diff --git a/.gitignore b/.gitignore
index 6398ca90..ffec6087 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,11 +21,17 @@ out/
 dist/
 build/
 
+# VS Code 拡張バイナリ（ローカル成果物、git管理外）
+*.vsix
+
 # 環境変数
 .env
 .env.local
 .env.*.local
 
+# MCP 設定（DB 認証情報を含む — git 管理外）
+.mcp.json
+
 # OS
 .DS_Store
 Thumbs.db
diff --git a/posimai-guard-ext/posimai-guard-0.1.0.vsix b/posimai-guard-ext/posimai-guard-0.1.0.vsix
deleted file mode 100644
index 88b803d7..00000000
Binary files a/posimai-guard-ext/posimai-guard-0.1.0.vsix and /dev/null differ