{"surfaces": [{"surface": "host:disk/", "observation": "healthy", "method": "local_artifact", "summary": "755.7GB free, 6242557649 days of runway", "source": "statvfs:/", "read_at": "2026-09-25T22:00:41.616818+00:00", "detail": {"free_bytes": 811478810624, "free_gb": 755.75, "total_gb": 755.75, "pct_free": 100.0, "floor_gb": 5.0, "samples": 1303, "slope_gb_per_day": -0.0, "runway_days": 6242557648.7}, "held_since": "2026-09-25T22:00:41.616818+00:00", "held_seconds": 0.0}, {"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 77s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-09-25T22:00:40.263925+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-09-25T21:59:23.337250+00:00", "silent_for_seconds": 76.9, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-09-25T22:00:40.263925+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "healthy", "method": "reported", "summary": "22.9GB free, 23 days of runway", "source": "statvfs:/", "read_at": "2026-09-25T21:59:23.095362+00:00", "detail": {"pct_free": 10.04, "floor_gb": 5.0, "runway_days": 22.5, "free_gb": 22.91, "free_bytes": 24602202112, "slope_gb_per_day": -0.795, "total_gb": 228.27, "samples": 2011, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T21:44:19.265734+00:00", "held_seconds": 903.8, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 11.0h ago", "source": "brief-send-log.jsonl", "read_at": "2026-09-25T21:59:23.095837+00:00", "detail": {"last_send_at": "2026-09-25T11:01:08.923796+00:00", "row_count": 46, "age_hours": 10.97, "window_hours": 30.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T09:40:55.516765+00:00", "held_seconds": 44307.6, "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": "2026-09-25T21:59:23.096021+00:00", "detail": {"last_success": "2026-09-25T21:50:01.728726+00:00", "age_hours": 0.16, "window_hours": 1.0, "withheld": ["collector_id", "counts", "received_at", "reported_method", "skipped", "wire_row_id"]}, "held_since": "2026-09-25T09:40:55.517088+00:00", "held_seconds": 44307.6, "reported_by": "kevin-mac"}, {"surface": "backup:baserow", "observation": "healthy", "method": "reported", "summary": "backup 14.0h old (31 retained)", "source": "infra-baserow-1:/baserow/backups", "read_at": "2026-09-25T21:59:23.188469+00:00", "detail": {"newest_at": "2026-09-25T08:00:00+00:00", "age_hours": 13.99, "newest": "baserow_backup_20260925_030000.tar.gz", "backup_count": 31, 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"last_success": "2026-09-25T21:58:13+00:00", "age_hours": 0.02, "window_hours": 0.5, "withheld": ["collector_id", "probe", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T09:40:55.579430+00:00", "held_seconds": 44307.6, "reported_by": "kevin-mac"}, {"surface": "cron:kai-cadence", "observation": "healthy", "method": "reported", "summary": "last success 1.0h ago", "source": "kai-cadence-heartbeat.json", "read_at": "2026-09-25T21:59:23.189729+00:00", "detail": {"invoked_by": "cadence", "last_success": "2026-09-25T21:02:18.919736+00:00", "age_hours": 0.95, "outcome": "posted", "window_hours": 26.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T09:40:55.579713+00:00", "held_seconds": 44307.6, "reported_by": "kevin-mac"}, {"surface": "cron:devpost", "observation": "healthy", "method": "reported", "summary": "last success 0.4h ago", "source": "devpost-heartbeat.json", "read_at": "2026-09-25T21:59:23.189937+00:00", "detail": {"last_success": "2026-09-25T21:33:18.147607+00:00", "age_hours": 0.43, "window_hours": 26.0, "withheld": ["collector_id", "hb_source", "received_at", "reported_method", "row", "wire_row_id"]}, "held_since": "2026-09-25T09:40:55.579989+00:00", "held_seconds": 44307.6, "reported_by": "kevin-mac"}, {"surface": "cron:digest-hackfw", "observation": "healthy", "method": "reported", "summary": "last success 0.2h ago", "source": "index.html.heartbeat.json", "read_at": "2026-09-25T21:59:23.190146+00:00", "detail": {"brand": "hackfw", "changed": false, "last_success": "2026-09-25T21:50:01.556579+00:00", "bytes": 42714, "age_hours": 0.16, "window_hours": 1.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T09:40:55.580248+00:00", "held_seconds": 44307.6, "reported_by": "kevin-mac"}, {"surface": "cron:digest-tmb", "observation": "healthy", "method": "reported", "summary": "last success 0.2h 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