- mypy.ini parses again (multi-line exclude and inline value comments made mypy reject the file); the mypy pre-commit hook is manual-only until the ~500 existing errors in src/ are paid down, and CONTRIBUTING says so - .gitignore: ignore all of config/ except the templates (ytm_auth.json and others weren't ignored) - .gitattributes: LF for .sh and .service - claude-code-review: skip fork PRs, which have no secrets - check_system_compatibility.sh: 3.13 supported, <3.10 an error - docs/scripts drift: emulator guide, README API Metrics, route count, docs index, scripts README; pyflakes nits in dev scripts Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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Contributing to LEDMatrix
Thanks for considering a contribution! LEDMatrix is built with help from the community and we welcome bug reports, plugins, documentation improvements, and code changes.
Quick links
- Bugs / feature requests: open an issue using one of the templates
in
.github/ISSUE_TEMPLATE/. - Real-time discussion: the LEDMatrix Discord.
- Plugin development:
docs/PLUGIN_DEVELOPMENT_GUIDE.mdand theledmatrix-pluginsrepository. - Security issues: see
SECURITY.md. Please don't open public issues for vulnerabilities.
Setting up a development environment
- Clone with submodules:
git clone --recurse-submodules https://github.com/ChuckBuilds/LEDMatrix.git cd LEDMatrix - For development without hardware, run the dev preview server:
See
python3 scripts/dev_server.py # then open http://localhost:5001docs/DEV_PREVIEW.mdfor details. - To run the full display in emulator mode:
EMULATOR=true python3 run.py - To target real hardware on a Raspberry Pi, follow the install
instructions in the root
README.md.
Running the tests
pip install -r requirements.txt -r requirements-test.txt
pytest
See docs/HOW_TO_RUN_TESTS.md for details
on test markers, the per-plugin tests, and the web-interface
integration tests.
Submitting changes
- Open an issue first for non-trivial changes. This avoids wasted work on PRs that don't fit the project direction.
- Create a topic branch off
main:feat/<short-description>,fix/<short-description>,docs/<short-description>. - Keep PRs focused. One conceptual change per PR. If you find adjacent bugs while working, fix them in a separate PR.
- Follow the existing code style. The pre-commit hooks run
flake8(E9, F63, F7, F82 plus bugbearBchecks),bandit, andgitleaks— install the CLI withpython -m pip install pre-commit, then runpre-commit installso they run on every commit.mypyonsrc/is a manual hook while existing type errors are paid down (pre-commit run mypy --hook-stage manual): please don't add new errors in the files you touch. HTML/JS inweb_interface/follows the patterns already intemplates/v3/andstatic/v3/. - Update documentation alongside code changes. If you add a
config key, document it in the relevant
*.mdfile (or, for plugins, inconfig_schema.jsonso the form is auto-generated). - Run the tests locally before opening the PR.
- Use the PR template —
.github/PULL_REQUEST_TEMPLATE.mdwill prompt you for what we need.
Commit message convention
Conventional Commits is encouraged but not strictly enforced:
feat: add NHL playoff bracket displayfix(plugin-loader): handle missing class_name in manifestdocs: correct web UI port in TROUBLESHOOTING.mdrefactor(cache): consolidate strategy lookup
Keep the subject under 72 characters; put the why in the body.
Contributing a plugin
LEDMatrix plugins live in their own repository:
ledmatrix-plugins.
Plugin contributions go through that repo's
SUBMISSION.md
process. The
hello-world plugin
is the canonical starter template.
Reviewing pull requests
Maintainer review is by @ChuckBuilds. Community review is welcome on any open PR — leave constructive comments, test on your hardware if applicable, and call out anything unclear.
Code of conduct
This project follows the Contributor Covenant. By participating you agree to abide by its terms.
License
LEDMatrix is licensed under the GNU General Public License v3.0 or later. By submitting a contribution you agree to license it under the same terms (the standard "inbound = outbound" rule that GitHub applies by default).
LEDMatrix builds on
rpi-rgb-led-matrix,
which is GPL-2.0-or-later. The "or later" clause makes it compatible
with GPL-3.0 distribution.