fix: set mcp_composer feature as true by default (#9522)

* Set mcp composer feature flag as default true

* Add env var to .env.example

.env.example

@@ -101,6 +101,11 @@ LANGFLOW_SUPERUSER_PASSWORD=
 # Values: true, false
 LANGFLOW_STORE_ENVIRONMENT_VARIABLES=
 
+# Should enable the MCP composer feature in MCP projects
+# Values: true, false
+# Default: true
+LANGFLOW_FEATURE_MCP_COMPOSER=
+
 # STORE_URL
 # Example: LANGFLOW_STORE_URL=https://api.langflow.store
 # LANGFLOW_STORE_URL=

src/backend/base/langflow/services/settings/feature_flags.py

@@ -3,7 +3,7 @@ from pydantic_settings import BaseSettings
 
 class FeatureFlags(BaseSettings):
     mvp_components: bool = False
-    mcp_composer: bool = False
+    mcp_composer: bool = True
 
     class Config:
         env_prefix = "LANGFLOW_FEATURE_"

src/frontend/vite.config.mts

@@ -54,7 +54,7 @@ export default defineConfig(({ mode }) => {
         envLangflow.LANGFLOW_AUTO_LOGIN ?? true,
       ),
       "process.env.LANGFLOW_FEATURE_MCP_COMPOSER": JSON.stringify(
-        envLangflow.LANGFLOW_FEATURE_MCP_COMPOSER ?? "false",
+        envLangflow.LANGFLOW_FEATURE_MCP_COMPOSER ?? "true",
       ),
     },
     plugins: [react(), svgr(), tsconfigPaths()],