diff --git a/.gitignore b/.gitignore
index 5978c080..59218820 100644
--- a/.gitignore
+++ b/.gitignore
@@ -96,3 +96,11 @@ docs/research/
 .admin-credentials.local
 .env.backup*
 TRAINING GPU QUESTION FIRST RAISED.txt
+
+# Internal tooling — NEVER push to public repos
+.claude/
+.credential-vault/
+.memory/
+.stripe-ids.json
+.migration-backup/
+.venv-docs/