Use an engineering framework to help AI write code that follows your team's standards and project requirements.
From the README
Documentation ↗Excerpts from the project README on GitHub. Copyright and licensing remain with the respective authors.
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Trellis has 14.3k stars on GitHub. It has been forked 799 times. Trellis is written mainly in TypeScript. It has been in active development since 2026. Trellis is available under the AGPL-3.0 license. Its main topics are agentic-coding, ai-workflow, claudecode, codex.
What is Trellis?
The best agent harness.
Is Trellis open source?
Trellis is an open-source project. It is released under the AGPL-3.0 license.
Is Trellis free?
Yes. Trellis is free and open source — you can use, modify and self-host it. Its AGPL-3.0 license is a strong copyleft: if you distribute a modified version — including offering it as a network service — your changes must be released under the same license.
What license does Trellis use?
Trellis is available under the AGPL-3.0 license.
What language is Trellis written in?
Trellis is written mainly in TypeScript.
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