CronLord

A visual, self-hosted cron scheduler in a single Crystal binary.

One static executable. Web UI, REST API, scheduler, reference worker, and audit trail in one process. Editorial design, SQLite-backed, ~15 MB resident idle.

Install

git clone https://github.com/kdairatchi/CronLord
cd CronLord
shards install
shards build --release
./bin/cronlord server

Open http://localhost:7070.

Features (v0.3.0)

• Tickless scheduler with cron + macro expressions (@hourly, @daily, etc.) and per-job IANA timezones (DST-correct).
• Three job kinds: shell, http, claude (prompt → claude -p).
• Remote workers over HMAC-signed HTTP; reference worker ships in the same binary (cronlord worker run).
• Generic webhook + Slack (https://hooks.slack.com/…) notification channels on every finish.
• Per-run log capture with SSE tailing in the browser.
• REST API + Prometheus /metrics + audit trail at /audit.
• Hardened systemd unit and Alpine Docker image in contrib/ and Dockerfile; GitHub Actions CI + release workflows under .github/.

Documentation

Full docs under docs/: getting started · job kinds · API · deployment · architecture · comparison.

License

MIT