What this is. Synthetic health canary for the ATAC compliance dashboard + operator console. A Lambda fires every 3 hours via EventBridge, hits each API endpoint and SPA load path, asserts the shape, writes results here. A separate Claude scheduled task fires at the same cadence — when this page shows red, it investigates + fixes within a deny-list-bounded scope. Two-consecutive-fail debounce prevents single-shot blips from paging.

Color key. Green = pass. Yellow = warn (degraded but functional). Red = fail. Dark gray = canary didn't run in that hour (laptop/lambda was off, or pre-launch). Cell height encodes latency: full-height = ≥95th-percentile slow, shorter = faster. Click any cell to open the raw snapshot JSON for that run.

Where the data lives. Lambda runner: atac-canary-runner in us-east-1. Results: s3://atac-canary-status-941265043296-us-east-1/results.json. History: DDB atac-canary-history (90-day TTL). Pages: SNS atac-canary-alerts.