refactor(app): compose session and player startup

Move streaming, live-session, hydration, local-player, combat, and teleport construction behind the typed Phase-7 boundary. Add exact-owner runtime bindings and focused spawn-claim classification so partial startup rolls back without retaining old session targets while preserving the accepted construction and frame dependencies.

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

docs/ISSUES.md

@@ -27,13 +27,14 @@ What does NOT go here:
 ## Current queue — 2026-07-22
 
 - **Active structural work:** `GameWindow` decomposition. Slices 1–7 and Slice
-  8 checkpoints A–H are complete; I.1–I.6 now own the executable ordered
+  8 checkpoints A–H are complete; I.1–I.7 now own the executable ordered
   startup path through retained UI and live presentation, including the
   canonical runtime/world, selection/radar, landblock publishers, and
   portal/sky/particle resources.
-  `GameWindow.OnUpdate` and `GameWindow.OnRender` are typed orchestration
-  handoffs and the class is 2,840 raw lines. I.7–I.9 plus the remaining
-  shutdown/closeout
+  I.7 now owns streaming/session/hydration/local-player/teleport startup and
+  every late edge explicitly. `GameWindow.OnUpdate` and `GameWindow.OnRender`
+  are typed orchestration handoffs and the class is 2,479 raw lines. I.8–I.9
+  plus the remaining shutdown/closeout
   cleanup is active in
   [`docs/architecture/code-structure.md`](architecture/code-structure.md).
   This is the behavior-preserving prerequisite before new M4 feature bodies.

docs/architecture/code-structure.md

@@ -731,11 +731,14 @@ retained UI, live presentation, and landblock publication into ordered
 composition phases. Typed exact-owner sources bridge later session,
 selection, radar, view-plane, diagnostics, inventory, hydration, and automation
 owners without callbacks to the window. The old item-use and selection wrapper
-methods are deleted. `GameWindow` is 2,840 raw lines after I.6. I.7–L remain
-active, with session, streaming, and hydration composition next. The App gate
-passes 3,407 tests / 3 intentional skips and the complete Release suite passes
-7,779 tests / 5 intentional skips. The clean solution build retains only the
-17 test-project warnings tracked by #228; the I.6 behavior, architecture, and
+methods are deleted. I.7 now owns the complete streaming/session/hydration/
+local-player/teleport construction phase and every late edge through named
+exact-owner tokens; the former 432-line inline body and spawn-claim memo are
+gone. `GameWindow` is 2,479 raw lines after I.7. I.8–L remain active, with
+atomic frame-root publication and terminal session start next. The App gate
+passes 3,420 tests / 3 intentional skips and the complete Release suite passes
+7,792 tests / 5 intentional skips. The clean solution build retains only the
+17 test-project warnings tracked by #228; the I.7 behavior, architecture, and
 adversarial reviews are clean.
 
 ### 4.4 Exit criteria

docs/plans/2026-04-11-roadmap.md

@@ -97,15 +97,17 @@ runtime-target binding without replay, and one current/toon settings owner.
 `GameWindow` is 3,663 lines / 162 fields / 37 methods at G. Checkpoint H adds
 sole terrain-atlas and sky-shader roots, one retained Host/runtime lease, an
 atomic update/render frame-root pair, prepared portal fallback/transfer, and
-checked retryable GL leaf construction and state mutation. Checkpoint I.1–I.6
+checked retryable GL leaf construction and state mutation. Checkpoint I.1–I.7
 now provide the executable ordered startup pipeline through retained UI and
 live presentation. The canonical live runtime/world, presentation/effect
 controllers, selection/radar, landblock publishers, and portal/sky/particle
 resources have transactional phase ownership and exact-owner late bindings.
-`GameWindow` is now 2,840 raw lines. I.7–I.9, shutdown, canonical soak
-snapshots, and closeout checkpoints J–L remain. The App gate passes 3,407 tests
-/ 3 intentional skips, the complete Release suite passes 7,779 tests / 5
-skips, and all three I.6 corrected-diff reviews are clean.
+I.7 adds the complete streaming/session/hydration/local-player/teleport phase,
+including explicit reversible ownership for every late edge. `GameWindow` is
+now 2,479 raw lines. I.8–I.9, shutdown, canonical soak snapshots, and closeout
+checkpoints J–L remain. The App gate passes 3,420 tests / 3 intentional skips,
+the complete Release suite passes 7,792 tests / 5 skips, and all three I.7
+corrected-diff reviews are clean.
 
