diff --git a/codex-rs/ext/memories/src/prompt_contributor.rs b/codex-rs/ext/memories/src/prompt_contributor.rs
new file mode 100644
index 0000000000..1244e2e7ce
--- /dev/null
+++ b/codex-rs/ext/memories/src/prompt_contributor.rs
@@ -0,0 +1,19 @@
+use codex_extension_api::ContextContributor;
+use codex_extension_api::PromptFragment;
+use codex_extension_api::Stores;
+
+use crate::MemoriesExtension;
+use crate::ctx::MemoriesContext;
+
+impl<C: MemoriesContext> ContextContributor<C> for MemoriesExtension {
+    fn contribute(&self, context: &C, _stores: &Stores<'_>) -> Vec<PromptFragment> {
+        if !self.is_read_surface_enabled(context) {
+            return Vec::new();
+        }
+
+        self.read_prompt()
+            .map(PromptFragment::developer_policy)
+            .into_iter()
+            .collect()
+    }
+}
diff --git a/codex-rs/ext/memories/src/tool_contributor.rs b/codex-rs/ext/memories/src/tool_contributor.rs
new file mode 100644
index 0000000000..b4a9198d3b
--- /dev/null
+++ b/codex-rs/ext/memories/src/tool_contributor.rs
@@ -0,0 +1,17 @@
+use codex_extension_api::Stores;
+use codex_extension_api::ToolContribution;
+use codex_extension_api::ToolContributor;
+
+use crate::MemoriesExtension;
+use crate::ctx::MemoriesContext;
+
+impl<C: MemoriesContext + Send + Sync + 'static> ToolContributor<C> for MemoriesExtension {
+    fn tools(&self, context: &C, _stores: &Stores<'_>) -> Vec<ToolContribution<C>> {
+        if !self.is_read_surface_enabled(context) {
+            return Vec::new();
+        }
+
+        // TODO(jif) add more tools ofc
+        vec![self.list_tool.contribution()]
+    }
+}