Add notify to code-mode (#14842)

Allows model to send an out-of-band notification.

The notification is injected as another tool call output for the same
call_id.

codex-rs/core/src/context_manager/history.rs

@@ -362,15 +362,15 @@ impl ContextManager {
                     ),
                 }
             }
-            ResponseItem::CustomToolCallOutput { call_id, output } => {
-                ResponseItem::CustomToolCallOutput {
-                    call_id: call_id.clone(),
-                    output: truncate_function_output_payload(
-                        output,
-                        policy_with_serialization_budget,
-                    ),
-                }
-            }
+            ResponseItem::CustomToolCallOutput {
+                call_id,
+                name,
+                output,
+            } => ResponseItem::CustomToolCallOutput {
+                call_id: call_id.clone(),
+                name: name.clone(),
+                output: truncate_function_output_payload(output, policy_with_serialization_budget),
+            },
             ResponseItem::Message { .. }
             | ResponseItem::Reasoning { .. }
             | ResponseItem::LocalShellCall { .. }

codex-rs/core/src/context_manager/history_tests.rs

@@ -73,6 +73,7 @@ fn user_input_text_msg(text: &str) -> ResponseItem {
 fn custom_tool_call_output(call_id: &str, output: &str) -> ResponseItem {
     ResponseItem::CustomToolCallOutput {
         call_id: call_id.to_string(),
+        name: None,
         output: FunctionCallOutputPayload::from_text(output.to_string()),
     }
 }
@@ -296,6 +297,7 @@ fn for_prompt_strips_images_when_model_does_not_support_images() {
         },
         ResponseItem::CustomToolCallOutput {
             call_id: "tool-1".to_string(),
+            name: None,
             output: FunctionCallOutputPayload::from_content_items(vec![
                 FunctionCallOutputContentItem::InputText {
                     text: "js repl result".to_string(),
@@ -358,6 +360,7 @@ fn for_prompt_strips_images_when_model_does_not_support_images() {
         },
         ResponseItem::CustomToolCallOutput {
             call_id: "tool-1".to_string(),
+            name: None,
             output: FunctionCallOutputPayload::from_content_items(vec![
                 FunctionCallOutputContentItem::InputText {
                     text: "js repl result".to_string(),
@@ -806,6 +809,7 @@ fn remove_first_item_handles_custom_tool_pair() {
         },
         ResponseItem::CustomToolCallOutput {
             call_id: "tool-1".to_string(),
+            name: None,
             output: FunctionCallOutputPayload::from_text("ok".to_string()),
         },
     ];
@@ -885,6 +889,7 @@ fn record_items_truncates_custom_tool_call_output_content() {
     let long_output = line.repeat(2_500);
     let item = ResponseItem::CustomToolCallOutput {
         call_id: "tool-200".to_string(),
+        name: None,
         output: FunctionCallOutputPayload::from_text(long_output.clone()),
     };
 
@@ -1087,6 +1092,7 @@ fn normalize_adds_missing_output_for_custom_tool_call() {
             },
             ResponseItem::CustomToolCallOutput {
                 call_id: "tool-x".to_string(),
+                name: None,
                 output: FunctionCallOutputPayload::from_text("aborted".to_string()),
             },
         ]
@@ -1154,6 +1160,7 @@ fn normalize_removes_orphan_function_call_output() {
 fn normalize_removes_orphan_custom_tool_call_output() {
     let items = vec![ResponseItem::CustomToolCallOutput {
         call_id: "orphan-2".to_string(),
+        name: None,
         output: FunctionCallOutputPayload::from_text("ok".to_string()),
     }];
     let mut h = create_history_with_items(items);
@@ -1229,6 +1236,7 @@ fn normalize_mixed_inserts_and_removals() {
             },
             ResponseItem::CustomToolCallOutput {
                 call_id: "t1".to_string(),
+                name: None,
                 output: FunctionCallOutputPayload::from_text("aborted".to_string()),
             },
             ResponseItem::LocalShellCall {
@@ -1366,6 +1374,7 @@ fn normalize_removes_orphan_function_call_output_panics_in_debug() {
 fn normalize_removes_orphan_custom_tool_call_output_panics_in_debug() {
     let items = vec![ResponseItem::CustomToolCallOutput {
         call_id: "orphan-2".to_string(),
+        name: None,
         output: FunctionCallOutputPayload::from_text("ok".to_string()),
     }];
     let mut h = create_history_with_items(items);
@@ -1532,6 +1541,7 @@ fn image_data_url_payload_does_not_dominate_custom_tool_call_output_estimate() {
     let image_url = format!("data:image/png;base64,{payload}");
     let item = ResponseItem::CustomToolCallOutput {
         call_id: "call-js-repl".to_string(),
+        name: None,
         output: FunctionCallOutputPayload::from_content_items(vec![
             FunctionCallOutputContentItem::InputText {
                 text: "Screenshot captured".to_string(),

codex-rs/core/src/context_manager/normalize.rs

@@ -79,6 +79,7 @@ pub(crate) fn ensure_call_outputs_present(items: &mut Vec<ResponseItem>) {
                         idx,
                         ResponseItem::CustomToolCallOutput {
                             call_id: call_id.clone(),
+                            name: None,
                             output: FunctionCallOutputPayload::from_text("aborted".to_string()),
                         },
                     ));