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CONTRIBUTING.md

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+# Contributing to Thermal Comfort
+Everybody is invited and welcome to contribute to Thermal Comfort.
+
+## Report bugs using Github's [issues](https://github.com/dolezsa/thermal_comfort/issues)
+We use GitHub issues to track public bugs. Report a bug by [opening a new issue](https://github.com/dolezsa/thermal_comfort/issues/new/choose).
+
+## Write bug reports with detail, background, and sample code
+
+**Great Bug Reports** tend to have:
+
+- A quick summary and/or background
+- Steps to reproduce
+  - Be specific!
+  - Give sample code if you can.
+- What you expected would happen
+- What actually happens
+- Notes (possibly including why you think this might be happening, or stuff you tried that didn't work)
+
+People *love* thorough bug reports. I'm not even kidding.
+
+## Pull Requests
+1. Fork the repo and create your branch from `master`.
+2. Make sure you have pre-commit installed and run `pre-commit install`.
+3. If you've added code that should be tested, add tests.
+4. If you've changed APIs, update the documentation.
+5. Ensure the [test suite](#test-suite) passes.
+6. Make sure your code [lints](#style-guideline).
+7. Issue that pull request!
+
+## Test Suite
+ 1. Setup local tests:
+```bash
+python -m venv venv
+source venv/bin/activate
+pip install -r requirements.test.txt
+```
+2. Run local tests:
+```bash
+source venv/bin/activate
+pytest
+```
+
+## Style Guideline
+We use [home assistants style guideline](https://developers.home-assistant.io/docs/development_guidelines).
+
+## Contributor Credits
+You can add yourself to [CREDITS.md](CREDITS.md) in your PR. Otherwise you will be added before our next release.