OpenHarness is an open-source agent harness focused on clarity, hackability, and compatibility with Claude-style workflows.
- Fix bugs or tighten edge-case handling in the harness runtime.
- Improve docs, onboarding, examples, and architecture notes.
- Add tests for tools, permissions, plugins, MCP, or multi-agent flows.
- Contribute new skills, plugins, or provider compatibility improvements.
- Share real usage patterns that can be added to
docs/SHOWCASE.md.
git clone https://github.com/HKUDS/OpenHarness.git
cd OpenHarness
uv sync --extra devIf you want to work on the React terminal UI as well:
cd frontend/terminal
npm ci
cd ../..Run the same core checks that CI runs before opening a PR:
uv run ruff check src tests scripts
uv run pytest -qFrontend sanity check:
cd frontend/terminal
npx tsc --noEmit- Keep PRs scoped. Small, reviewable changes merge faster than broad rewrites.
- Include the problem, the change, and how you verified it.
- Add or update tests when behavior changes.
- Update docs when CLI flags, workflows, or compatibility claims change.
- Add a short entry under
UnreleasedinCHANGELOG.mdfor user-visible changes. - If you are improving type coverage, feel free to run
uv run mypy src/openharness, but it is not yet a required green check for the whole repo.
Issue #7 surfaced several high-value docs needs. Useful contributions in that area include:
- README accuracy improvements and compatibility notes.
- Short, reproducible examples for common workflows.
- Showcase entries based on real usage rather than generic marketing claims.
- Contribution and maintenance docs that make the repo easier to navigate.
- Use the GitHub issue templates when possible.
- Include environment details, exact commands, and error output for bugs.
- For features, explain the concrete workflow gap and expected behavior.
- If the request is mostly documentation or maintenance related, say that explicitly so it can be scoped as a docs PR.