docs(rollout): add phase 4 readiness plan

docs/plans/2026-02-25-phase4-rollout-operator-readiness.md

@@ -0,0 +1,73 @@
+# Phase 4 Rollout + Operator Readiness (Deeper Surfaces)
+
+Date: 2026-02-25
+
+## Summary
+
+This document provides the rollout plan, rollback playbook, and operator readiness checklist for the deeper end-user surfaces + integrated behavior stack workstreams (run-control, reactions v2, companion/canvas/voice).
+
+## Canary Rollout Plan
+
+### Guarded Rollout Steps
+
+1. **Run-control semantics (Phase 1)**
+Toggle: `server.queue.mode: interrupt` only for canary sessions via `server.queue.overrides.sessions`.
+Gate: `cancel-to-ack p95 <= 500ms`, zero duplicate final responses in integration tests.
+Observe: `run_state` events (`start`, `cancel_requested`, `cancelled`, `complete`, `error`) in gateway UI + audit logs.
+
+2. **Reactions v2 (Phase 2)**
+Toggle: restrict `automation.reactions` list to canary rules + scoped triggers.
+Gate: reaction false-positive rate <= 3% in audit logs (`reactionMatch`, `reactionSkip`).
+Observe: `system.metrics` reaction counters + recursion guard skip reasons.
+
+3. **Companion + Canvas (Phase 3)**
+Toggle: `server.nodes.enabled: true` for companion canary nodes, enable `server.nodes.feature_gates.ui.canvas`.
+Gate: companion reconnect success >= 99% in soak; canvas artifacts survive restart in integration runs.
+Observe: node registration + capability logs; canvas list/get/put success in gateway UI.
+
+4. **Voice Continuity (Phase 3)**
+Toggle: `tts.enabled: true` and `tts.enabled_channels` for canary channels; `audio.enabled: true` for inbound voice.
+Gate: no dropped responses when TTS fails; text-only fallback confirmed in tests.
+Observe: warning logs for TTS failures, reply delivery counts.
+
+### Rollout Cadence
+
+1. Week 1: enable canary on a single internal channel + 1-2 sessions.
+2. Week 2: expand to 5-10% sessions/channels after gates hold.
+3. Week 3: expand to 25-50% after second gate review.
+4. Week 4: default-on unless gates fail; keep toggles for rollback.
+
+## Rollback Playbook
+
+1. **Run-control rollback**
+Set `server.queue.mode: collect` globally.
+Remove canary overrides in `server.queue.overrides.sessions`.
+
+2. **Reactions rollback**
+Set `automation.reactions: []` or remove canary rules.
+Verify `reactionMatch` count drops to zero.
+
+3. **Companion rollback**
+Set `server.nodes.enabled: false` (or restrict `allowed_roles` to none).
+Clear companion node registrations by restarting gateway.
+
+4. **Canvas rollback**
+Disable `ui.canvas` in `server.nodes.feature_gates`.
+Optional: archive/remove `dataDir/canvas` after capture if needed.
+
+5. **Voice rollback**
+Set `tts.enabled: false` and/or remove `tts.enabled_channels`.
+Set `audio.enabled: false` to stop inbound voice processing.
+
+## Operator Readiness Checklist
+
+Confirm protocol and architecture docs are synchronized (`docs/api/PROTOCOL.md`, `docs/architecture/AGENT_DIAGRAM.md`, `docs/architecture/GATEWAY_SESSIONS_AND_QUEUE.md`).
+Verify audit logs and `system.metrics` are capturing `run_state` transitions, cancel latency buckets, and reaction match/skip reasons.
+Validate canary tests: run-control queue preemption + cancel, reaction priority/cooldown, companion reconnect + re-register, canvas persistence across restart, TTS failure fallback.
+Capture a before/after snapshot of error rate, cancellation latency, reaction false positives, companion reconnect success.
+
+## Owner + Comms
+
+- Primary owner: Flynn core team
+- Canary checkpoint cadence: weekly
+- Escalation: revert via rollback playbook within 1 hour of gate breach

docs/plans/state.json

@@ -6751,6 +6751,17 @@
         "docs/plans/state.json"
       ],
       "test_status": "pnpm test:run src/daemon/routing.test.ts passing"
+    },
+    "deeper-surfaces-phase4-rollout-readiness": {
+      "status": "completed",
+      "date": "2026-02-25",
+      "updated": "2026-02-25",
+      "summary": "Documented Phase 4 rollout plan, rollback playbook, and operator readiness checklist for deeper surfaces and behavior stack changes.",
+      "files_modified": [
+        "docs/plans/2026-02-25-phase4-rollout-operator-readiness.md",
+        "docs/plans/state.json"
+      ],
+      "test_status": "docs only"
     }
   },
   "overall_progress": {