{"surfaces": [{"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 405s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-10-12T20:35:49.110294+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-10-12T20:29:03.967247+00:00", "silent_for_seconds": 405.1, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-10-12T20:35:49.110294+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "healthy", "method": "reported", "summary": "59.0GB free, not shrinking", "source": "statvfs:/", "read_at": "2026-10-12T20:29:03.662578+00:00", "detail": {"slope_gb_per_day": 1.044, "free_gb": 59.03, "free_bytes": 63387279360, "pct_free": 25.86, "samples": 2011, "floor_gb": 5.0, "runway_days": null, "total_gb": 228.27, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-12T08:10:39.978747+00:00", "held_seconds": 44303.7, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 9.4h ago", "source": "brief-send-log.jsonl", "read_at": "2026-10-12T20:29:03.662834+00:00", "detail": {"age_hours": 9.43, "row_count": 63, "last_send_at": "2026-10-12T11:03:23.591696+00:00", "window_hours": 30.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-12T08:10:39.979198+00:00", "held_seconds": 44303.7, "reported_by": "kevin-mac"}, {"surface": "cron:gcal-sync", "observation": "healthy", "method": "reported", "summary": "last success 0.2h ago", "source": "gcal-sync-heartbeat.json", "read_at": "2026-10-12T20:29:03.663006+00:00", "detail": {"age_hours": 0.15, "last_success": "2026-10-12T20:20:00.898332+00:00", "window_hours": 1.0, "withheld": ["collector_id", "counts", "received_at", "reported_method", "skipped", "wire_row_id"]}, "held_since": "2026-10-12T08:10:39.979256+00:00", "held_seconds": 44303.7, "reported_by": "kevin-mac"}, {"surface": "backup:baserow", "observation": "healthy", "method": "reported", "summary": "backup 12.5h old (31 retained)", "source": "infra-baserow-1:/baserow/backups", "read_at": "2026-10-12T20:29:03.803193+00:00", "detail": {"age_hours": 12.48, "newest": "baserow_backup_20261012_030000.tar.gz", "backup_count": 31, "newest_at": "2026-10-12T08:00:00+00:00", "window_hours": 26.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-12T08:10:40.173223+00:00", "held_seconds": 44303.6, "reported_by": "kevin-mac"}, {"surface": "cron:comms-freshness", "observation": "healthy", "method": "reported", "summary": "last success 0.3h ago", "source": "comms-freshness-run.json", "read_at": "2026-10-12T20:29:03.803545+00:00", "detail": {"age_hours": 0.27, "last_success": "2026-10-12T20:12:47.122619+00:00", "alarm": true, "invoked_by": "scheduler", "window_hours": 1.5, "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-10-12T08:10:40.173976+00:00", "held_seconds": 44303.6, "reported_by": "kevin-mac"}, {"surface": "service:staging-queue", "observation": "healthy", "method": "reported", "summary": "last success 0.1h ago", "source": "staging-queue-heartbeat.json", "read_at": "2026-10-12T20:29:03.803724+00:00", "detail": {"age_hours": 0.06, "last_success": "2026-10-12T20:25:28+00:00", "http_code": 200, "window_hours": 0.5, "withheld": ["collector_id", "probe", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-12T08:10:40.174076+00:00", "held_seconds": 44303.6, "reported_by": "kevin-mac"}, {"surface": "cron:kai-cadence", "observation": "healthy", "method": "reported", "summary": "last success 6.4h ago", "source": "kai-cadence-heartbeat.json", "read_at": "2026-10-12T20:29:03.803894+00:00", "detail": {"age_hours": 6.43, "last_success": "2026-10-12T14:03:04.087541+00:00", "invoked_by": "distributor", "outcome": "posted", "window_hours": 26.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-12T08:10:40.174563+00:00", "held_seconds": 44303.6, "reported_by": "kevin-mac"}, {"surface": "cron:devpost", "observation": "healthy", "method": "reported", "summary": "last success 0.3h ago", "source": "devpost-heartbeat.json", "read_at": "2026-10-12T20:29:03.804049+00:00", "detail": {"age_hours": 0.34, "last_success": "2026-10-12T20:08:28.089887+00:00", "window_hours": 26.0, "withheld": ["collector_id", "hb_source", "received_at", "reported_method", "row", "wire_row_id"]}, "held_since": "2026-10-12T08:10:40.175201+00:00", "held_seconds": 44303.6, "reported_by": "kevin-mac"}, {"surface": "cron:digest-hackfw", "observation": "healthy", "method": "reported", "summary": "last success 0.2h ago", 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"observation": "healthy", "method": "reported", "summary": "last success 0.2h ago", "source": "fwdao-index.html.heartbeat.json", "read_at": "2026-10-12T20:29:03.804598+00:00", "detail": {"brand": "fwdao", "age_hours": 0.15, "last_success": "2026-10-12T20:20:01.379677+00:00", "changed": false, "bytes": 56626, "window_hours": 1.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-12T08:10:40.175423+00:00", "held_seconds": 44303.6, "reported_by": "kevin-mac"}, {"surface": "cron:door", "observation": "healthy", "method": "reported", "summary": "last success 0.2h ago", "source": "index.html.heartbeat.json", "read_at": "2026-10-12T20:29:03.805700+00:00", "detail": {"brand": "door", "age_hours": 0.15, "last_success": "2026-10-12T20:20:01.928249+00:00", "changed": false, "bytes": 12254, "window_hours": 1.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-12T08:10:40.175498+00:00", 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