{"surfaces": [{"surface": "host:disk/", "observation": "healthy", "method": "local_artifact", "summary": "1001.9GB free, 85745409 days of runway", "source": "statvfs:/", "read_at": "2026-10-10T16:21:46.166599+00:00", "detail": {"free_bytes": 1075811184640, "free_gb": 1001.93, "total_gb": 1001.93, "pct_free": 100.0, "floor_gb": 5.0, "samples": 812, "slope_gb_per_day": -0.0, "runway_days": 85745409.1}, "held_since": "2026-10-10T16:21:46.166599+00:00", "held_seconds": 0.0}, {"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 388s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-10-10T16:21:44.554581+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-10-10T16:15:16.420464+00:00", "silent_for_seconds": 388.1, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-10-10T16:21:44.554581+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "healthy", "method": "reported", "summary": "53.1GB free, not shrinking", "source": "statvfs:/", "read_at": "2026-10-10T16:15:16.203868+00:00", "detail": {"runway_days": null, "free_bytes": 57061355520, "floor_gb": 5.0, "pct_free": 23.28, "free_gb": 53.14, "samples": 2011, "slope_gb_per_day": 1.226, "total_gb": 228.27, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-10T03:56:53.202322+00:00", "held_seconds": 44303.0, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 5.3h ago", "source": "brief-send-log.jsonl", "read_at": "2026-10-10T16:15:16.204353+00:00", "detail": {"row_count": 61, "age_hours": 5.25, "last_send_at": "2026-10-10T11:00:04.444077+00:00", "window_hours": 30.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-10T03:56:53.202872+00:00", "held_seconds": 44303.0, "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": "2026-10-10T16:15:16.204518+00:00", "detail": {"age_hours": 0.09, "last_success": "2026-10-10T16:10:01.309302+00:00", "window_hours": 1.0, "withheld": ["collector_id", "counts", "received_at", "reported_method", "skipped", "wire_row_id"]}, "held_since": "2026-10-10T03:56:53.203068+00:00", "held_seconds": 44303.0, "reported_by": "kevin-mac"}, {"surface": "backup:baserow", "observation": "healthy", "method": "reported", "summary": "backup 8.3h old (32 retained)", "source": "infra-baserow-1:/baserow/backups", "read_at": "2026-10-10T16:15:16.336756+00:00", "detail": {"age_hours": 8.25, "newest": "baserow_backup_20261010_030000.tar.gz", "newest_at": "2026-10-10T08:00:00+00:00", "backup_count": 32, "window_hours": 26.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-10T03:56:53.346147+00:00", "held_seconds": 44303.0, "reported_by": "kevin-mac"}, {"surface": "cron:comms-freshness", "observation": "healthy", "method": "reported", "summary": "last success 0.1h ago", "source": "comms-freshness-run.json", "read_at": "2026-10-10T16:15:16.337040+00:00", "detail": {"invoked_by": "interactive", "age_hours": 0.1, "alarm": true, "last_success": "2026-10-10T16:09:16.788918+00:00", "window_hours": 1.5, "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-10-10T03:56:53.346596+00:00", "held_seconds": 44303.0, "reported_by": "kevin-mac"}, {"surface": "service:staging-queue", "observation": "fault", "method": "reported", "summary": "no successful run in 21.3h (window 0.5h)", "source": "staging-queue-heartbeat.json", "read_at": "2026-10-10T16:15:16.337244+00:00", "detail": {"http_code": 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