docs(phys L.2g): slice 1 shipped handoff + B.4 gap discovery + plan-of-record

L.2g slice 1 is CODE-COMPLETE: parser + registry mutator + WorldSession
dispatcher + GameWindow subscriber (4 commits: 2459f28, d538915,
536a608, 108e386). Build clean, 6 new tests pass, baseline-stable
across the full suite. Per-commit + final integration code reviews
all approved.

Visual verification deferred: while running the Holtburg-doorway test,
Phase B.4's outbound Use handler turned out to be unwired. The wire
builders (InteractRequests.BuildUse), classes (SelectionState,
WorldPicker), input-action enums, and keybindings all exist — but
GameWindow.OnInputAction has no case for SelectDblLeft, so the click
silently does nothing. The inbound L.2g chain we just landed can't
fire until something sends an outbound Use.

This commit captures the handoff + reframes next-session work:

  * docs/research/2026-05-12-l2g-slice1-shipped-handoff.md (NEW)
    Full evidence: 4 shipped commits, end-to-end code flow, B.4
    discovery explanation, 4 minor + 1 Important review notes
    (the Important one is a test-coverage gap that the B.4b visual
    test will settle automatically), reproducibility recipe,
    next-session pick.

  * CLAUDE.md
    "Currently in Phase L.2" paragraph: L.2g slice 1 code shipped;
    visual test deferred to B.4b. Next-phase-candidates list:
    L.2g slice 1 (now done) replaced with the B.4b candidate
    pointing at the slice scope.

  * docs/plans/2026-04-29-movement-collision-conformance.md
    L.2g section gains a "Current shipped slice (2026-05-12):" table
    listing the 4 commits.

  * docs/plans/2026-05-12-milestones.md
    M1 phase-list updated: L.2g slice 1 (code) shipped; B.4 renamed
    "B.4 / B.4b" with the gap-discovery note + B.4b shape.

  * docs/ISSUES.md
    New issue #57 (HIGH) for the B.4 interaction-handler gap.
    Promoted to Phase B.4b; will close as
    DONE (promoted to Phase B.4b) when B.4b's design spec lands.

  * Memory file project_interaction_pipeline.md (in personal
    memory dir, not in this commit) updated to reflect reality.

Next session: Phase B.4b (~30-50 LOC, 1-2 subagent dispatches,
~30 min). Subscribe SelectDblLeft -> WorldPicker.Pick ->
InteractRequests.BuildUse -> _liveSession.SendGameMessage. Same
Holtburg-doorway visual test verifies both L.2g slice 1 and B.4b
in one pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/plans/2026-04-29-movement-collision-conformance.md

@@ -266,6 +266,24 @@ Full design spec:
 M1 critical path: this slice unblocks the *"open the inn door"* demo
 scenario.
 
+Current shipped slice (2026-05-12):
+
+| Commit | Subject |
+|---|---|
+| `2459f28` | `feat(phys L.2g slice 1): inbound SetState (0xF74B) parser` |
+| `d538915` | `feat(phys L.2g slice 1): ShadowObjectRegistry.UpdatePhysicsState` |
+| `536a608` | `feat(phys L.2g slice 1): WorldSession dispatches SetState (0xF74B) + hex probe` |
+| `108e386` | `feat(phys L.2g slice 1): GameWindow routes SetState + extends [entity-source] log` |
+
+Slice 1 is CODE-COMPLETE: parser + registry mutator + WorldSession
+dispatcher + GameWindow subscriber. 6 new tests pass (3 parser + 3
+registry). Build clean. Per-commit + final integration code reviews
+all approved. **Visual verification deferred to Phase B.4b** — the
+inbound SetState chain can't fire at runtime until B.4b finishes the
+outbound Use handler. See
+[docs/research/2026-05-12-l2g-slice1-shipped-handoff.md](../research/2026-05-12-l2g-slice1-shipped-handoff.md)
+for full evidence + the 4 minor + 1 Important review notes.
+
 ## Named Retail Anchors
 
 Primary source: `docs/research/named-retail/acclient_2013_pseudo_c.txt`.

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

@@ -101,13 +101,19 @@ doorway. Open the inn door. Click an NPC and see selection feedback. Pick
 up an item from the ground.
 
 **Phases to ship:**
-- **L.2 (all sub-lanes a–g)** — Movement & Collision Conformance. Currently
-  active; L.2a slices 1+2+3 + L.2d slice 1+1.5 shipped 2026-05-12. L.2g
-  (dynamic PhysicsState toggling — doors) brainstormed + design-spec'd
-  2026-05-12 evening, implementation next.
-- **B.4** — `Use` / `UseWithTarget` / `PickUp` outbound messages
-  (shipped 2026-04-28; remains in M1 scope until L.2g completes the
-  inbound-state half of the Use round-trip).
+- **L.2 (all sub-lanes a–g)** — Movement & Collision Conformance.
+  L.2a slices 1+2+3 + L.2d slice 1+1.5 + L.2g slice 1 (code) shipped
+  2026-05-12. L.2g slice 1 visual verification deferred to B.4b session
+  (the inbound SetState chain can't fire until the outbound Use sends).
+- **B.4 / B.4b** — `Use` / `UseWithTarget` / `PickUp` interaction.
+  B.4 (2026-04-28) shipped the wire builders, `SelectionState`,
+  `WorldPicker`, the input-action enums, and the keybindings — but
+  *not* the `GameWindow.OnInputAction` handler that ties them
+  together. As of 2026-05-12, clicking on a door silently does nothing.
+  **B.4b** is the small follow-up slice (~30-50 LOC) that subscribes
+  `SelectDblLeft` and routes through pick → BuildUse → send. Once B.4b
+  lands, the same Holtburg-doorway visual test verifies both L.2g
+  slice 1 and B.4b in one pass.
 
 **Freeze on landing:**
 - L.2 zone (collision, cell ownership, transition parity, wire authority)