 This is a behavior-preserving structural program. Severe regressions still get
 root-cause fixes in separate commits; ordinary feature work resumes with M4

docs/plans/2026-05-12-milestones.md

@@ -53,15 +53,17 @@ startup application, and inert late target binding. `GameWindow` is 3,663
 lines / 162 fields / 37 methods at G. Checkpoint H adds sole terrain/sky
 resource roots, one retained Host/runtime lease, an atomic update/render root
 pair, a prepared portal fallback/transfer transaction, and checked retryable GL
-leaf construction. Checkpoint I.1–I.6 now provide the executable ordered
+leaf construction. Checkpoint I.1–I.7 now provide the executable ordered
 startup pipeline through retained UI and live presentation. The canonical live
 runtime/world, presentation/effect controllers, selection/radar, landblock
 publishers, and portal/sky/particle resources have transactional phase
-ownership and exact-owner late bindings. `GameWindow` is 2,840 raw lines.
-I.7–I.9 and checkpoints J–L remain active. Issue #232 tracks process-residency
-variance in the soak without loosening its leak threshold. The App gate passes
-3,407 tests / 3 skips, the complete Release suite passes 7,779 tests / 5 skips,
-and all three I.6 corrected-diff reviews are clean.
+ownership and exact-owner late bindings. I.7 now owns the complete streaming,
+session, hydration, local-player, combat, and teleport startup graph, including
+named reversible late edges. `GameWindow` is 2,479 raw lines. I.8–I.9 and
+checkpoints J–L remain active. Issue #232 tracks process-residency variance in
+the soak without loosening its leak threshold. The App gate passes 3,420 tests
+/ 3 skips, the complete Release suite passes 7,792 tests / 5 skips, and all
+three I.7 corrected-diff reviews are clean.
 
 Carried:
 #153 far-teleport residual, #116 slide-response, the remaining R6 ownership cleanup plus

docs/plans/2026-07-22-gamewindow-slice-8-checkpoint-i-ordered-composition.md

@@ -281,9 +281,16 @@ ledger only after the complete pipeline is live.
   under the same ownership contract. `GameWindow.cs` is 2,840 raw lines; the
   App gate passes 3,407 tests / 3 intentional skips and the complete Release
   suite passes 7,779 tests / 5 intentional skips. I.7 session, streaming, and
-  hydration composition is the active cut; its ownership, rollback, and gate
+  hydration composition is complete; its ownership, rollback, and gate
   contract is
   [`2026-07-22-gamewindow-slice-8-checkpoint-i7-session-player.md`](2026-07-22-gamewindow-slice-8-checkpoint-i7-session-player.md).
+- I.7 removes the former 432-line Phase-7 body. Streaming, session, hydration,
+  local-player, combat, and teleport startup now compose through one typed
+  result; all late edges have named reversible exact-owner tokens. The
+  spawn-claim DAT range memo has a focused owner. `GameWindow.cs` is 2,479 raw
+  lines. App Release passes 3,420 tests / 3 skips; the complete Release suite
+  passes 7,792 tests / 5 skips with the same 17 warnings tracked by #228. I.8
+  frame-root publication and terminal session start is the active cut.
   Checkpoint I remains active until I.9 closes the complete nine-phase pipeline.
 
 ## 6. Automated acceptance

docs/plans/2026-07-22-gamewindow-slice-8-checkpoint-i7-session-player.md

@@ -1,6 +1,6 @@
 # GameWindow Slice 8 — Checkpoint I.7 Session and Player Composition
 
-**Status:** Active
+**Status:** Complete 2026-07-22
 
 **Parent:** `2026-07-22-gamewindow-slice-8-checkpoint-i-ordered-composition.md`
 
@@ -183,3 +183,20 @@ edge has explicit reversible ownership, failure and retry gates pass, the old
 window body is gone, documentation/memory report the measured class size and
 test totals, and the commit is independently buildable. I.8 then composes the
 update/render roots and terminal session start over the typed result graph.
+
+## 8. Completion evidence
+
+- `SessionPlayerCompositionPhase` is the production Phase-7 path. The former
+  432-line radius/streaming/session/hydration/player/teleport block is absent
+  from `GameWindow`.
+- `SessionPlayerRuntimeBindings` plus exact-owner tokens cover every Phase-7
+  late edge. Focused tests cover reverse retry, rebind, and stale-token safety.
+- `DatSpawnClaimHydrationClassifier` owns the former window memo and exact
+  indoor-cell boundaries, including missing/empty DAT cases and reset.
+- `GameWindow.cs` is 2,479 raw lines, down 13,244 lines (84.2%) from the
+  15,723-line campaign baseline.
+- App Release: 3,420 passed / 3 intentional skips. Complete Release suite:
+  7,792 passed / 5 intentional skips. Clean solution build: 0 errors and the
+  17 pre-existing test warnings tracked by #228.
+- Behavior/order, architecture/ownership, and adversarial rollback reviews are
+  clean. No gameplay mechanism changed and no divergence row was introduced.

docs/plans/2026-07-22-gamewindow-slice-8-composition-lifecycle.md

@@ -29,7 +29,8 @@ audit.
 - [x] H — give terrain atlas, sky shader, retained `UiHost`, and both frame roots
   explicit single ownership and transfer seams.
 - [ ] I — group `OnLoad` into small ordered, fakeable composition phases with
-  transactional partial-acquisition rollback. Active detailed plan:
+  transactional partial-acquisition rollback. I.1–I.7 are complete; I.8
+  frame-root publication and terminal session start is active. Detailed plan:
   [`2026-07-22-gamewindow-slice-8-checkpoint-i-ordered-composition.md`](2026-07-22-gamewindow-slice-8-checkpoint-i-ordered-composition.md).
 - [ ] J — move the exact retryable shutdown manifest to a focused lifetime
   owner and prove all partial-load/reentrant/retry paths.