{"surfaces": [{"surface": "host:disk/", "observation": "healthy", "method": "local_artifact", "summary": "755.7GB free, not shrinking", "source": "statvfs:/", "read_at": "2026-09-28T08:34:12.724458+00:00", "detail": {"free_bytes": 811478913024, "free_gb": 755.75, "total_gb": 755.75, "pct_free": 100.0, "floor_gb": 5.0, "samples": 143, "slope_gb_per_day": 0.0, "runway_days": null}, "held_since": "2026-09-28T08:34:12.724458+00:00", "held_seconds": 0.0}, {"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 554s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-09-28T08:34:11.447845+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-09-28T08:24:57.669435+00:00", "silent_for_seconds": 553.8, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-09-28T08:34:11.447845+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "healthy", "method": "reported", "summary": "83.1GB free, 185 days of runway", "source": "statvfs:/", "read_at": "2026-09-28T08:24:57.468022+00:00", "detail": {"floor_gb": 5.0, "free_bytes": 89192906752, "pct_free": 36.39, "free_gb": 83.07, "runway_days": 185.1, "slope_gb_per_day": -0.422, "total_gb": 228.27, "samples": 2011, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T20:11:19.134511+00:00", "held_seconds": 44018.3, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 21.4h ago", "source": "brief-send-log.jsonl", "read_at": "2026-09-28T08:24:57.468092+00:00", "detail": {"row_count": 48, "window_hours": 30.0, "last_send_at": "2026-09-27T11:01:25.939225+00:00", "age_hours": 21.39, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T20:11:19.134978+00:00", "held_seconds": 44018.3, "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": "2026-09-28T08:24:57.468136+00:00", "detail": {"window_hours": 1.0, "last_success": "2026-09-28T08:20:01.239137+00:00", "age_hours": 0.08, "withheld": ["collector_id", "counts", "received_at", "reported_method", "skipped", "wire_row_id"]}, "held_since": "2026-09-27T20:11:19.135189+00:00", "held_seconds": 44018.3, "reported_by": "kevin-mac"}, {"surface": "backup:baserow", "observation": "healthy", "method": "reported", "summary": "backup 0.4h old (31 retained)", "source": "infra-baserow-1:/baserow/backups", "read_at": "2026-09-28T08:24:57.535016+00:00", "detail": {"window_hours": 26.0, "backup_count": 31, "age_hours": 0.42, "newest_at": "2026-09-28T08:00:00+00:00", "newest": "baserow_backup_20260928_030000.tar.gz", "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T20:11:19.207310+00:00", "held_seconds": 44018.3, "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": "2026-09-28T08:24:57.535139+00:00", "detail": {"window_hours": 1.5, "last_success": "2026-09-28T08:07:11.885559+00:00", "age_hours": 0.3, "invoked_by": "interactive", "alarm": true, "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-09-27T20:11:19.207852+00:00", "held_seconds": 44018.3, "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": "2026-09-28T08:24:57.535188+00:00", "detail": {"http_code": 200, "last_success": "2026-09-28T08:22:08+00:00", "age_hours": 0.05, "window_hours": 0.5, "withheld": ["collector_id", "probe", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T20:11:19.208060+00:00", "held_seconds": 44018.3, "reported_by": "kevin-mac"}, {"surface": "cron:kai-cadence", "observation": "healthy", "method": "reported", "summary": "last success 15.9h ago", "source": "kai-cadence-heartbeat.json", "read_at": "2026-09-28T08:24:57.535228+00:00", "detail": {"window_hours": 26.0, "last_success": "2026-09-27T16:30:07.942609+00:00", "age_hours": 15.91, "outcome": "posted", "invoked_by": "cadence", "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T20:11:19.208567+00:00", "held_seconds": 44018.3, "reported_by": "kevin-mac"}, {"surface": "cron:devpost", "observation": "healthy", "method": "reported", "summary": "last success 3.8h ago", "source": "devpost-heartbeat.json", "read_at": "2026-09-28T08:24:57.535270+00:00", "detail": {"window_hours": 26.0, "last_success": "2026-09-28T04:37:01.437775+00:00", "age_hours": 3.8, "withheld": ["collector_id", "hb_source", "received_at", "reported_method", "row", "wire_row_id"]}, "held_since": "2026-09-27T20:11:19.208780+00:00", "held_seconds": 44018.3, "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": "2026-09-28T08:24:57.535319+00:00", "detail": {"window_hours": 1.0, "brand": "hackfw", "age_hours": 0.08, "last_success": "2026-09-28T08:20:01.052349+00:00", "bytes": 42714, "changed": false, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T20:11:19.208965+00:00", "held_seconds": 44018.3, "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": "2026-09-28T08:24:57.535357+00:00", "detail": {"window_hours": 1.0, "brand": "tmb", "age_hours": 0.08, "last_success": "2026-09-28T08:20:01.153311+00:00", "bytes": 37973, "changed": false, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T20:11:19.209102+00:00", "held_seconds": 44018.3, "reported_by": "kevin-mac"}, {"surface": "cron:digest-fwdao", "observation": "healthy", "method": "reported", "summary": "last success 0.1h ago", "source": "fwdao-index.html.heartbeat.json", "read_at": "2026-09-28T08:24:57.535393+00:00", "detail": {"window_hours": 1.0, "brand": "fwdao", "age_hours": 0.08, "last_success": "2026-09-28T08:20:01.280758+00:00", "bytes": 53974, "changed": false, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T20:11:19.209238+00:00", "held_seconds": 44018.3, "reported_by": "kevin-mac"}, {"surface": "cron:door", "observation": "healthy", "method": "reported", 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