diff --git a/.gitignore b/.gitignore
index 9bd7756..18c2413 100644
--- a/.gitignore
+++ b/.gitignore
@@ -63,6 +63,14 @@ __pycache__/
 *.bak
 *.orig
 
+# Claude Code worktrees. `git worktree add` with a relative path creates the
+# new checkout inside whichever worktree is current, so without this an entire
+# second copy of the repository — carrying its own .claude/worktrees/ — becomes
+# untracked content on the branch being worked on, waiting for the next
+# `git add -A`. Only worktrees/ is ignored: anything else under .claude/ stays
+# visible, so settings or agents can be tracked deliberately if that is wanted.
+.claude/worktrees/
+
 # ---- Large local artifacts never meant for git ----
 ISOs/
 software/