feat: add memory tool (#10637)

Add a tool for memory to retrieve a full memory based on the memory ID

codex-rs/core/src/features.rs

@@ -107,6 +107,8 @@ pub enum Feature {
     RuntimeMetrics,
     /// Persist rollout metadata to a local SQLite database.
     Sqlite,
+    /// Enable the get_memory tool backed by SQLite thread memories.
+    MemoryTool,
     /// Append additional AGENTS.md guidance to user instructions.
     ChildAgentsMd,
     /// Enforce UTF8 output in Powershell.
@@ -449,6 +451,12 @@ pub const FEATURES: &[FeatureSpec] = &[
         stage: Stage::UnderDevelopment,
         default_enabled: false,
     },
+    FeatureSpec {
+        id: Feature::MemoryTool,
+        key: "memory_tool",
+        stage: Stage::UnderDevelopment,
+        default_enabled: false,
+    },
     FeatureSpec {
         id: Feature::ChildAgentsMd,
         key: "child_agents_md",