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Convex Cron Jobs

A pattern library for setting up reliable, scalable scheduled functions (cron jobs) in Convex apps.

Dev & CodingIntermediate★ 406⑂ 33AI score 7/10Last updated: Sep 28, 2026

What it does

  • Generates scheduling code with crons.interval (seconds/minutes/hours) and crons.cron (cron expressions).
  • Shows how to write internal functions for crons, pass static args, and log runs to a cronLogs table.
  • Covers batching large datasets via paginate + ctx.scheduler.runAfter, and external API calls via internalAction.
  • Lists common pitfalls: calling public functions, UTC timezone confusion, deprecated helpers, missing error handling.

Who it's for

  • Developers building on Convex as a backend
  • Teams automating session cleanup, data sync, and daily/weekly reports
  • Engineers hardening production cron monitoring and logging

Examples

  1. "Add a cron that cleans up expired sessions hourly" → produces convex/crons.ts plus an internalMutation
  2. "Send a weekly summary every Monday at 9 AM UTC" → uses the 0 9 * * 1 expression
  3. "My cron times out on tens of thousands of rows" → refactors into 100-item batches with cursor re-scheduling

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/waynesutton/convexskills/HEAD/skills/convex-cron-jobs/SKILL.md

What I want: (describe your task here)

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↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

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Install the skill I found on Claude Skill Mart.
Copy the skills/convex-cron-jobs folder from the GitHub repo waynesutton/convexskills into my ~/.claude/skills/convex-cron-jobs/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/waynesutton/convexskills.git /tmp/convexskills && mkdir -p ~/.claude/skills && cp -r /tmp/convexskills/skills/convex-cron-jobs ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal and clone the repo: git clone https://github.com/waynesutton/convexskills.git
  2. Create the skills directory if needed: mkdir -p ~/.claude/skills
  3. Copy just this skill: cp -r convexskills/skills/convex-cron-jobs ~/.claude/skills/
  4. Verify that ~/.claude/skills/convex-cron-jobs/SKILL.md exists.
  5. Restart Claude Code and try a prompt like "set up a Convex cron job" to confirm it loads.
  6. Note: you need an actual Convex project (a convex/ directory and npx convex dev) to apply the generated code.
View source on GitHub ↗License: Apache-2.0