docs(runtime): close gameplay-state ownership

Record J4.5 canonical shortcut and spellbook command ownership, combined failure and graphical/headless parity evidence, the 8,544-test Release gate, exact-binary lifecycle and nine-stop acceptance, rollback instructions, and the J5 boundary.

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

docs/plans/2026-07-24-modern-runtime-architecture.md

@@ -14,8 +14,9 @@ hosts and closed the failure-safe owner ledger. J4.1 moved communication and
 social ownership into Runtime at `c9d25ade`; J4.2 moved inventory transaction
 ownership into Runtime at `011efbea`; J4.3 moved the coupled magic/player-sheet
 owner into Runtime at `d02a12ce`; J4.4 moved character settings/projections
-and the shared typed state-command seam at `dcb61efb`; J4.5 combined closeout
-is the active execution point.
+and the shared typed state-command seam at `dcb61efb`; J4.5 closed canonical
+gameplay-state ownership at `89e6b207`. J5 movement, physics, interaction,
+and combat ownership is the active execution point.
 
 **Scope:** Reconcile and sequence the existing Modern Pipeline (`MP`) and
 Linux/headless (`LH`) tracks using the 2026-07-24 connected performance audit.
@@ -1268,8 +1269,12 @@ before fallible callbacks, serializes re-entrant observation within the
 committing call, protects every accepted channel by mutation version, and
 requires reset/direct disposal to converge the complete ownership ledger to
 zero. Its 8,484-test / 5-skip Release suite, exact-binary lifecycle/reconnect
-gate, and canonical nine-stop route pass. J4 gameplay-state lifetime groups
-are the current execution point.
+gate, and canonical nine-stop route pass. J4 is complete at `89e6b207`: the
+single Runtime shortcut/spellbook/inventory owners, graphical/no-window
+command parity, failure-safe combined ledger, 8,544-test Release suite,
+exact-binary lifecycle/reconnect gate, and canonical nine-stop route pass.
+J5 movement/physics/interaction/combat ownership is the current execution
+point.
 Evidence:
 [`../research/2026-07-25-slice-g5-production-profile.md`](../research/2026-07-25-slice-g5-production-profile.md)
 and
@@ -1303,7 +1308,7 @@ honest metrics + committed baselines        (A — exit criteria block C)
   -> delta GPU submission                   (G)
   -> residual frame cleanup                 (H-a, H-b, H-c)
   -> flat collision assets                  (I — COMPLETE)
-  -> presentation-independent runtime       (J — CURRENT at J4)
+  -> presentation-independent runtime       (J — CURRENT at J5)
   -> Linux/headless/multi-session           (K)
   -> evidence-gated GPU jobs                (L)
 ```