{"surfaces": [{"surface": "host:disk/", "observation": "healthy", "method": "local_artifact", "summary": "755.7GB free, not shrinking", "source": "statvfs:/", "read_at": "2026-09-28T10:33:50.965508+00:00", "detail": {"free_bytes": 811478913024, "free_gb": 755.75, "total_gb": 755.75, "pct_free": 100.0, "floor_gb": 5.0, "samples": 161, "slope_gb_per_day": 0.0, "runway_days": null}, "held_since": "2026-09-28T10:33:50.965508+00:00", "held_seconds": 0.0}, {"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 499s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-09-28T10:33:49.043957+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-09-28T10:25:30.274171+00:00", "silent_for_seconds": 498.8, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-09-28T10:33:49.043957+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "healthy", "method": "reported", "summary": "83.0GB free, 217 days of runway", "source": "statvfs:/", "read_at": "2026-09-28T10:25:30.001565+00:00", "detail": {"floor_gb": 5.0, "free_bytes": 89172267008, "pct_free": 36.38, "free_gb": 83.05, "runway_days": 216.5, "slope_gb_per_day": -0.36, "total_gb": 228.27, "samples": 2011, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T22:07:24.380561+00:00", "held_seconds": 44285.6, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 23.4h ago", "source": "brief-send-log.jsonl", "read_at": "2026-09-28T10:25:30.001843+00:00", "detail": {"row_count": 48, "window_hours": 30.0, "last_send_at": "2026-09-27T11:01:25.939225+00:00", "age_hours": 23.4, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": 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["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T22:07:24.519327+00:00", "held_seconds": 44285.6, "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": "2026-09-28T10:25:30.145850+00:00", "detail": {"window_hours": 1.5, "last_success": "2026-09-28T10:07:12.738248+00:00", "age_hours": 0.3, "invoked_by": "interactive", "alarm": true, "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-09-27T22:07:24.519485+00:00", "held_seconds": 44285.6, "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": "2026-09-28T10:25:30.145913+00:00", "detail": {"http_code": 200, "last_success": "2026-09-28T10:22:10+00:00", "age_hours": 0.06, "window_hours": 0.5, "withheld": ["collector_id", "probe", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T22:07:24.519550+00:00", "held_seconds": 44285.6, "reported_by": "kevin-mac"}, {"surface": "cron:kai-cadence", "observation": "healthy", "method": "reported", "summary": "last success 17.9h ago", "source": "kai-cadence-heartbeat.json", "read_at": "2026-09-28T10:25:30.146119+00:00", "detail": {"window_hours": 26.0, "last_success": "2026-09-27T16:30:07.942609+00:00", "age_hours": 17.92, "outcome": "posted", "invoked_by": "cadence", "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T22:07:24.519593+00:00", "held_seconds": 44285.6, "reported_by": "kevin-mac"}, {"surface": "cron:devpost", "observation": "healthy", "method": "reported", "summary": "last success 5.8h ago", "source": "devpost-heartbeat.json", "read_at": "2026-09-28T10:25:30.146309+00:00", "detail": {"window_hours": 26.0, "last_success": "2026-09-28T04:37:01.437775+00:00", "age_hours": 5.81, "withheld": ["collector_id", "hb_source", "received_at", "reported_method", "row", "wire_row_id"]}, "held_since": "2026-09-27T22:07:24.519638+00:00", "held_seconds": 44285.6, "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": "2026-09-28T10:25:30.146496+00:00", "detail": {"window_hours": 1.0, "brand": "hackfw", "age_hours": 0.09, "last_success": "2026-09-28T10:20:00.882951+00:00", "bytes": 42714, "changed": false, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T22:07:24.519696+00:00", "held_seconds": 44285.6, "reported_by": "kevin-mac"}, {"surface": "cron:digest-tmb", "observation": "healthy", "method": "reported", "summary": "last success 0.1h ago", "source": "tmb-index.html.heartbeat.json", "read_at": 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