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.agents/skills/cloudflare-deploy/references/cron-triggers/README.md

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+# Cloudflare Cron Triggers
+
+Schedule Workers execution using cron expressions. Runs on Cloudflare's global network during underutilized periods.
+
+## Key Features
+
+- **UTC-only execution** - All schedules run on UTC time
+- **5-field cron syntax** - Quartz scheduler extensions (L, W, #)
+- **Global propagation** - 15min deployment delay
+- **At-least-once delivery** - Rare duplicate executions possible
+- **Workflow integration** - Trigger long-running multi-step tasks
+- **Green Compute** - Optional carbon-aware scheduling during low-carbon periods
+
+## Cron Syntax
+
+```
+ ┌─────────── minute (0-59)
+ │ ┌───────── hour (0-23)
+ │ │ ┌─────── day of month (1-31)
+ │ │ │ ┌───── month (1-12, JAN-DEC)
+ │ │ │ │ ┌─── day of week (1-7, SUN-SAT, 1=Sunday)
+ * * * * *
+```
+
+**Special chars:** `*` (any), `,` (list), `-` (range), `/` (step), `L` (last), `W` (weekday), `#` (nth)
+
+## Common Schedules
+
+```bash
+*/5 * * * *        # Every 5 minutes
+0 * * * *          # Hourly
+0 2 * * *          # Daily 2am UTC (off-peak)
+0 9 * * MON-FRI    # Weekdays 9am UTC
+0 0 1 * *          # Monthly 1st midnight UTC
+0 9 L * *          # Last day of month 9am UTC
+0 10 * * MON#2     # 2nd Monday 10am UTC
+*/10 9-17 * * MON-FRI  # Every 10min, 9am-5pm weekdays
+```
+
+## Quick Start
+
+**wrangler.jsonc:**
+```jsonc
+{
+  "name": "my-cron-worker",
+  "triggers": {
+    "crons": ["*/5 * * * *", "0 2 * * *"]
+  }
+}
+```
+
+**Handler:**
+```typescript
+export default {
+  async scheduled(
+    controller: ScheduledController,
+    env: Env,
+    ctx: ExecutionContext,
+  ): Promise<void> {
+    console.log("Cron:", controller.cron);
+    console.log("Time:", new Date(controller.scheduledTime));
+    
+    ctx.waitUntil(asyncTask(env)); // Non-blocking
+  },
+};
+```
+
+**Test locally:**
+```bash
+npx wrangler dev
+curl "http://localhost:8787/__scheduled?cron=*/5+*+*+*+*"
+```
+
+## Limits
+
+- **Free:** 3 triggers/worker, 10ms CPU
+- **Paid:** Unlimited triggers, 50ms CPU
+- **Propagation:** 15min global deployment
+- **Timezone:** UTC only
+
+## Reading Order
+
+**New to cron triggers?** Start here:
+1. This README - Overview and quick start
+2. [configuration.md](./configuration.md) - Set up your first cron trigger
+3. [api.md](./api.md) - Understand the handler API
+4. [patterns.md](./patterns.md) - Common use cases and examples
+
+**Troubleshooting?** Jump to [gotchas.md](./gotchas.md)
+
+## In This Reference
+- [configuration.md](./configuration.md) - wrangler config, env-specific schedules, Green Compute
+- [api.md](./api.md) - ScheduledController, noRetry(), waitUntil, testing patterns
+- [patterns.md](./patterns.md) - Use cases, monitoring, queue integration, Durable Objects
+- [gotchas.md](./gotchas.md) - Timezone issues, idempotency, security, testing
+
+## See Also
+- [workflows](../workflows/) - Alternative for long-running scheduled tasks
+- [workers](../workers/) - Worker runtime documentation