docs(B.4b): ship handoff + close #57 + file #58 + roadmap/CLAUDE update

Phase B.4b shipped end-to-end 2026-05-13. Holtburg inn doorway
double-click verified: pick -> BuildUse -> ACE SetState reply ->
ID-translated registry update -> CollisionExemption exempts ->
player walks through. M1 demo target "open the inn door" met.

9 commits on this branch:
- Tasks 1-4 per plan (BuildRay, Pick, rename, handler wiring)
- 4 bonus visual-test discoveries:
  * InputDispatcher double-click detection (was dead code)
  * DoubleClick activation gate fix in OnInputAction
  * L.2g slice 1b: CollisionExemption widened to ETHEREAL alone
  * L.2g slice 1c: ServerGuid -> entity.Id translation (silent blocker)

Closes #57. Files #58 for door swing animation (UpdateMotion routing
for non-creature entities, M1 deferred polish). Updates roadmap and
CLAUDE.md Phase L.2 paragraph. Memory file project_interaction_pipeline.md
updated outside the repo.

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

docs/ISSUES.md

@@ -46,62 +46,70 @@ Copy this block when adding a new issue:
 
 # Active issues
 
-## #57 — B.4 interaction-handler missing: clicking on doors / NPCs / items silently does nothing
+## #58 — Door swing animation: UpdateMotion not wired for non-creature entities
 
 **Status:** OPEN
-**Severity:** HIGH (M1 blocker — demo target *"open the inn door, click an NPC, pick up an item"* is fully blocked)
+**Severity:** MEDIUM (M1 demo cosmetic — doors function but don't visually animate)
+**Filed:** 2026-05-13
+**Component:** animation / `UpdateMotion (0xF74D)` routing for non-creature entities
+
+**Description:** B.4b shipped end-to-end interaction (click → BuildUse →
+SetState → collision exempt → walk through). When ACE opens a door it
+broadcasts TWO packets: `SetState (0xF74B)` (the collision-bit flip,
+handled by L.2g) AND `UpdateMotion (0xF74D)` with `(NonCombat, On)` (the
+swing animation cycle, NOT handled). acdream's `UpdateMotion` pipeline is
+currently scoped to player + creature animation (Phase L.3); door entities
+do not receive cycle commands.
+
+**Root cause / status:** The `UpdateMotion` packet handler in
+`GameWindow.OnLiveMotionUpdated` filters to player + creature entity types.
+Non-creature WorldEntity instances (doors, chests, etc.) silently drop
+the `(NonCombat, On)` cycle command that ACE sends when the door opens.
+
+**Files (likely):**
+- `src/AcDream.App/Rendering/GameWindow.cs` — `OnLiveMotionUpdated` handler
+- `src/AcDream.Core/Physics/AnimationSequencer.cs` — may have creature-specific assumptions
+- The entity-spawn adapter (unknown if non-creature entities are wired to an AnimationSequencer at all)
+
+**Acceptance:** Double-click a door → swing animation plays → ~30s later the
+door auto-close animation plays. Log shows `UpdateMotion (NonCombat, On)` processed
+for the door entity.
+
+**Estimated scope:** Unknown. Could be quick (route UpdateMotion to non-creature
+WorldEntity with cycle dispatch, ~30 min) or moderate (AnimationSequencer audit
+for creature-specific assumptions, ~2 hrs). Spike before committing to estimate.
+
+---
+
+## #57 — [DONE 2026-05-13] B.4 interaction-handler missing: clicking on doors / NPCs / items silently does nothing
+
+**Status:** DONE
+**Closed:** 2026-05-13
+**Severity:** HIGH (was M1 blocker)
 **Filed:** 2026-05-12
 **Component:** input / interaction / `GameWindow.OnInputAction`
 
