diff --git a/skills/harness-engineering/SKILL.md b/skills/harness-engineering/SKILL.md
index 7dcaad85..305f51cb 100644
--- a/skills/harness-engineering/SKILL.md
+++ b/skills/harness-engineering/SKILL.md
@@ -217,11 +217,3 @@ Before finishing harness adoption work, verify:
   it was skipped
 - generated docs or indexes are refreshed
 - the final report names every command run and its result
-
-## Optional Reference
-
-The prompt-first workflow in
-`https://github.com/baskduf/harness-starter-kit` is a reference implementation
-of these ideas. Use it as reference material only when the user asks for it or
-when the repository already includes it. The target repository remains the
-source of truth.