diff --git a/.planning/STATE.md b/.planning/STATE.md
index 384ed33..e3451ae 100644
--- a/.planning/STATE.md
+++ b/.planning/STATE.md
@@ -2,8 +2,8 @@
 gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: — Production-ready surfaces
-status: Ready to execute
-last_updated: "2026-04-17T16:10:00.000Z"
+status: Phase 04 multi-agent follow-up complete
+last_updated: "2026-04-24T14:10:00Z"
 progress:
   total_phases: 5
   completed_phases: 2
@@ -19,13 +19,21 @@ progress:
 See: .planning/PROJECT.md (updated 2026-04-02)
 
 **Core value:** Пользователь ведёт диалог с Lambda через любой мессенджер без изменения ядра
-**Current focus:** Phase 04 complete — Matrix MVP implementation ready for testing
+**Current focus:** Phase 04 multi-agent routing follow-up fully implemented; ready for live validation or Phase 05 planning
 
 ## Current Phase
 
-**Phase 4** implementation complete: Matrix MVP
+**Phase 4** implementation complete: Matrix MVP + multi-agent routing
 
-Phase 4 is implemented. Next step is manual and automated testing of the Matrix MVP flow before deciding on follow-up work.
+All 5 tasks of the multi-agent routing follow-up are committed on `feat/matrix-direct-agent-prototype`:
+
+- `7627012` / `242f4aa` / `9ccba16` — agent registry loader, RoutedPlatformClient facade, fail-fast on missing registry in real mode
+- `a65227e` — dispatch chat_id contract alignment
+- `74cf028` — `!agent` command, `selected_agent_id` persistence, unbound-room binding on first selection
+- `7623039` — attachment normalization in core message handler
+- `e733119` — stale room blocking, `agent_id` binding on `!new`, durable restart state tests
+
+135 Matrix tests pass. The branch is ready for review and merge.
 
 ## Decisions
 
@@ -46,6 +54,12 @@ Phase 4 is implemented. Next step is manual and automated testing of the Matrix
 - [Phase 04]: Replaced AgentSessionClient with AgentApiWrapper and persistent agent connection lifecycle in Matrix runtime.
 - [Phase 04]: Added !save, !load, !reset, and !context commands with pending-state interception and local prototype session metadata.
 - [Phase 04]: Added Matrix-only Docker packaging for MVP deployment; platform services remain external to this compose setup.
+- [Phase 04]: Replaced the Matrix prod path again with direct upstream `AgentApi` per request; removed the local runtime wrapper from the prod flow.
+- [Phase 04]: Adopted `AGENT_BASE_URL` as the primary runtime contract and kept `AGENT_WS_URL` only as backward-compatible env fallback.
+- [Phase 04 follow-up]: Kept shared PlatformClient unchanged; introduced Matrix-specific RoutedPlatformClient to avoid breaking Telegram adapter.
+- [Phase 04 follow-up]: agent_routing_enabled flag on MatrixRuntime activates stale-room check only in real multi-agent mode (RoutedPlatformClient).
+- [Phase 04 follow-up]: !new binds agent_id at room creation time using selected_agent_id from user metadata.
+- [Phase 04 follow-up]: platform_chat_seq (PLATFORM_CHAT_SEQ_KEY) is stored in SQLiteStore and survives restart — confirmed by test.
 
 ## Blockers
 
@@ -57,6 +71,7 @@ Phase 4 is implemented. Next step is manual and automated testing of the Matrix
 
 - Phase 01.1 inserted after Phase 01: Matrix restart reconciliation and dev reset workflow (URGENT)
 - Phase 4 added: Matrix MVP: shared agent context and context management command
+- Phase 04 follow-up added inline: multi-agent routing (RoutedPlatformClient, !agent, stale room blocking, restart persistence)
 - New platform signal: upcoming proper `chat_id` support should enable file-level context separation and stronger context management in a future follow-up phase.
 
 ## Performance Metrics
@@ -68,12 +83,14 @@ Phase 4 is implemented. Next step is manual and automated testing of the Matrix
 | 01 | 03 | 3 min | 2 | 5 | 2026-04-02T19:57:34Z |
 | 01 | 04 | 3 min | 2 | 7 | 2026-04-02T20:03:38Z |
 | 01 | 05 | 2 min | 2 | 7 | 2026-04-03T09:28:47Z |
-| 01 | 06 | 4 min | 2 | 7 | 2026-04-03T09:35:39Z |
+| 01 | 06 | 4 min | 2 | 7 | 2026-04-03T09:35:47Z |
 | 04 | 01 | 1 session | 1 wave | 8 | 2026-04-17 |
 | 04 | 02 | 1 session | 2 commits + summary | 8 | 2026-04-17 |
 | 04 | 03 | 1 session | 1 commit + summary | 4 | 2026-04-17 |
+| 04 | follow-up | 1 session | 5 tasks | 10+ | 2026-04-24 |
 
 ## Session
 
-- Last session: 2026-04-17T16:10:00Z
-- Stopped at: Phase 4 implementation complete, ready for testing
+- Last session: 2026-04-24T14:10:00Z
+- Stopped at: Phase 04 multi-agent follow-up fully committed (e733119); 135 tests green; branch feat/matrix-direct-agent-prototype ready for review/merge
+- Resume file: HANDOFF deleted; no pending tasks