{"surfaces": [{"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 601s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-10-12T10:21:14.682742+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-10-12T10:11:13.658068+00:00", "silent_for_seconds": 601.0, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-10-12T10:21:14.682742+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "healthy", "method": "reported", "summary": "59.3GB free, not shrinking", "source": "statvfs:/", "read_at": "2026-10-12T10:11:13.431357+00:00", "detail": {"slope_gb_per_day": 1.064, "free_gb": 59.28, "free_bytes": 63646121984, "pct_free": 25.97, "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": "2026-10-11T21:53:10.707531+00:00", "held_seconds": 44282.7, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 23.2h ago", "source": "brief-send-log.jsonl", "read_at": "2026-10-12T10:11:13.431638+00:00", "detail": {"age_hours": 23.18, "row_count": 62, "last_send_at": "2026-10-11T11:00:08.254527+00:00", "window_hours": 30.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-11T21:53:10.707802+00:00", "held_seconds": 44282.7, "reported_by": "kevin-mac"}, {"surface": "cron:gcal-sync", "observation": "healthy", "method": "reported", "summary": "last success 0.0h ago", "source": "gcal-sync-heartbeat.json", "read_at": "2026-10-12T10:11:13.431688+00:00", "detail": {"age_hours": 0.02, "last_success": "2026-10-12T10:10:00.948341+00:00", "window_hours": 1.0, "withheld": ["collector_id", "counts", "received_at", "reported_method", "skipped", "wire_row_id"]}, "held_since": "2026-10-11T21:53:10.707850+00:00", "held_seconds": 44282.7, "reported_by": "kevin-mac"}, {"surface": "backup:baserow", "observation": "healthy", "method": "reported", "summary": "backup 2.2h old (31 retained)", "source": "infra-baserow-1:/baserow/backups", "read_at": "2026-10-12T10:11:13.565129+00:00", "detail": {"age_hours": 2.19, "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": "2026-10-11T21:53:10.841662+00:00", "held_seconds": 44282.7, "reported_by": "kevin-mac"}, {"surface": "cron:comms-freshness", "observation": "healthy", "method": "reported", "summary": "last success 0.5h ago", "source": "comms-freshness-run.json", "read_at": "2026-10-12T10:11:13.565420+00:00", "detail": {"age_hours": 0.48, "last_success": "2026-10-12T09:42:43.077915+00:00", "alarm": true, "invoked_by": "scheduler", "window_hours": 1.5, "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-10-11T21:53:10.842031+00:00", "held_seconds": 44282.7, "reported_by": "kevin-mac"}, {"surface": "service:staging-queue", "observation": "healthy", "method": "reported", "summary": "last success 0.0h ago", "source": "staging-queue-heartbeat.json", "read_at": "2026-10-12T10:11:13.565498+00:00", "detail": {"age_hours": 0.02, "last_success": "2026-10-12T10:10:17+00:00", "http_code": 200, "window_hours": 0.5, "withheld": ["collector_id", "probe", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-11T21:53:10.842100+00:00", "held_seconds": 44282.7, "reported_by": "kevin-mac"}, {"surface": "cron:kai-cadence", "observation": "healthy", "method": "reported", "summary": "last success 20.2h ago", "source": "kai-cadence-heartbeat.json", "read_at": "2026-10-12T10:11:13.565649+00:00", "detail": {"age_hours": 20.18, "last_success": "2026-10-11T14:00:16.044472+00:00", "invoked_by": "distributor", "outcome": "posted", "window_hours": 26.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-11T21:53:10.842306+00:00", "held_seconds": 44282.7, "reported_by": "kevin-mac"}, {"surface": "cron:devpost", "observation": "healthy", "method": "reported", "summary": "last success 5.5h ago", "source": "devpost-heartbeat.json", "read_at": "2026-10-12T10:11:13.565817+00:00", "detail": {"age_hours": 5.55, "last_success": "2026-10-12T04:38:24.598973+00:00", "window_hours": 26.0, "withheld": ["collector_id", "hb_source", "received_at", "reported_method", "row", "wire_row_id"]}, "held_since": "2026-10-11T21:53:10.842508+00:00", "held_seconds": 44282.7, "reported_by": "kevin-mac"}, {"surface": "cron:digest-hackfw", "observation": "healthy", "method": "reported", "summary": "last success 0.0h ago", 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"observation": "healthy", "method": "reported", "summary": "last success 0.0h ago", "source": "fwdao-index.html.heartbeat.json", "read_at": "2026-10-12T10:11:13.565949+00:00", "detail": {"brand": "fwdao", "age_hours": 0.02, "last_success": "2026-10-12T10:10:01.019798+00:00", "changed": false, "bytes": 56614, "window_hours": 1.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-11T21:53:10.842691+00:00", "held_seconds": 44282.7, "reported_by": "kevin-mac"}, {"surface": "cron:door", "observation": "healthy", "method": "reported", "summary": "last success 0.0h ago", "source": "index.html.heartbeat.json", "read_at": "2026-10-12T10:11:13.565991+00:00", "detail": {"brand": "door", "age_hours": 0.02, "last_success": "2026-10-12T10:10:01.455768+00:00", "changed": false, "bytes": 12254, "window_hours": 1.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-11T21:53:10.842748+00:00", 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