 5.72
+  ms at the final checkpoint. All six PNG artifacts are valid; the only route
+  warning is the expected 25 world-edge empty-landblock misses.
+- Both Checkpoint-K nine-stop reports passed in about 403 seconds, produced the
+  exact names/sequences/process identity, and found no unconfounded canonical
+  owner growth under the unchanged residency/performance limits.
+- The six current lifecycle PNGs were compared against artifacts rebuilt from
+  exact accepted Slice 7 commit `9d7df1bf` in an isolated worktree. The five
+  deterministic destinations preserve geometry, UI/paperdoll layering,
+  private viewports, depth/alpha, and world reveal. Facility Hub was nearly
+  pixel-identical (mean absolute RGB delta 0.91/255); the Aerlinthe captures
+  were 3.42 and 3.87/255. Holtburg and reconnect differences are live
+  entities, particles, vitals, and sub-frame camera timing. Capped login used a
+  different server-saved location and was checked only for complete rendering
+  and presentation layering.
+- Three corrected-diff reviews are clean: behavior/retail boundary,
+  architecture/ownership, and adversarial lifecycle/failure handling. The
+  divergence audit found no new runtime behavior in K or L and requires no
+  register change.
+
+The generated reports, screenshots, and disposable baseline worktree are
+untracked evidence. The user's unrelated `TransitionTypes.cs` edit was not
+modified or staged.