chore: rename memory feature flag (#12580)

`memory_tool` -> `memories`

codex-rs/core/config.schema.json

@@ -349,6 +349,9 @@
             "js_repl_tools_only": {
               "type": "boolean"
             },
+            "memories": {
+              "type": "boolean"
+            },
             "memory_tool": {
               "type": "boolean"
             },
@@ -1627,6 +1630,9 @@
         "js_repl_tools_only": {
           "type": "boolean"
         },
+        "memories": {
+          "type": "boolean"
+        },
         "memory_tool": {
           "type": "boolean"
         },

codex-rs/core/src/features.rs

@@ -499,7 +499,7 @@ pub const FEATURES: &[FeatureSpec] = &[
     },
     FeatureSpec {
         id: Feature::MemoryTool,
-        key: "memory_tool",
+        key: "memories",
         stage: Stage::UnderDevelopment,
         default_enabled: false,
     },

codex-rs/core/src/features/legacy.rs

@@ -37,6 +37,10 @@ const ALIASES: &[Alias] = &[
         legacy_key: "collab",
         feature: Feature::Collab,
     },
+    Alias {
+        legacy_key: "memory_tool",
+        feature: Feature::MemoryTool,
+    },
 ];
 
 pub(crate) fn legacy_feature_keys() -> impl Iterator<Item = &'static str> {