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+# Contributing to Theatre.js
+
+>`@todo` Write the contribution guide.
+
+## Commit messages
+
+Our commit message format is as follows:
+
+```
+[Tag]: Short description (fixes #1234)
+
+Longer description here if necessary
+```
+
+The first line of the commit message (the summary) must have a specific format. This format is checked by our build tools.
+
+The `[Tag]` is one of the following:
+
+* `Fix` - for a bug fix.
+* `Update` - either for a backwards-compatible enhancement or for a rule change that adds reported problems.
+* `New` - implemented a new feature.
+* `Breaking` - for a backwards-incompatible enhancement or feature.
+* `Docs` - changes to documentation only.
+* `Build` - changes to build process only.
+* `Upgrade` - for a dependency upgrade.
+* `Chore` - for refactoring, adding tests, etc. (anything that isn't user-facing).
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