task-43: the scene door is hung; synthesized touch is the bridge still owed

docs/tasks/43-viewtop-compositor.md

@@ -279,11 +279,31 @@ it. See TASK-18.
   is unreachable. The engine owns shell geometry and publishes a region
   layout; inventing rectangles before it does would be a second, drifting idea
   of where the pill is. Wire it with the region layout, not before.
-- **Nothing dispatches `ToCompositor`.** The four touch intents round-trip and
-  `touch_down` already takes `Origin::Agent`, so the receiving end is built —
-  but the wire→compositor bridge is shell-host's. Annie's door is framed, not
-  hung, and until it is she reaches touch only through uinput, which is the
-  thing `input.rs` exists to replace.
+- ~~**Nothing dispatches `ToCompositor`.**~~ **Landed 2026-08-02** (`276bb3e`).
+  `control.rs` carries `wire::ToCompositor` verbatim under a `scene` verb, and
+  a test walks `verbs::INTENTS` asserting every advertised intent parses
+  through the socket — an intent the table advertises and the door cannot take
+  is a verb she cannot reach.
+
+  Real: `focus`, `close`, `place`, `pose`, `raise`, `lower`, `set_visible`,
+  `expose`. Pose and exposure are not settings nothing draws — the render
+  applies scale about the **pivot** (a shrink happens in place instead of
+  collapsing toward the top-left) and exposure as **alpha**, which the render
+  path was already passing `1.0` into.
+
+  The authority split lives in the dispatch rather than in a comment: geometry
+  is honoured with no clamping (a window half off the screen is composing, not
+  erring); exposure is clamped *down* by the gate and the reply carries what
+  was **granted**, so a caller cannot paint against a level it did not get;
+  `RequestLock`/`LockPresented` are refused explicitly so the refusal reads as
+  a decision rather than an oversight.
+
+  Still refused with `unavailable`, and saying what is missing: navigation
+  (policy built in `navigation.rs`, no bridge) and **synthesized touch** —
+  `input::Origin::Agent` and the disjoint slot namespace are built and nothing
+  feeds them, so she still reaches touch only through uinput, which is the
+  thing `input.rs` exists to replace. That is the highest-value remaining
+  bridge.
 - One refusal arm in `input::Router::resolve` is unreachable, pinned by
   `the_lock_claims_a_furniture_hit_before_the_reveal_check_can`. It goes live
   the moment any furniture is `Credential` or a step-up reveals chrome on a