diff --git a/.changeset/acp-todolist-plan.md b/.changeset/acp-todolist-plan.md
new file mode 100644
index 0000000000..d43a082813
--- /dev/null
+++ b/.changeset/acp-todolist-plan.md
@@ -0,0 +1,6 @@
+---
+"@moonshot-ai/agent-core-v2": patch
+"@moonshot-ai/kimi-code": patch
+---
+
+Fix ACP `plan` updates never being emitted for TodoList calls on the v2 engine: the v2 TodoList tool now attaches the `todo_list` input-display block to its execution, so `kimi acp` sends a `plan` session update whenever the agent reads or updates its todo list (previously the display was never attached, so the plan mapping in the ACP adapter could never fire).
diff --git a/packages/agent-core-v2/src/agent/tools/todo-list/todoListTool.ts b/packages/agent-core-v2/src/agent/tools/todo-list/todoListTool.ts
index 6d0b0e36c6..236e30526b 100644
--- a/packages/agent-core-v2/src/agent/tools/todo-list/todoListTool.ts
+++ b/packages/agent-core-v2/src/agent/tools/todo-list/todoListTool.ts
@@ -50,6 +50,13 @@ export class TodoListTool implements ITodoListTool {
           : 'Updating todo list';
     return {
       description,
+      display: {
+        kind: 'todo_list',
+        items: (args.todos ?? this.todo.getTodos()).map((todo) => ({
+          title: todo.title,
+          status: todo.status,
+        })),
+      },
       approvalRule: this.name,
       execute: async () => {
         if (args.todos === undefined) {
diff --git a/packages/agent-core-v2/test/session/todo/tools/todo-list.test.ts b/packages/agent-core-v2/test/session/todo/tools/todo-list.test.ts
index 66766d70ff..f1c1bbf60d 100644
--- a/packages/agent-core-v2/test/session/todo/tools/todo-list.test.ts
+++ b/packages/agent-core-v2/test/session/todo/tools/todo-list.test.ts
@@ -171,4 +171,48 @@ describe('TodoListTool', () => {
     expect(clearExecution.description).toBe('Clearing todo list');
     expect(updateExecution.description).toBe('Updating todo list');
   });
+
+  it('resolveExecution attaches a todo_list display block so ACP can emit a plan update', () => {
+    const { tool } = makeTool([{ title: 'existing', status: 'in_progress' }]);
+
+    const updateExecution = tool.resolveExecution({
+      todos: [
+        { title: 'first', status: 'pending' },
+        { title: 'second', status: 'done' },
+      ],
+    });
+    if (updateExecution.isError === true) {
+      throw new TypeError('expected a runnable execution');
+    }
+    expect(updateExecution.display).toEqual({
+      kind: 'todo_list',
+      items: [
+        { title: 'first', status: 'pending' },
+        { title: 'second', status: 'done' },
+      ],
+    });
+  });
+
+  it('query mode display reflects the current stored list', () => {
+    const { tool } = makeTool([{ title: 'existing', status: 'in_progress' }]);
+
+    const readExecution = tool.resolveExecution({});
+    if (readExecution.isError === true) {
+      throw new TypeError('expected a runnable execution');
+    }
+    expect(readExecution.display).toEqual({
+      kind: 'todo_list',
+      items: [{ title: 'existing', status: 'in_progress' }],
+    });
+  });
+
+  it('clear mode display carries an empty items array', () => {
+    const { tool } = makeTool([{ title: 'existing', status: 'pending' }]);
+
+    const clearExecution = tool.resolveExecution({ todos: [] });
+    if (clearExecution.isError === true) {
+      throw new TypeError('expected a runnable execution');
+    }
+    expect(clearExecution.display).toEqual({ kind: 'todo_list', items: [] });
+  });
 });