diff --git a/.gitignore b/.gitignore
index 7beed34..f03f1e7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,6 @@ docs/
 /Meta/
 .DS_Store
 /.quarto/
+
+# SDD working artifacts (ledger, briefs, review packages) — plans/ stays tracked
+.superpowers/sdd/