{"surfaces": [{"surface": "host:disk/", "observation": "healthy", "method": "local_artifact", "summary": "1001.9GB free, 87270834 days of runway", "source": "statvfs:/", "read_at": "2026-10-10T20:12:43.962968+00:00", "detail": {"free_bytes": 1075811184640, "free_gb": 1001.93, "total_gb": 1001.93, "pct_free": 100.0, "floor_gb": 5.0, "samples": 846, "slope_gb_per_day": -0.0, "runway_days": 87270834.4}, "held_since": "2026-10-10T20:12:43.962968+00:00", "held_seconds": 0.0}, {"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 692s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-10-10T20:12:42.545150+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-10-10T20:01:10.855838+00:00", "silent_for_seconds": 691.7, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-10-10T20:12:42.545150+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "healthy", "method": "reported", "summary": "53.1GB free, not shrinking", "source": "statvfs:/", "read_at": "2026-10-10T20:01:10.558425+00:00", "detail": {"runway_days": null, "free_bytes": 57020604416, "floor_gb": 5.0, "pct_free": 23.26, "free_gb": 53.1, "samples": 2011, "slope_gb_per_day": 1.218, "total_gb": 228.27, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-10T07:42:52.001753+00:00", "held_seconds": 44298.6, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 9.0h ago", "source": "brief-send-log.jsonl", "read_at": "2026-10-10T20:01:10.558817+00:00", "detail": {"row_count": 61, "age_hours": 9.02, "last_send_at": "2026-10-10T11:00:04.444077+00:00", "window_hours": 30.0, "withheld": ["collector_id", "received_at", "reported_method", 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"window_hours": 26.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-10T07:42:52.152063+00:00", "held_seconds": 44298.5, "reported_by": "kevin-mac"}, {"surface": "cron:comms-freshness", "observation": "healthy", "method": "reported", "summary": "last success 0.4h ago", "source": "comms-freshness-run.json", "read_at": "2026-10-10T20:01:10.701073+00:00", "detail": {"invoked_by": "interactive", "age_hours": 0.36, "alarm": true, "last_success": "2026-10-10T19:39:17.981174+00:00", "window_hours": 1.5, "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-10-10T07:42:52.152477+00:00", "held_seconds": 44298.5, "reported_by": "kevin-mac"}, {"surface": "service:staging-queue", "observation": "fault", "method": "reported", "summary": "no successful run in 25.1h (window 0.5h)", "source": "staging-queue-heartbeat.json", "read_at": "2026-10-10T20:01:10.701451+00:00", "detail": {"http_code": 200, "age_hours": 25.07, "last_success": "2026-10-09T18:56:53+00:00", "window_hours": 0.5, "withheld": ["collector_id", "probe", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-10T07:42:52.152739+00:00", "held_seconds": 44298.5, "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": "2026-10-10T20:01:10.701778+00:00", "detail": {"invoked_by": "distributor", "age_hours": 6.01, "last_success": "2026-10-10T14:00:52.098934+00:00", "outcome": "posted", "window_hours": 26.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-10-10T07:42:52.152980+00:00", "held_seconds": 44298.5, "reported_by": "kevin-mac"}, {"surface": "cron:devpost", "observation": "healthy", "method": "reported", "summary": "last success 0.4h ago", "source": "devpost-heartbeat.json", "read_at": 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