docs(observability): capture gateway-origin phase0 live baseline window

docs/plans/artifacts/phase0_baseline_live_2026-02-27.json

@@ -1,7 +1,7 @@
 {
-  "generated_at": "2026-02-27T07:39:16.384Z",
+  "generated_at": "2026-02-27T07:49:58.821Z",
   "source_audit_path": "~/.local/share/flynn/audit.log",
-  "source_event_count": 88,
+  "source_event_count": 94,
   "sampled_event_count": 88,
   "filters": {
     "sources": [

docs/plans/artifacts/phase0_baseline_live_gateway_2026-02-27.json

@@ -0,0 +1,94 @@
+{
+  "generated_at": "2026-02-27T07:47:41.346Z",
+  "source_audit_path": "~/.local/share/flynn/audit.log",
+  "source_event_count": 6,
+  "sampled_event_count": 6,
+  "filters": {
+    "since_ms": 1772178440693,
+    "until_ms": 1772178442694,
+    "sources": [
+      "gateway"
+    ],
+    "exclude_session_substrings": [
+      "probe"
+    ],
+    "anonymized_identifiers": true
+  },
+  "options": {
+    "sources": [
+      "gateway"
+    ],
+    "maxSessions": 20,
+    "maxChannels": 20,
+    "maxSkipReasons": 10
+  },
+  "summary": {
+    "event_counts": {
+      "run_state": 5,
+      "run_cancel": 1,
+      "reaction_match": 0,
+      "reaction_skip": 0
+    },
+    "run_outcomes": {
+      "overall": {
+        "total_outcomes": 2,
+        "complete": 1,
+        "cancelled": 1,
+        "error": 0,
+        "cancel_requested": 1,
+        "start": 2,
+        "completion_rate_pct": 50,
+        "cancel_rate_pct": 50,
+        "error_rate_pct": 0
+      },
+      "by_channel": [
+        {
+          "key": "ws",
+          "stats": {
+            "total_outcomes": 2,
+            "complete": 1,
+            "cancelled": 1,
+            "error": 0,
+            "cancel_requested": 1,
+            "start": 2,
+            "completion_rate_pct": 50,
+            "cancel_rate_pct": 50,
+            "error_rate_pct": 0
+          }
+        }
+      ],
+      "by_session": [
+        {
+          "key": "session_67024a716ed2",
+          "stats": {
+            "total_outcomes": 2,
+            "complete": 1,
+            "cancelled": 1,
+            "error": 0,
+            "cancel_requested": 1,
+            "start": 2,
+            "completion_rate_pct": 50,
+            "cancel_rate_pct": 50,
+            "error_rate_pct": 0
+          }
+        }
+      ]
+    },
+    "cancel_latency_ms": {
+      "count": 1,
+      "avg_ms": 0,
+      "p50_ms": 0,
+      "p95_ms": 0,
+      "min_ms": 0,
+      "max_ms": 0
+    },
+    "reactions": {
+      "matched": 0,
+      "skipped": 0,
+      "total": 0,
+      "match_rate_pct": null,
+      "skip_rate_pct": null,
+      "skip_reasons": []
+    }
+  }
+}

docs/plans/artifacts/phase0_baseline_live_gateway_2026-02-27.jsonl

@@ -0,0 +1,6 @@
+{"level":"info","event_type":"run.state","event":{"session_id":"session_67024a716ed2","channel":"ws","sender":"sender_776ae1d44923","source":"gateway","state":"start","request_id":"request_e7102f267cb2"},"timestamp":1772178441693}
+{"level":"info","event_type":"run.cancel","event":{"session_id":"session_67024a716ed2","channel":"ws","sender":"sender_776ae1d44923","source":"gateway","requested":true,"acknowledged":true,"request_id":"request_61e1e51ee26b","latency_ms":0},"timestamp":1772178441693}
+{"level":"info","event_type":"run.state","event":{"session_id":"session_67024a716ed2","channel":"ws","sender":"sender_776ae1d44923","source":"gateway","state":"cancel_requested","request_id":"request_61e1e51ee26b","duration_ms":0},"timestamp":1772178441694}
+{"level":"info","event_type":"run.state","event":{"session_id":"session_67024a716ed2","channel":"ws","sender":"sender_776ae1d44923","source":"gateway","state":"cancelled","request_id":"request_e7102f267cb2","duration_ms":1},"timestamp":1772178441694}
+{"level":"info","event_type":"run.state","event":{"session_id":"session_67024a716ed2","channel":"ws","sender":"sender_776ae1d44923","source":"gateway","state":"start","request_id":"request_897903dab9c4"},"timestamp":1772178441694}
+{"level":"info","event_type":"run.state","event":{"session_id":"session_67024a716ed2","channel":"ws","sender":"sender_776ae1d44923","source":"gateway","state":"complete","request_id":"request_897903dab9c4","duration_ms":0},"timestamp":1772178441694}

docs/plans/artifacts/phase0_baseline_live_gateway_2026-02-27.md

@@ -0,0 +1,50 @@
+# Phase 0 Baseline Telemetry Summary
+
+- Run state events: 5
+- Run cancel events: 1
+- Reaction matches: 0
+- Reaction skips: 0
+
+- Sources: gateway
+
+## Run Outcomes (Overall)
+
+- Total outcomes: 2
+- Complete: 1 (50.00%)
+- Cancelled: 1 (50.00%)
+- Errors: 0 (0.00%)
+- Cancel requested: 1
+- Starts: 2
+
+## Run Outcomes by Channel
+
+| Channel | Outcomes | Complete | Cancelled | Error | Complete % | Cancel % | Error % | Cancel Req | Starts |
+| --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
+| ws | 2 | 1 | 1 | 0 | 50.00% | 50.00% | 0.00% | 1 | 2 |
+
+## Run Outcomes by Session
+
+| Session | Outcomes | Complete | Cancelled | Error | Complete % | Cancel % | Error % | Cancel Req | Starts |
+| --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
+| session_67024a716ed2 | 2 | 1 | 1 | 0 | 50.00% | 50.00% | 0.00% | 1 | 2 |
+
+## Cancel Latency
+
+- Count: 1
+- Avg: 0ms
+- P50: 0ms
+- P95: 0ms
+- Min: 0ms
+- Max: 0ms
+
+## Reaction Decisions
+
+- Matched: 0 (n/a)
+- Skipped: 0 (n/a)
+
+### Skip Reasons
+
+| Reason | Count | Percent |
+| --- | ---: | ---: |
+| _none_ | 0 | 0.00% |
+