diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8aefd7ca..8be1b4db 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -10,12 +10,17 @@ We want to make it easy for you to contribute to OpenCode. Here are the most com
 - Missing standard behavior
 - Documentation improvements
 
+However, any UI or core product feature must go through a design review with the core team before implementation.
+
 If you are unsure if a PR would be accepted, feel free to ask a maintainer or look for issues with any of the following labels:
 
 - [`help wanted`](https://github.com/sst/opencode/issues?q=is%3Aissue%20state%3Aopen%20label%3Ahelp-wanted)
 - [`good first issue`](https://github.com/sst/opencode/issues?q=is%3Aissue%20state%3Aopen%20label%3A%22good%20first%20issue%22)
 - [`bug`](https://github.com/sst/opencode/issues?q=is%3Aissue%20state%3Aopen%20label%3Abug)
 
+> [!NOTE]
+> PRs that ignore these guardrails will likely be closed.
+
 Want to take on an issue? Leave a comment and a maintainer may assign it to you unless it is something we are already working on.
 
 ## Developing OpenCode