Add apply_patch code mode result (#15100)

It's empty !

codex-rs/core/src/tools/context.rs

@@ -199,6 +199,41 @@ impl ToolOutput for FunctionToolOutput {
     }
 }
 
+pub struct ApplyPatchToolOutput {
+    pub text: String,
+}
+
+impl ApplyPatchToolOutput {
+    pub fn from_text(text: String) -> Self {
+        Self { text }
+    }
+}
+
+impl ToolOutput for ApplyPatchToolOutput {
+    fn log_preview(&self) -> String {
+        telemetry_preview(&self.text)
+    }
+
+    fn success_for_logging(&self) -> bool {
+        true
+    }
+
+    fn to_response_item(&self, call_id: &str, payload: &ToolPayload) -> ResponseInputItem {
+        function_tool_response(
+            call_id,
+            payload,
+            vec![FunctionCallOutputContentItem::InputText {
+                text: self.text.clone(),
+            }],
+            Some(true),
+        )
+    }
+
+    fn code_mode_result(&self, _payload: &ToolPayload) -> JsonValue {
+        JsonValue::Object(serde_json::Map::new())
+    }
+}
+
 pub struct AbortedToolOutput {
     pub message: String,
 }

codex-rs/core/src/tools/handlers/apply_patch.rs

@@ -13,6 +13,7 @@ use crate::codex::TurnContext;
 use crate::function_tool::FunctionCallError;
 use crate::sandboxing::effective_file_system_sandbox_policy;
 use crate::sandboxing::merge_permission_profiles;
+use crate::tools::context::ApplyPatchToolOutput;
 use crate::tools::context::FunctionToolOutput;
 use crate::tools::context::SharedTurnDiffTracker;
 use crate::tools::context::ToolInvocation;
@@ -125,7 +126,7 @@ async fn effective_patch_permissions(
 
 #[async_trait]
 impl ToolHandler for ApplyPatchHandler {
-    type Output = FunctionToolOutput;
+    type Output = ApplyPatchToolOutput;
 
     fn kind(&self) -> ToolKind {
         ToolKind::Function
@@ -179,7 +180,7 @@ impl ToolHandler for ApplyPatchHandler {
                 {
                     InternalApplyPatchInvocation::Output(item) => {
                         let content = item?;
-                        Ok(FunctionToolOutput::from_text(content, Some(true)))
+                        Ok(ApplyPatchToolOutput::from_text(content))
                     }
                     InternalApplyPatchInvocation::DelegateToExec(apply) => {
                         let changes = convert_apply_patch_to_protocol(&apply.action);
@@ -233,7 +234,7 @@ impl ToolHandler for ApplyPatchHandler {
                             Some(&tracker),
                         );
                         let content = emitter.finish(event_ctx, out).await?;
-                        Ok(FunctionToolOutput::from_text(content, Some(true)))
+                        Ok(ApplyPatchToolOutput::from_text(content))
                     }
                 }
             }

codex-rs/core/tests/suite/code_mode.rs

@@ -1911,6 +1911,7 @@ async fn code_mode_can_apply_patch_via_nested_tool() -> Result<()> {
         ),
         text_item(&items, 0),
     );
+    assert_eq!(text_item(&items, 1), "{}");
 
     let file_path = test.cwd_path().join(file_name);
     assert_eq!(fs::read_to_string(&file_path)?, "hello from code_mode\n");