diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bba34a7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+# AI tool directories are machine-local sync targets created by `teamai pull`.
+# Team knowledge lives in .teamai/ on main; hooks are re-injected on clone bootstrap.
+/.claude/
+/.codex/
+/.opencode/