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+# Contributing to MAT2
+
+The main repository for MAT2 is on [0xacab]( https://0xacab.org/jvoisin/mat2 ),
+with a mirror on [gitlab.com]( https://gitlab.com/jvoisin/mat2 ).
+
+Do feel free to pick up [an issue]( https://0xacab.org/jvoisin/mat2/issues )
+and to send a pull-request. Please do check that everything is fine by running the
+testsuite with `python3 -m unittest discover -v` before submitting one :)
+
+# Doing a release
+
+1. Update the [changelog](https://0xacab.org/jvoisin/mat2/blob/master/CHANGELOG.md)
+2. Update the version in the [main.py](https://0xacab.org/jvoisin/mat2/blob/master/main.py) file
+3. Commit the changelog and the main.py file
+4. Create a tag with `git tag -s $VERSION`
+5. Push the tag with `git push --tags`