diff --git a/.gitignore b/.gitignore
index 728efed..b4b9f25 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,3 +25,12 @@ target/
 # Editor
 *.swp
 *.swo
+
+# Agent / AI-tool artifacts — never commit (zero AI trace).
+.claude/
+.agents/
+.cursor/
+.aider*
+.continue/
+.playwright-mcp/
+**/*-mcp/