docs(R4-V6): register sweep + roadmap + plan trail - R4 SHIPPED

Register:
- Verified retired: AD-8/AD-9/AP-8/AP-9 (V4), TS-36/AD-26 (V5) - all gone.
- AD-34 widened: MoveToManager.pending_actions joins the managed-LinkedList
  row, with the MoveToNode rename note (retail MoveToManager::MovementNode,
  renamed to avoid colliding with R2's MotionNode) - V2 owed this note.
- NEW TS-39: MoveToManager.StickTo/Unstick are unbound no-op seams - a
  sticky MoveTo (wire bit 0x80) completes-and-stops instead of sticking;
  PositionManager/StickyManager bodies are R5 scope (call shapes only in
  the R4 extraction). Retires with R5.
- Re-anchored after the V5 controller deletion shifted lines: AD-25
  (:1212->:874), AP-24 (:170->:176), AP-30 (:1503->:1110), TS-21
  (:362->:311, stale-comment clause updated - V5 fixed the comment).
- AP-79 (widened in V5's commit) and the PlanFromVelocity row (V4)
  verified present.

Roadmap: Phase R entry - R4 SHIPPED 2026-07-03 (V0-V6 trail), R2+R3+R4
share the ONE pending user visual pass; next code stage R5 (MovementManager
facade + Sticky/Constraint/TargetManager).

Plan of record: R4 stage entry filled in with the full V0-V6 commit trail
+ expected-diffs for the visual pass (retail cylinder-distance stop, real
turn cycles during corrections, CanCharge walk/run legs).

Handoff doc: postscript - R4 complete, V4 smoke log analyzed clean and
deleted; memory index updated (animation deep-dive map: MoveToManager gap
CLOSED, the "three approximations" pattern retired).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/research/2026-07-03-phase-r-session-handoff.md

@@ -1,5 +1,18 @@
 # Phase R handoff — fresh-session entry point (2026-07-03)
 
+> **POSTSCRIPT (2026-07-03, later session): R4 is COMPLETE.** V5 (local-player
+> cutover) shipped as `b3decdfa` — P1 gate ported verbatim, B.6 auto-walk
+> deleted, TS-36 bound, run-rate re-anchored to PD skills + mt-6/7
+> my_run_rate with NO AD row (the contingency wasn't needed — see the
+> V0-pins.md P1 postscript), MoveToComplete seam widened to natural
+> completion for AD-27, plus three adversarial-review fixes (remote
+> HitGround relay, mt-8 wire_heading degrade, remote curTime clock). V6
+> register/roadmap/memory sweep shipped in the follow-up commit. The V4
+> smoke log was analyzed CLEAN (mt-6/8 events all dispatched, arrival
+> stop transitions, zero exceptions/stalls). Suite: 3,956 green.
+> REMAINING: the ONE combined R2+R3+R4 user visual pass, then R5.
+> The sections below are the historical entry state, kept verbatim.
+
 **Read this first, then the plan of record**
 (`docs/plans/2026-07-02-retail-motion-animation-rewrite.md`). This session
 ran the R2→R4 arc of the Phase R mandate; the fresh session picks up at