chore: spawn MCP for memories (#21214)

Co-authored-by: Codex <noreply@openai.com>

codex-rs/features/src/lib.rs

@@ -134,6 +134,8 @@ pub enum Feature {
     Sqlite,
     /// Enable startup memory extraction and file-backed memory consolidation.
     MemoryTool,
+    /// Enable product-owned built-in MCP servers.
+    BuiltInMcp,
     /// Enable the Chronicle sidecar for passive screen-context memories.
     Chronicle,
     /// Append additional AGENTS.md guidance to user instructions.
@@ -793,6 +795,12 @@ pub const FEATURES: &[FeatureSpec] = &[
         },
         default_enabled: false,
     },
+    FeatureSpec {
+        id: Feature::BuiltInMcp,
+        key: "builtin_mcp",
+        stage: Stage::UnderDevelopment,
+        default_enabled: false,
+    },
     FeatureSpec {
         id: Feature::Chronicle,
         key: "chronicle",

codex-rs/features/src/tests.rs

@@ -129,6 +129,13 @@ fn remote_compaction_v2_is_under_development() {
     );
 }
 
+#[test]
+fn builtin_mcp_is_under_development() {
+    assert_eq!(Feature::BuiltInMcp.stage(), Stage::UnderDevelopment);
+    assert_eq!(Feature::BuiltInMcp.default_enabled(), false);
+    assert_eq!(feature_for_key("builtin_mcp"), Some(Feature::BuiltInMcp));
+}
+
 #[test]
 fn terminal_resize_reflow_is_experimental_and_enabled_by_default() {
     assert_eq!(