diff --git a/bin/plugindev_linux_amd64 b/bin/plugindev_linux_amd64
index 5329012..51274e0 100755
Binary files a/bin/plugindev_linux_amd64 and b/bin/plugindev_linux_amd64 differ
diff --git a/example/memo/plg.json b/example/memo/plg.json
index 99e8c74..f100aeb 100644
--- a/example/memo/plg.json
+++ b/example/memo/plg.json
@@ -1,9 +1,9 @@
-{
+{
   "name": "memo",
   "name_zh": "备忘录",
-  "name_en": "Memo/Notes",
+  "name_en": "Memo",
   "version": "1.0.0",
-  "description": "待办事项与备忘录管理插件。支持创建、完成、列表查看。通过阶段钩子在每次对话前注入待办提醒。",
+  "description": "待办与备忘录插件。待办（todo_add/todo_complete/todo_list）会主动提醒；备忘录（memo_create/memo_list/memo_delete）纯记事不提醒。",
   "author": "HomeAgent",
   "entry": "plugin.so",
   "tags": ["memo", "todo", "notes"],
diff --git a/sdk/plugin.go b/sdk/plugin.go
index fa3a89d..1378eaf 100644
--- a/sdk/plugin.go
+++ b/sdk/plugin.go
@@ -111,8 +111,8 @@ type IOInjector interface {
 	InjectInterruptText(source, channel, text string)
 	InjectText(source, channel, text string)
 	InjectTextNoMemory(source, channel, text string)
-	// InjectInputSync injects a text message and synchronously waits for the agent
-	// reply, returning the reply text (empty string if no reply).
+	// InjectInputSync 注入输入事件并同步等待 agent 回复，返回回复文本（无回复时返回空串）。
+	// 用于通道消息的完整闭环：收到入站 → agent 处理 → 回复取回 → 送回通道。
 	InjectInputSync(source, channel, text string) string
 }
 
@@ -371,13 +371,13 @@ func (s *PluginSDK) InjectTextNoMemory(source, channel, text string) {
 }
 
 // InjectInputSync injects a text message and synchronously waits for the agent reply,
-// returning the reply text (empty if no reply). Use it for request-response flows
-// (e.g. channel plugins forwarding messages and sending the agent's reply back).
+// returning the reply text (empty string if none). Replies must be dispatched back
+// to the source channel by the caller.
 func (s *PluginSDK) InjectInputSync(source, channel, text string) string {
-	if s.io != nil {
-		return s.io.InjectInputSync(source, channel, text)
+	if s.io == nil {
+		return ""
 	}
-	return ""
+	return s.io.InjectInputSync(source, channel, text)
 }
 
 // SetAutoRestart 设置插件是否允许内核自动重启（崩溃后自动重载）。
diff --git a/tools/plugindev/templates.go b/tools/plugindev/templates.go
index abfdb3c..b6d667a 100644
--- a/tools/plugindev/templates.go
+++ b/tools/plugindev/templates.go
@@ -365,6 +365,7 @@ enum {
     CORE_INJECT_TEXT          = 5,
     CORE_INJECT_INTERRUPT_TEXT = 6,
     CORE_INJECT_TEXT_NO_MEMORY = 7,
+    CORE_INJECT_INPUT_SYNC    = 47,
     CORE_SET_AUTO_RESTART     = 8,
     CORE_MEMORY_RECALL        = 9,
     CORE_MEMORY_COMMIT        = 10,
@@ -533,6 +534,7 @@ type dispatchIO struct{}
 func (dispatchIO) InjectInterruptText(s, c, t string) { callVoid(6, s, c, t, 0, 0) }
 func (dispatchIO) InjectText(s, c, t string)           { callVoid(5, s, c, t, 0, 0) }
 func (dispatchIO) InjectTextNoMemory(s, c, t string)   { callVoid(7, s, c, t, 0, 0) }
+func (dispatchIO) InjectInputSync(s, c, t string) string { r, _ := callString(47, s, c, t, 0, 0); return r }
 
 type dispatchMemory struct{}
 func (dispatchMemory) Recall(q []string, d int) ([]sdk.Entity, []sdk.Relation, error) {