add link to design doc wiki page (#127442)
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index cf1c28e..1d73e48 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -121,6 +121,7 @@
5. [Flutter design doc template](https://flutter.dev/go/template),
which should be used when proposing a new technical design. This is a good
practice to do before coding more intricate changes.
+ See also our [guidance for writing design docs](https://github.com/flutter/flutter/wiki/Design-Documents).
[](https://www.youtube.com/watch?v=4yBgOBAOx_A)