Darrow is a marketplace of focused, eval-tested plugins for Codex and Claude Code. It is for developers who want repeatable Git, review, planning, and implementation skills while choosing what to adopt.
Install one plugin at a time. Capabilities match your request; orchestration starts only when explicitly invoked and uses a host-native execution owner.
Disclaimer: Codex is the primary development host; Claude Code support is best-effort.
Darrow is actively developed; check host requirements and verification limits before installing or updating.
Try the read-only readiness tutorial: install one plugin, assess a small request, and inspect its verdict without editing code. The installation guide covers each host, updates, removal, verification, and recovery.
Open this checkout in a fresh session and ask “What is Darrow?” Use
$darrow-guide in Codex or /darrow-guide in Claude Code to invoke it explicitly.
It reads repository sources and explains them; it does not install or run work.
Prefer browsing? The documentation hub works without an agent.
Foundations, capabilities, orchestration, task recipes, and planned automation describe responsibilities, not a mandatory sequence.
Read the diagram's equivalent text description.
Use the intent-first catalog, then read the selected plugin's prerequisites, examples, and safety boundaries.
Foundations · Capabilities · Orchestration · Task recipes
Design principles and layer contracts explain ownership and architectural choices. For problems, start with troubleshooting.
Contributing covers development and checks. Go deeper through specifications, accepted decisions, and research.
Acknowledgements credit the projects and people behind Darrow's ideas.
Darrow is source-available under the Business Source License 1.1, with the Mozilla Public License 2.0 as the Change License. Each released version becomes MPL-2.0 two years after it is published.
In short: free for internal use, client work, research, personal projects, and teaching without commercial interest. Commercial education and offering Darrow's functionality as a product or service require a commercial license.
The standard BSL terms permit copying, modification, redistribution, and all non-production use.
Additional production use that is free, without asking:
- Use Darrow within your own organization for purposes other than commercial education.
- Use it in client work that is not commercial education.
- Use it to teach third parties, run workshops or courses, give talks or presentations, and publish blog posts or articles when the activity has no commercial interest.
- Use it in research, evaluation, and personal projects.
Not included in the free production-use grant:
- Use Darrow in education with a commercial interest, whether the audience is inside or outside your organization. That includes compensation or sponsorship, bundling with or promoting paid offerings, lead generation, and other direct or indirect commercial benefits.
- Offer Darrow, or a derivative of it, to third parties as a product or service whose principal value is Darrow's functionality.
Under the BSL terms, production use outside the Additional Use Grant requires you to purchase a commercial license or refrain from that use. For commercial licensing, contact bjoern@bjro.de.
Production-use grants are version-specific. Earlier versions remain available under the Additional Use Grant distributed with those versions.
Contributions are accepted under Apache-2.0 plus a relicensing grant; see CONTRIBUTING.md.