sdk: add RegisterInputChannel + NoMemory/Cleaner support

- ChannelDef struct: NoMemory bool + Cleaner func(string) string
- InputChannelRegistrar interface + RegisterInputChannel method
- RegisterOutputChannel now takes ChannelDef parameter
- QQ example registers input channel with NoMemory:true + Cleaner

example/qq/plugin.go

@@ -165,7 +165,28 @@ meta JSON 格式：
   "reply_to": 12345         // 可选，回复指定消息 ID
 }
 type 枚举: text（文字）/ voice（语音转文字后发送）/ image（图片URL）/ file（文件URL）`,
-		p.handleChannelOutput)
+		sdk.ChannelDef{}, p.handleChannelOutput)
+
+	// ---- 注册输入通道（记忆计算层行为） ----
+	inputCleaner := func(text string) string {
+		// 从中断模板中提取语义内容：消息来源和发送者昵称
+		// 模板: 来自「昵称」的私聊/群聊消息(message_id=N)...
+		// 模板: 【重要！老大消息】来自「昵称」...
+		cleaned := text
+		// 去掉模板前缀
+		if strings.HasPrefix(cleaned, "【重要！老大消息】") {
+			cleaned = strings.TrimPrefix(cleaned, "【重要！老大消息】")
+		}
+		// 提取 "来自「XXX」" 中的昵称作为关键词
+		if start := strings.Index(cleaned, "来自「"); start >= 0 {
+			if end := strings.Index(cleaned[start:], "」"); end >= 0 {
+				nick := cleaned[start+len("来自「") : start+end]
+				cleaned = nick
+			}
+		}
+		return cleaned
+	}
+	s.RegisterInputChannel("qq", sdk.ChannelDef{NoMemory: true, Cleaner: inputCleaner})
 
 	// 查询类工具输出清洗器：提取 JSON 中的 content/文本字段参与向量化
 	cleaner := func(output string) string {

sdk/plugin.go

@@ -35,6 +35,14 @@ const (
 	StageAfterOutput    Stage = "after_output"
 )
 
+// ChannelDef 描述通道在记忆计算层的行为，与 ToolDef.NoMemory/Cleaner 语义一致。
+// NoMemory: 此通道输入/输出不参与记忆计算（向量化/关键词提取/蒸馏），但原文保留在上下文中
+// Cleaner:  计算层过滤函数，不改原文；仅在向量化/jieba/蒸馏/存档提取关键词时调用
+type ChannelDef struct {
+	NoMemory bool
+	Cleaner  func(string) string
+}
+
 // StageContext provides context for stage handlers.
 type StageContext struct {
 	mu               sync.RWMutex
@@ -156,8 +164,11 @@ type StageRegistrar func(stage Stage, handler StageHandler)
 // APIRegistrar registers a plugin API for external access.
 type APIRegistrar func(name string) error
 
+// InputChannelRegistrar registers an input channel with its memory behavior.
+type InputChannelRegistrar func(name string, def ChannelDef) error
+
 // OutputChannelRegistrar registers an output channel that the output_send tool can use.
-type OutputChannelRegistrar func(name string, caps int, desc string, handler ToolHandler) error
+type OutputChannelRegistrar func(name string, caps int, desc string, def ChannelDef, handler ToolHandler) error
 
 // Output capability flags
 const (
@@ -176,6 +187,7 @@ type PluginSDK struct {
 	regStage  StageRegistrar
 	regAPI    APIRegistrar
 	regOutput OutputChannelRegistrar
+	regInput  InputChannelRegistrar
 	io        IOInjector
 	mem       MemoryAPI
 	textMem   TextMemoryAPI
@@ -289,10 +301,21 @@ func (s *PluginSDK) RegisterPluginAPI(name string) error {
 // name: channel name (e.g. "qq", "webui")
 // caps: bitmask of supported output capabilities (CapText, CapFile, etc.)
 // desc: description of the channel, expected meta format, and type enum
+// def:  通道在记忆计算层的行为（NoMemory/Cleaner）
 // handler: receives args map with keys: payload (string), type (string), meta (string|optional)
-func (s *PluginSDK) RegisterOutputChannel(name string, caps int, desc string, handler ToolHandler) error {
+func (s *PluginSDK) RegisterOutputChannel(name string, caps int, desc string, def ChannelDef, handler ToolHandler) error {
 	if s.regOutput != nil {
-		return s.regOutput(name, caps, desc, handler)
+		return s.regOutput(name, caps, desc, def, handler)
+	}
+	return nil
+}
+
+// RegisterInputChannel registers an input channel with its memory behavior.
+// def.NoMemory: 此通道输入不参与记忆计算
+// def.Cleaner:  计算层对输入文本清洗后（不改原文）再向量化/提关键词
+func (s *PluginSDK) RegisterInputChannel(name string, def ChannelDef) error {
+	if s.regInput != nil {
+		return s.regInput(name, def)
 	}
 	return nil
 }
@@ -300,6 +323,9 @@ func (s *PluginSDK) RegisterOutputChannel(name string, caps int, desc string, ha
 // SetOutputChannelRegistrar sets the output channel registrar (called by the core at startup).
 func (s *PluginSDK) SetOutputChannelRegistrar(r OutputChannelRegistrar) { s.regOutput = r }
 
+// SetInputChannelRegistrar sets the input channel registrar (called by the core at startup).
+func (s *PluginSDK) SetInputChannelRegistrar(r InputChannelRegistrar) { s.regInput = r }
+
 // SetIOInjector sets the IO injector (called by the core at startup).
 func (s *PluginSDK) SetIOInjector(io IOInjector) { s.io = io }