diff --git a/bricks/agent_input.js b/bricks/agent_input.js
index 5af1df9..56a5d8b 100644
--- a/bricks/agent_input.js
+++ b/bricks/agent_input.js
@@ -17,11 +17,13 @@ bricks.AgentInput = class extends bricks.VBox {
         this.file_names = [];
         this.inputfilew.bind('changed', this.file_added.bind(this));
 
-        // text input
+        // text input — 回车直接发送；Ctrl+回车换行（enter_sends 为 UiText 的 opt-in 选项）
         this.textw = new bricks.UiText({
             name: 'prompt',
-            placeholder: opts.placeholder || ''
+            placeholder: opts.placeholder || '',
+            enter_sends: true
         });
+        this.textw.bind('enter_send', this.input_finished.bind(this));
 
         // model selector — 直接用 UiCode，不用 Form
         // session_id 自动注入：模型下拉按会话解析当前项目（多 tab 各自项目），
diff --git a/bricks/input.js b/bricks/input.js
index d1ae8d5..2e0e723 100644
--- a/bricks/input.js
+++ b/bricks/input.js
@@ -1064,7 +1064,12 @@ bricks.UiText =class extends bricks.UiType {
 				break;
 			case 'Enter':
 				e.preventDefault(); // 阻止默认行为
-				this.handle_enter();
+				if (this.opts.enter_sends && !e.ctrlKey && !e.metaKey) {
+					// 回车直接发送（AgentIO 正文输入）；Ctrl+回车 / Cmd+回车仍插入换行
+					this.dispatch('enter_send');
+				} else {
+					this.handle_enter();
+				}
 				break;
 			case 'ArrowUp':
 			case 'ArrowDown':