docs(runtime): record J7 root cutover gates

Capture the exact production rollback, complete automated evidence, connected route results, and the still-active physical-display acceptance without declaring J7 closed early.

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

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

@@ -384,6 +384,17 @@ mid-portal disconnect traces match; the graphical screenshots remain accepted.
 
 ### J7 — one `GameRuntime` composition root
 
+J7.1 completed at `96ddd165`; J7.2/J7.3 completed at
+`ce41efb9e5938f79a7580476b949d172f52a1e69`. Production now owns one
+`GameRuntime`, App borrows its children, and shutdown is one ordered root
+transaction. All focused, complete Release, exact-binary lifecycle/reconnect,
+and canonical nine-stop automated gates pass. The physical-display visual gate
+is active; J7 remains open until the user accepts radar, paperdoll,
+Use/approach, combat facing, and both recall paths. Detailed evidence:
+[`2026-07-26-modern-runtime-slice-j7.md`](2026-07-26-modern-runtime-slice-j7.md)
+and
+[`../research/2026-07-26-slice-j7-game-runtime-root-cutover.md`](../research/2026-07-26-slice-j7-game-runtime-root-cutover.md).
+
 - Compose all moved lifetime groups into one instance-scoped `GameRuntime`.
 - Make `GameWindow`/App own exactly one Runtime instance plus presentation
   adapters.
@@ -395,6 +406,12 @@ mid-portal disconnect traces match; the graphical screenshots remain accepted.
 Gate: graphical connected lifecycle/resource routes pass with no mirrored
 state, no extra update latency, and no performance regression.
 
+Exact J7.2/J7.3 rollback:
+
+```text
+git revert ce41efb9e5938f79a7580476b949d172f52a1e69
+```
+
 ### J8 — no-window integration and Slice J closeout
 
 - Build a transport/content test host that constructs Runtime directly.