diff --git a/.gitignore b/.gitignore
old mode 100644
new mode 100755
index ee53c73..daa4671
--- a/.gitignore
+++ b/.gitignore
@@ -37,3 +37,12 @@ Thumbs.db
 # authcore managed key directory — never commit cryptographic keys
 .authcore/
 
+
+# Agent / AI-tool artifacts — never commit (zero AI trace).
+.claude/
+.agents/
+.cursor/
+.aider*
+.continue/
+.playwright-mcp/
+**/*-mcp/