diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
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+# Contributor Covenant Code of Conduct
+
+This project follows the [Contributor Covenant v2.1](https://www.contributor-covenant.org/version/2/1/code_of_conduct/).
+
+By participating, you agree to uphold this code. Report unacceptable behavior to [kevin.jahns@protonmail.com](mailto:kevin.jahns@protonmail.com).
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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+# Contributing
+
+1. **Open an issue first.** Discuss your idea or bug report before writing code.
+2. **Submit a PR** that references the issue.
+3. **Include tests.** Every PR must include tests covering the change. Test-only PRs are welcome too.
+
+Yjs is free to use, but not free to maintain. Companies that rely on Yjs are expected to support the project — through [sponsorship](https://github.com/sponsors/dmonad), contributions, or both — if they want issues, bug reports, and PRs addressed.
+
+Every contribution becomes maintenance work for the project maintainers. Priority is given to features that serve the project's financial supporters. Other contributions may not be accepted solely for this reason.