Update README.md

keyvi/README.md

@@ -35,3 +35,13 @@ Example:
 `<BUILD_TYPE>` can be `release`, `debug`, `coverage` or any other available by default in `cmake`
 
 To run cpp unit tests just execute `unit_test_all` executable.
+
+## Coding Rules
+
+The cpp part of keyvi has to pass the [https://pypi.python.org/pypi/cpplint](cpplint) checks as well as [https://clang.llvm.org/docs/ClangFormat.html](clang-format) (5.0.0 at the moment, defined by our travis CI configuration). 
+
+The configuration of both tools is part of the project. You can check your changes against the config using the `check-style.sh` script. For your convenience consider using a plugin for your IDE of choice (e.g. CppStyle for Eclipse).
+
+Formatting is not done automatically for you but code neads to be cleanly pushed. 
+
+The check must pass for all changed, including new, files.