{"surfaces": [{"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 255s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-10-17T22:36:00.343392+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-10-17T22:31:45.491816+00:00", "silent_for_seconds": 254.9, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-10-17T22:36:00.343392+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "healthy", "method": "reported", "summary": "52.4GB free, 61 days of runway", "source": "statvfs:/", "read_at": "2026-10-17T22:31:45.271414+00:00", "detail": {"free_gb": 52.38, "pct_free": 22.95, "slope_gb_per_day": -0.779, "runway_days": 60.8, "floor_gb": 5.0, "total_gb": 228.27, "samples": 2008, "free_bytes": 56245448704, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-17T10:13:45.735346+00:00", "held_seconds": 44279.5, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 11.5h ago", "source": "brief-send-log.jsonl", "read_at": "2026-10-17T22:31:45.271726+00:00", "detail": {"window_hours": 30.0, "row_count": 68, "last_send_at": "2026-10-17T11:00:11.278303+00:00", "age_hours": 11.53, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-17T10:13:45.735640+00:00", "held_seconds": 44279.5, "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": "2026-10-17T22:31:45.271787+00:00", "detail": {"last_success": "2026-10-17T22:30:01.738720+00:00", "window_hours": 1.0, "age_hours": 0.03, "withheld": ["collector_id", "counts", "received_at", "reported_method", "skipped", "wire_row_id"]}, "held_since": "2026-10-17T10:13:45.735692+00:00", "held_seconds": 44279.5, "reported_by": "kevin-mac"}, {"surface": "backup:baserow", "observation": "healthy", "method": "reported", "summary": "backup 14.5h old (32 retained)", "source": "infra-baserow-1:/baserow/backups", "read_at": "2026-10-17T22:31:45.394569+00:00", "detail": {"backup_count": 32, "window_hours": 26.0, "newest_at": "2026-10-17T08:00:00+00:00", "newest": "baserow_backup_20261017_030000.tar.gz", "age_hours": 14.53, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-17T10:13:45.887282+00:00", "held_seconds": 44279.5, "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": "2026-10-17T22:31:45.394828+00:00", "detail": {"age_hours": 0.3, "last_success": "2026-10-17T22:13:37.569896+00:00", "window_hours": 1.5, "invoked_by": "scheduler", "alarm": true, "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-10-17T10:13:45.887463+00:00", "held_seconds": 44279.5, "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": "2026-10-17T22:31:45.394995+00:00", "detail": {"http_code": 200, "last_success": "2026-10-17T22:27:32+00:00", "window_hours": 0.5, "age_hours": 0.07, "withheld": ["collector_id", "probe", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-17T10:13:45.887526+00:00", "held_seconds": 44279.5, "reported_by": "kevin-mac"}, {"surface": "cron:kai-cadence", "observation": "healthy", "method": "reported", "summary": "last success 6.0h ago", "source": "kai-cadence-heartbeat.json", "read_at": "2026-10-17T22:31:45.395142+00:00", "detail": {"outcome": "posted", "last_success": "2026-10-17T16:30:02.333492+00:00", "window_hours": 26.0, "invoked_by": "cadence", "age_hours": 6.03, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-17T10:13:45.887575+00:00", "held_seconds": 44279.5, "reported_by": "kevin-mac"}, {"surface": "cron:devpost", "observation": "healthy", "method": "reported", "summary": "last success 0.4h ago", "source": "devpost-heartbeat.json", "read_at": "2026-10-17T22:31:45.395287+00:00", "detail": {"last_success": "2026-10-17T22:08:56.395177+00:00", "window_hours": 26.0, "age_hours": 0.38, "withheld": ["collector_id", "hb_source", "received_at", "reported_method", "row", "wire_row_id"]}, "held_since": "2026-10-17T10:13:45.887624+00:00", "held_seconds": 44279.5, "reported_by": "kevin-mac"}, {"surface": "cron:digest-hackfw", "observation": "healthy", "method": "reported", "summary": "last success 0.0h ago", "source": 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