Check Cloudflare Worker logs

Use this skill when you need to see what is happening inside the deployed Workers: request paths, response status, console.log output, and errors. Both the main site and the API are separate Cloudflare Workers.

When to use this skill

Debugging 401/500 from openagents.com or openagents.com/api.
Verifying that a Worker receives the expected headers (e.g. X-OA-Internal-Key) and why it might return "unauthorized".
Seeing console.log / console_error! output from the Rust API or the web app.
Correlating with Khala logs (Khala calls the API worker; tail the API worker while reproducing).

Workers in this repo

Worker	Config	Routes	Purpose
openagents-api	`apps/api/wrangler.toml`	`openagents.com/api/*`	Rust API: legacyparity, control, D1, R2, etc.
openagents-web-app	`apps/web/wrangler.jsonc`	`openagents.com` (main site)	TanStack/React app (Node compat).

Run wrangler tail from the app directory that contains that worker's config (or use --config / --cwd).

Wrangler tail (real-time only)

Cloudflare does not provide historical Worker logs via the CLI. You get a live stream of requests and logs. For historical data, use the dashboard: Workers & Pages → your worker → Logs / Real-time Logs or Logpush.

Basic usage

# API worker (Rust) — run from apps/api
cd apps/api
npx wrangler tail

# Web app worker — run from apps/web
cd apps/web
npx wrangler tail

Leave the command running, then reproduce the issue in the browser. You'll see each request, status, and any console output.

Tail options

Option	Meaning
`--format pretty`	Human-readable (default).
`--format json`	One JSON object per log line (e.g. pipe to `jq`).
`--status ok`	Only successful requests.
`--status error`	Only errors/failures.
`--method GET`	Filter by HTTP method.
`--search "legacyparity"`	Filter by text in console.log messages.
`--header "x-oa-internal-key"`	Filter by presence of header.
`--sampling-rate 1`	Log 100% of requests (default can sample).

Examples

# API worker: only errors, pretty
cd apps/api
npx wrangler tail --status error --format pretty

# API worker: JSON and filter by URL path with jq
cd apps/api
npx wrangler tail --format json | jq 'select(.url | contains("legacyparity"))'

# Web worker: tail while reproducing a page error
cd apps/web
npx wrangler tail

Two workers, two terminals

To see both the site and the API when debugging a flow (e.g. Hatchery calling Khala, Khala calling API):

Terminal 1: cd apps/api && npx wrangler tail --format pretty
Terminal 2: cd apps/web && npx wrangler tail --format pretty
Optional: Khala logs in a third terminal: cd apps/web && npx khala logs --prod --success

Then reproduce; watch for the request to the API worker and any console.log / diagnostic output.

Limitations

Real-time only: No --history; tail streams until you Ctrl+C.
Sampling: Under heavy load, tail may sample; use --sampling-rate 1 to reduce sampling.
Max 10 clients: Up to 10 concurrent tail sessions per worker.
Secrets: Logs must not print secrets; use lengths or "present/absent" in diagnostic logs.

Diagnostic logging (this repo)

For legacyparity auth, the API worker logs:

legacyparity auth: no internal key header path=... — request reached the worker but the X-OA-Internal-Key header was missing (e.g. stripped or not sent by Khala).
legacyparity auth 401: path=... provided_len=... expected_len=... — header was present but value didn’t match the worker secret (compare lengths; if equal, values differ).
legacyparity auth ok path=... key_len=... — internal key matched; request was authorized.

Use wrangler tail from apps/api while reproducing 401 to see which line appears. Khala actions log [legacyparityApi <label>] fetch key_len=<n> url=... before each request; correlate with worker logs to confirm what Khala sent vs what the worker received.

worker-logs