{"surfaces": [{"surface": "host:disk/", "observation": "healthy", "method": "local_artifact", "summary": "755.7GB free, 907361733 days of runway", "source": "statvfs:/", "read_at": "2026-09-26T02:22:38.843895+00:00", "detail": {"free_bytes": 811478810624, "free_gb": 755.75, "total_gb": 755.75, "pct_free": 100.0, "floor_gb": 5.0, "samples": 1342, "slope_gb_per_day": -0.0, "runway_days": 907361733.1}, "held_since": "2026-09-26T02:22:38.843895+00:00", "held_seconds": 0.0}, {"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 417s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-09-26T02:22:37.603057+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-09-26T02:15:40.514308+00:00", "silent_for_seconds": 417.1, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-09-26T02:22:37.603057+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "fault", "method": "reported", "summary": "16.2GB free but losing 0.83GB/day: hits the floor in 13.5 days", "source": "statvfs:/", "read_at": "2026-09-26T02:15:40.253580+00:00", "detail": {"pct_free": 7.08, "floor_gb": 5.0, "runway_days": 13.5, "free_gb": 16.15, "free_bytes": 17343500288, "slope_gb_per_day": -0.825, "total_gb": 228.27, "samples": 2011, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T22:44:41.887490+00:00", "held_seconds": 12658.4, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 15.2h ago", "source": "brief-send-log.jsonl", "read_at": "2026-09-26T02:15:40.254259+00:00", "detail": {"last_send_at": "2026-09-25T11:01:08.923796+00:00", "row_count": 46, "age_hours": 15.24, "window_hours": 30.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T13:57:06.005300+00:00", "held_seconds": 44314.2, "reported_by": "kevin-mac"}, {"surface": "cron:gcal-sync", "observation": "healthy", "method": "reported", "summary": "last success 0.1h ago", "source": "gcal-sync-heartbeat.json", "read_at": "2026-09-26T02:15:40.254703+00:00", "detail": {"last_success": "2026-09-26T02:10:01.463517+00:00", "age_hours": 0.09, "window_hours": 1.0, "withheld": ["collector_id", "counts", "received_at", "reported_method", "skipped", "wire_row_id"]}, "held_since": "2026-09-25T13:57:06.005712+00:00", "held_seconds": 44314.2, "reported_by": "kevin-mac"}, {"surface": "backup:baserow", "observation": "healthy", "method": "reported", "summary": "backup 18.3h old (31 retained)", "source": "infra-baserow-1:/baserow/backups", "read_at": "2026-09-26T02:15:40.353002+00:00", "detail": {"newest_at": "2026-09-25T08:00:00+00:00", "age_hours": 18.26, "newest": "baserow_backup_20260925_030000.tar.gz", "backup_count": 31, "window_hours": 26.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T13:57:06.084668+00:00", "held_seconds": 44314.3, "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": "2026-09-26T02:15:40.353450+00:00", "detail": {"invoked_by": "interactive", "alarm": true, "last_success": "2026-09-26T01:58:08.274147+00:00", "age_hours": 0.29, "window_hours": 1.5, "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-09-25T13:57:06.085242+00:00", "held_seconds": 44314.3, "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": "2026-09-26T02:15:40.353712+00:00", "detail": {"http_code": 200, "last_success": "2026-09-26T02:13:18+00:00", "age_hours": 0.04, "window_hours": 0.5, "withheld": ["collector_id", "probe", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T13:57:06.085451+00:00", "held_seconds": 44314.3, "reported_by": "kevin-mac"}, {"surface": "cron:kai-cadence", "observation": "healthy", "method": "reported", "summary": "last success 4.0h ago", "source": "kai-cadence-heartbeat.json", "read_at": "2026-09-26T02:15:40.354137+00:00", "detail": {"invoked_by": "cadence", "last_success": "2026-09-25T22:15:08.602707+00:00", "age_hours": 4.01, "outcome": "posted", "window_hours": 26.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T13:57:06.085726+00:00", "held_seconds": 44314.3, "reported_by": "kevin-mac"}, {"surface": "cron:devpost", "observation": "healthy", "method": "reported", "summary": "last success 0.2h ago", "source": "devpost-heartbeat.json", "read_at": "2026-09-26T02:15:40.354376+00:00", "detail": {"last_success": "2026-09-26T02:03:19.772015+00:00", "age_hours": 0.21, "window_hours": 26.0, "withheld": ["collector_id", "hb_source", "received_at", "reported_method", "row", "wire_row_id"]}, "held_since": "2026-09-25T13:57:06.086053+00:00", "held_seconds": 44314.3, "reported_by": "kevin-mac"}, {"surface": "cron:digest-hackfw", "observation": "healthy", "method": "reported", "summary": "last success 0.1h ago", "source": "index.html.heartbeat.json", "read_at": "2026-09-26T02:15:40.354847+00:00", "detail": {"brand": "hackfw", "changed": false, "last_success": "2026-09-26T02:10:01.226206+00:00", "bytes": 42714, "age_hours": 0.09, "window_hours": 1.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T13:57:06.086469+00:00", "held_seconds": 44314.3, "reported_by": "kevin-mac"}, {"surface": "cron:digest-tmb", "observation": "healthy", 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