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README.md
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# claude-code-routine-trigger-worker
Cloudflare Worker that fires a [Claude Code routine](https://code.claude.com/docs/en/routines) on a precise cron schedule via the [`/fire` API](https://platform.claude.com/docs/en/api/claude-code/routines-fire). Runs on Cloudflare's free tier — no servers, no GitHub minutes, no Docker host.
> [!TIP]
> **Anthropic's routine editor now ships a built-in cron trigger** — it runs on Anthropic's infra, no setup. Use it first.
>
> This worker is for users who want self-hosted-like control without operating their own infra: secrets in CF, logs in CF, schedule in code review.
## Why this vs the siblings
| | [claude-code-routine-trigger](https://github.com/tiennm99/claude-code-routine-trigger) | [claude-code-routine-cron](https://github.com/tiennm99/claude-code-routine-cron) | **claude-code-routine-trigger-worker** (this) |
| ---------------- | -------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------- | --------------------------------------------- |
| Runs on | GitHub Actions runners | your infra (Docker host, k8s, NAS, RPi) | Cloudflare edge |
| Cost | free (within GitHub minutes) | minimal (your infra) | free (CF free tier) |
| Cron precision | ±30 min – 2 h, can drop runs | sub-second | within ~15 sec |
| Setup | fork + 2 repo secrets | env vars + Docker | `wrangler deploy` + 2 secrets |
| Audit trail | GitHub Actions runs page | container stdout | CF dashboard / `wrangler tail` |
## Quickstart
```bash
git clone https://github.com/tiennm99/claude-code-routine-trigger-worker
cd claude-code-routine-trigger-worker
npm install
# Upload secrets (from Anthropic routine editor → API trigger)
echo -n 'https://api.anthropic.com/v1/claude_code/routines/trig_.../fire' \
| npx wrangler secret put ROUTINE_FIRE_URL
echo -n 'sk-ant-oat01-...' \
| npx wrangler secret put ROUTINE_FIRE_TOKEN
# Edit the cron schedule and timezone in wrangler.toml, then:
npx wrangler deploy
```
Tail logs:
```bash
npx wrangler tail
```
A successful fire logs a JSON line with `session_url`. Open it to watch the run.
## Environment variables
Configured in `wrangler.toml` (`[vars]` for plain values) or via `wrangler secret put` (for secrets).
| Name | Type | Required | Default | Notes |
| -------------------- | ------ | :------: | ---------------------------------------- | ----- |
| `ROUTINE_FIRE_URL` | secret | yes | — | Anthropic `/fire` endpoint. From routine editor → API trigger. |
| `ROUTINE_FIRE_TOKEN` | secret | yes | — | `sk-ant-oat01-...` per-routine token. Shown once in the editor. |
| `TEXT_TEMPLATE` | var | no | `Scheduled trigger at {LocalTime}` | Token-substitution template. See *Templates*. |
| `TZ` | var | no | `UTC` | IANA tz name (`Asia/Ho_Chi_Minh`, `America/New_York`, …). Used for `{LocalTime}` formatting. |
## Customize the schedule
Edit `wrangler.toml` `[triggers].crons` — Cloudflare requires literal cron expressions (same constraint as GitHub Actions). To change when the routine fires:
```toml
[triggers]
crons = [
"7 17 * * *", # 00:07 UTC+7
"13 22 * * *", # 05:13 UTC+7
# add / remove / edit these lines as needed
]
```
Then redeploy: `npx wrangler deploy`.
Tips:
- Cron runs in **UTC**. Convert your local time: `UTC = local − offset` (e.g. 09:00 UTC+7 → 02:00 UTC → `0 2 * * *`).
- Validate expressions at <https://crontab.guru/>.
- **Free tier limit:** 5 cron expressions per worker. Default config uses all 5. To run more schedules, deploy another worker.
- Scattering minutes (e.g. `7`, `13`, `19`, `23`, `37`) is good hygiene on shared infrastructure even though CF cron is more reliable than GitHub.
## Templates
`TEXT_TEMPLATE` supports these `{Token}` substitutions, rendered per fire. Unknown tokens are left intact in the output.
| Token | Example |
| ------------- | -------------------------------------- |
| `{ISO}` | `2026-05-09T03:19:00.000Z` |
| `{LocalTime}` | `2026-05-09 10:19 GMT+7` |
| `{Cron}` | `19 3 * * *` — the expression that fired |
Example:
```toml
[vars]
TEXT_TEMPLATE = "Daily digest at {LocalTime} (cron {Cron})"
TZ = "America/New_York"
```
## Local development
Copy `.dev.vars.example` to `.dev.vars` and fill in your routine credentials:
```bash
cp .dev.vars.example .dev.vars
# edit .dev.vars
npx wrangler dev --test-scheduled
```
Then trigger a scheduled run:
```bash
curl "http://localhost:8787/__scheduled?cron=*+*+*+*+*"
```
`.dev.vars` is gitignored — never commit it.
## Tests
```bash
npm test
```
Vitest runs in the Workers runtime via `@cloudflare/vitest-pool-workers`. Tests mock `fetch`, so they consume no Anthropic quota.
## Secret rotation
`wrangler secret put` overwrites silently. Rotate by re-running it with the new value:
```bash
echo -n 'sk-ant-oat01-newvalue' | npx wrangler secret put ROUTINE_FIRE_TOKEN
```
The change takes effect on the next deploy or within a few seconds via the live config.
## Beta header
The request pins `anthropic-beta: experimental-cc-routine-2026-04-01` (constant in `worker.js`). When Anthropic ships a new dated beta, bump it via a release. Older dated values keep working for a transition window per Anthropic's beta policy.
## Operational notes
- **Time accuracy**: cron precision on CF Workers is within ~15 seconds — adequate for routine triggering.
- **No retry**: each `/fire` POST creates a new Claude Code session — retrying multiplies sessions and burns quota. The worker logs failures and moves on.
- **Logs**: `wrangler tail` streams live; CF dashboard's "Logs" tab persists them per the observability tier.
- **Cost**: scheduled handlers count against the Workers Free plan's 100k requests/day budget. 5 daily fires × 30 days = 150 requests/month — negligible.
## Security
- The token is **per-routine**: a leak only fires that one routine.
- Secrets live in CF's encrypted secret store, never in the bundle, never in logs (verified by tests).
- TLS to `api.anthropic.com` uses CF's standard cert verification.
- `worker.js` has no `fetch` HTTP handler — the worker is unreachable from the public internet, only fires on cron tick.
## License
[Apache-2.0](./LICENSE)
package-lock.json
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{
"name": "claude-code-routine-trigger-worker",
"version": "0.0.0",
"description": "Cloudflare Workers cron port of claude-code-routine-cron — fires Claude Code routines on a schedule.",
"type": "module",
"private": true,
"license": "Apache-2.0",
"main": "worker.js",
"scripts": {
"dev": "wrangler dev",
"deploy": "wrangler deploy",
"test": "vitest run"
},
"devDependencies": {
"wrangler": "^4.0.0",
"vitest": "^2.0.0",
"@cloudflare/vitest-pool-workers": "^0.5.0"
}
}