diff --git a/.gitignore b/.gitignore
index 939f7d9..c32d33f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,3 +31,13 @@ docker/nats_data/
 
 # Logs
 *.log
+
+# NestJS
+backend-nest/node_modules/
+backend-nest/dist/
+
+# MCP config (contains credentials)
+.mcp.json
+
+# Scratch/debug artifacts
+browser-error.md