diff --git a/agent.go b/agent.go
index deab68a..6340287 100644
--- a/agent.go
+++ b/agent.go
@@ -60,7 +60,7 @@ func (ag *Agent) AddRequest(grp int64, req *zero.APIRequest) {
 	ag.log.Add(grp, req, true)
 }
 
-// AddRequest 添加在执行完 zero.APIRequest 之后得到的响应
+// AddResponse 添加在执行完 zero.APIRequest 之后得到的响应
 func (ag *Agent) AddResponse(grp int64, resp *APIResponse) {
 	ag.log.Add(grp, resp, false)
 }
diff --git a/types.go b/types.go
index ff8dcf8..5130d4b 100644
--- a/types.go
+++ b/types.go
@@ -39,6 +39,7 @@ func (ev *Event) String() string {
 	return strings.TrimSpace(sb.String())
 }
 
+// APIResponse is the simplified OneBot response
 type APIResponse struct {
 	Status  string          `json:"status"`
 	Data    json.RawMessage `json:"data"`
@@ -47,6 +48,7 @@ type APIResponse struct {
 	RetCode int64           `json:"retcode"`
 }
 
+// String dumps JSON without tailing \n
 func (resp *APIResponse) String() string {
 	sb := strings.Builder{}
 	err := json.NewEncoder(&sb).Encode(resp)