# CFDM health-probe Worker

Edge probe for CFDM. **Not** Cloudflare Health Checks API (unavailable on Free).

Production: CFDM creates this Worker via the Cloudflare API (KV mailbox + Cron Trigger).
You do not need `wrangler deploy`. Token needs **Account**: Workers Scripts Write and Workers KV Storage Write.

Local debug:

```powershell
cd workers/health-probe
npx wrangler dev
```

Worker reads KV `targets`, probes TCP (`cloudflare:sockets` + `opened`) or HTTP (`fetch` to IP + `Host`), writes KV `results`. Batch ≤ 48, concurrency 5.

`GET /` — liveness.