diff --git a/.prettierignore b/.prettierignore
index 50482156..e21dc216 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -26,3 +26,6 @@ focus-shims.d.ts
 **/focus-shims.d.ts
 tsconfig.focus.json
 **/tsconfig.focus.json
+
+# SDD scratch workspace (git-ignored controller artifacts)
+.superpowers/