All notable changes to Zook are documented here. Format follows Keep a Changelog; this project adheres to Semantic Versioning.

[Unreleased]

Added

• CLI: deploy, rollback, status, releases, list, logs.
• Docker Compose runtime with health-gated deploys (up -d --wait).
• Preflight that refuses to deploy stacks whose active services lack a healthcheck.
• Automatic, health-gated rollback on failed deploys; halts for manual intervention when a rollback also fails.
• Per-stack release state (.zook/state.json) and per-deploy logs.
• Native/systemd runtime: deploy prebuilt binaries via release directories, a current symlink, and systemctl restart, with zook-managed health polling.
• zook.yaml per-stack config: selects the runtime (docker default, or native) and sets overrides (health_timeout, rollback_on_fail).
• HTTP/command health prober used by the native runtime.
• HTTP artifact fetcher (.tar.gz or single binary) for native releases.
• RUNTIME column in zook list and zook status.