{
  "id": "edge-cache/prometheus-metrics",
  "slug": "prometheus-metrics",
  "title": "Session: prometheus-metrics — 2026-09-29",
  "type": "source",
  "project": "edge-cache",
  "date": "2026-09-29",
  "started": "2026-09-29T15:30:00+00:00",
  "ended": "2026-09-29T16:54:00+00:00",
  "model": "claude-sonnet-4-6",
  "cwd": "/home/dev/code/edge-cache",
  "git_branch": "feat/metrics",
  "permission_mode": "default",
  "user_messages": 1,
  "tool_calls": 4,
  "tools_used": [
    "Bash",
    "Edit",
    "Write"
  ],
  "is_subagent": false,
  "wikilinks_out": [
    "Grafana",
    "Observability",
    "Prometheus",
    "edge-cache"
  ],
  "body_text": "Project: edge-cache · Branch: feat/metrics · Mode: default · Model: claude-sonnet-4-6\n\nSummary\n\nExposed Prometheus metrics: hit/miss/stale counters per route, an origin latency histogram with sensible buckets, and a gauge for in-flight refreshes. Added a Grafana dashboard JSON to the repo.\n\nConversation\n\nTurn 1 — User\n\nAdd metrics so we can see the hit ratio per route.\n\nTurn 1 — Assistant\n\nCounters labelled by route and result, latency histogram for origin fetches, in-flight gauge. Route labels come from the matched pattern, not the raw path, to keep cardinality low.\n\nTools used in this turn:\n\n- Write: metrics/metrics.go\n- Edit: cache/handler.go\n- Write: deploy/grafana/edge-cache.json\n- Bash: go test ./... — ok\n\nConnections\n\n- edge-cache\n- Prometheus\n- Grafana\n- Observability",
  "sha256": "873cb5662e47c3f3",
  "source_url": "sessions/edge-cache/2026-09-29-prometheus-metrics.html"
}