-**Description:** Discovered 2026-05-12 while running the L.2g slice 1
-visual test. Phase B.4 (2026-04-28) shipped half of itself: the wire-
-message builders (`InteractRequests.BuildUse` / `BuildUseWithTarget` /
-`BuildPickUp`), the supporting classes (`SelectionState`, `WorldPicker`),
-the `InputAction` enum entries (`SelectLeft`, `SelectDblLeft`,
-`SelectRight`, `SelectDblRight`, `UseSelected`, `SelectionPickUp`, etc.),
-and the default keybindings (LMB → `SelectLeft`, LMB-dblclick →
-`SelectDblLeft`, RMB → `SelectRight`, R → `UseSelected`, F →
-`SelectionPickUp`). What was never shipped: a case for ANY of those
-actions in `GameWindow.OnInputAction`'s switch. The runtime diagnostic
-`[input] SelectLeft Press` fires when you click — confirming the
-dispatcher resolves the chord — but nothing downstream listens, so the
-click silently does nothing. Neither does double-click, R, or F. The
-inbound side (`MoveToObjectReceived`, `StateUpdated` after L.2g slice 1)
-is wired and ready; the block is purely outbound.
+**Closure:** Closed by Phase B.4b on branch `claude/compassionate-wilson-23ff99`
+(9 implementation commits, Tasks 1-4 per plan + 4 bonus fixes). The
+full round-trip — double-click door → `WorldPicker.BuildRay` + `Pick` →
+`InteractRequests.BuildUse` → ACE `SetState` reply → `ShadowObjectRegistry`
+mutation (via fixed ServerGuid→entity.Id translation) → `CollisionExemption.ShouldSkip`
+exempts (widened to ETHEREAL-alone) → player walks through — was
+visual-verified at the Holtburg inn doorway 2026-05-13. Four bonus
+discoveries were required beyond the original plan: (1) `InputDispatcher`
+had no double-click detection, (2) `OnInputAction` gate blocked
+`DoubleClick` activations, (3) `CollisionExemption` required both
+ETHEREAL+IGNORE_COLLISIONS while ACE sends only ETHEREAL, (4)
+`OnLiveStateUpdated` passed server GUID to a local-entity-ID-keyed
+registry. M1 demo target "open the inn door" met. See
+[docs/research/2026-05-13-b4b-shipped-handoff.md](research/2026-05-13-b4b-shipped-handoff.md)
+for full evidence and rationale.
 
-**Root cause / status:** B.4 handler integration step was evidently
-dropped or never landed. Memory file
-`memory/project_interaction_pipeline.md` was updated 2026-05-12 to
-reflect this reality (previous text claimed shipped).
-
-**Files:**
-- `src/AcDream.App/Rendering/GameWindow.cs` — `OnInputAction` switch
-  around line 8546+ has no `Select*` cases.
-- `src/AcDream.Core.Net/Messages/InteractRequests.cs` — wire builders
-  exist but have zero callers in `src/`.
-- `src/AcDream.Core/Selection/SelectionState.cs` — class exists, zero
-  production callers.
-- `src/AcDream.App/Rendering/WorldPicker.cs` — class exists, zero
-  production callers.
-- `src/AcDream.UI.Abstractions/Input/KeyBindings.cs:300-320` — bindings
-  for `SelectLeft` / `SelectDblLeft` / `SelectRight` / `SelectDblMid`
-  exist.
-
-**Research:** [docs/research/2026-05-12-l2g-slice1-shipped-handoff.md](research/2026-05-12-l2g-slice1-shipped-handoff.md)
-"Why the visual test is deferred" section has the full investigation.
-
-**Acceptance:** Double-left-clicking on a door in the Holtburg inn
-doorway sends a `0xF7B1 / 0x0036 Use` to the server, the server flips
-the door's `Ethereal` bit and broadcasts `SetState (0xF74B)`, the
-L.2g-slice-1 chain mutates `ShadowObjectRegistry`, the
-`CollisionExemption.ShouldSkip` check honors it, and the player can
-walk through the doorway. Visual verification + log grep (per the
-L.2g handoff's reproducibility recipe) both pass.
-
-**Status promotion:** This is a phase-sized follow-up (estimated
-30-50 LOC, ~30 min). Promoted to **Phase B.4b** in the L.2 milestone
-context and the CLAUDE.md "Next phase candidates" list. Will be closed
-as `DONE (promoted to Phase B.4b)` once that phase's design spec lands.
+**Files (what shipped):**
+- `src/AcDream.Core/Selection/WorldPicker.cs` (new; formerly zero callers, now wired)
+- `src/AcDream.App/Rendering/GameWindow.cs` — `OnInputAction` switch cases for `SelectLeft` / `SelectDblLeft` / `UseSelected`; `OnLiveStateUpdated` ServerGuid→Id translation; `_entitiesByServerGuid` reverse-lookup dict
+- `src/AcDream.UI.Abstractions/Input/InputDispatcher.cs` — double-click detection
+- `src/AcDream.Core/Physics/CollisionExemption.cs` — widened to ETHEREAL-alone
 
 ---