docs(observability): document phase-0 telemetry and baseline workflow

docs/plans/state.json

@@ -63,6 +63,23 @@
       ],
       "test_status": "pnpm test:run src/audit/phase0BaselineSummary.test.ts passing"
     },
+    "phase0-ticket-0.5-docs-diagram-state-sync": {
+      "status": "completed",
+      "date": "2026-02-25",
+      "updated": "2026-02-25",
+      "summary": "Updated protocol/docs/diagrams for phase-0 telemetry fields, documented baseline workflow, and generated initial phase-0 baseline artifacts (empty sample window).",
+      "files_modified": [
+        "README.md",
+        "docs/api/PROTOCOL.md",
+        "docs/architecture/AGENT_DIAGRAM.md",
+        "docs/architecture/GATEWAY_SESSIONS_AND_QUEUE.md",
+        "docs/plans/2026-02-25-phase0-instrumentation-ticket-checklist.md",
+        "docs/plans/artifacts/phase0_baseline_2026-02-25.md",
+        "docs/plans/artifacts/phase0_baseline_2026-02-25.json",
+        "docs/plans/state.json"
+      ],
+      "test_status": "pnpm audit:phase0-baseline --audit ~/.local/share/flynn/audit.log --since 2026-02-25T00:00:00Z --format markdown/json (0 events in window)"
+    },
     "phase0-instrumentation-ticket-checklist": {
       "status": "completed",
       "date": "2026-02-25",
@@ -6677,7 +6694,8 @@
     "deeper_surfaces_phase0_ticket_02": "completed — gateway + daemon routing emit run lifecycle/cancel telemetry and reaction match/skip audit events with filter summaries and cancellation latency, plus focused tests",
     "deeper_surfaces_phase0_ticket_03": "completed — gateway metrics now track run-state outcomes, cancel latency samples, and reaction decision counters with routing/gateway emitters",
     "deeper_surfaces_phase0_ticket_04": "completed — added phase-0 baseline summary tooling for run outcomes, cancel latency, and reaction decisions with markdown/json CLI output",
-    "next_up": "Implement Ticket 0.5 from docs/plans/2026-02-25-phase0-instrumentation-ticket-checklist.md",
+    "deeper_surfaces_phase0_ticket_05": "completed — documented phase-0 telemetry fields/workflow, refreshed architecture/protocol docs, and generated baseline artifacts",
+    "next_up": "Exercise gateway + channel sessions to emit run/reaction events, then regenerate phase-0 baseline artifacts with real samples",
     "pi_embedded_canary_spike": "completed — added optional pi_embedded backend adapter, canary-safe no-tools routing guard, backend success/fallback latency audit events, and docs/diagram updates while native remains default",
     "pi_embedded_evaluation_phase": "completed — final decision rollback (applied in runtime config): Window A failed latency/fallback gates (p50 +259ms, p95 +5695ms, fallback 25%, categories: pi_module_interface/empty_assistant_text); Window B remained sample-insufficient; controlled probes verified guard coverage (pi_no_tools_mode/capability_query/attachments_present each hit once)",
     "pi_embedded_manual_mode": "completed — added persisted runtime backend controls for manual Pi activation/deactivation (`/runtime` preferred, `/backend` alias; `status`, `activate pi`, `deactivate pi`, `use config`) while keeping config-driven default routing",