diff --git a/docs/writing-agents.md b/docs/writing-agents.md
index 602d584..065456c 100644
--- a/docs/writing-agents.md
+++ b/docs/writing-agents.md
@@ -577,6 +577,7 @@ Improve based on usage:
 - [ ] Name follows kebab-case convention
 - [ ] Agent has a clear, recognizable role
 - [ ] Skills list is deliberate (not too many, not too few)
+- [ ] Model selection is deliberate (not just `inherit` by default)
 - [ ] Capabilities are specific and achievable
 - [ ] "When to Use" guidance is clear
 - [ ] Behavioral rules prevent problems