# Contributing The canonical contributing guide lives at the repo root: **[CONTRIBUTING.md](../CONTRIBUTING.md)**. This file exists only because GitHub will look for `.github/CONTRIBUTING.md` when surfacing the contributing prompt to new issue / PR authors. The root file is the source of truth. For the multi-harness style guide (Claude Code · OpenAI Codex CLI · Cursor · OpenCode · Gemini CLI), see [`docs/authoring.md`](../docs/authoring.md).