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+Contributing to Rerex
+=====================
+
+Feel free to tinker with Rerex, I tried to make the code as easy to follow as I
+could while preserving the minimalist spirit of it.  Implementing character
+sets and escapes and so on have made things a little bit hairier than a
+textbook example, but hopefully it is still easy to digest.
+
+If you want to make a contribution, feel free to send patches, but note that I
+would like to preserve the cleanliness avoid bloating things too much, so I may
+not accept patches for features that are too complicated.  Bug fixes or other
+improvements to the code are, of course, most welcome.
+
+That said, this is, of course, free software, so you're free to take it and do
+as you please.  I'd be happy to chat about it, these are just guidelines for
+what I feel would be appropriate for inclusion in the project.
+
+Happy hacking.
+
+Tooling
+-------
+
+All of the code is machine formatted, the style is defined by the included
+`clang-format` configuration.  You can use `ninja clang-format` to format
+everything.
+
+Configuring with `-Dstrict=true` will enable the ultra-strict warnings that are
+run on CI (nearly all of them).  Configuring with `-Dwerror=true` will make
+them errors.
+
+A `clang-tidy` configuration is included for more intensive static checking,
+you can run all the checks with `ninja clang-tidy`.