diff --git a/.gitignore b/.gitignore
index cabcf58f..6213b63c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -58,3 +58,6 @@ lib/
 # Session working notes — never stage (pending.md's own hard rule; R2-12/U-4)
 /pending.md
 /current.md
+
+# Subagent-driven-development git worktrees
+.worktrees/