diff --git a/.gitignore b/.gitignore
index 2ea6681..87b6af8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,6 +20,8 @@ venv/
 # Tools
 .aider*
 .codex
+# worktree task marker created by scripts/dev/agent.sh new — must stay untracked per worktree
+.agent-task
 
 # OS files
 .DS_Store