diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8c92512
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,12 @@
+# Build artifacts
+/bin/
+*.out
+
+# Skills are wired as symlinks by the skills library installer and must never
+# be committed (see docs convention in mathias/skills).
+.claude/skills
+
+# Local env / editor
+.env
+.env.*
+*.local