diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2b068f0..0e0b107 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -6,13 +6,22 @@ Before submitting a pull request, please ensure you have added/updated the appro
 
 #### Additional style rules ####
 
-* Comments follow [Google's style guide][goog-style-comments].
+* Docstrings are required for classes, attributes, methods, and functions.
+* Docstrings are [napolean-flavored][docstrings] so they look good from both
+the CLI and in RTD.
+* Format non-trivial comments using your GitHub nick and one of these prefixes:
+    * TODO(riker): Damage report!
+    * NOTE(riker): Well, that's certainly good to know.
+    * PERF(riker): Travel time to the nearest starbase?
+    * APPSEC(riker): In all trust, there is the possibility for betrayal.
 * Commit messages should be formatted using [AngularJS conventions][ajs] (one-liners are OK for now but body and footer may be required as the project matures).
 * When catching exceptions, name the variable `ex`.
 * Use whitespace to separate logical blocks of code and to improve readability.
 * No single-character variable names except for trivial indexes when looping,
 or in mathematical expressions implementing well-known formulas.
 * Heavily document code that is especially complex and/or clever.
+* When in doubt, optimize for readability.
 
 [ajs]: http://goo.gl/QpbS7
-[goog-style-comments]: http://google-styleguide.googlecode.com/svn/trunk/pyguide.html#Comments
+[docstrings]: http://sphinxcontrib-napoleon.readthedocs.org/en/latest/example_google.html#example-google-style-python-docstrings
+[goog-style]: http://google-styleguide.googlecode.com/svn/trunk/pyguide.html#Comments