feat: mutable cfg & decode base64 img

prompt.go

@@ -9,6 +9,14 @@ import (
 //go:embed README.md
 var sysp string
 
+// Config stores mutable characteristics of the agent.
+type Config struct {
+	ID       int64  // ID QQ
+	Nickname string // Nickname 昵称
+	Sex      string // Sex 性别
+	Chars    string // Chars 个性
+}
+
 func (ag *Agent) system(role PermRole, iter int, grp int64) (string, error) {
 	tab, err := ag.perm.mdtable(role)
 	if err != nil {
@@ -20,8 +28,8 @@ func (ag *Agent) system(role PermRole, iter int, grp int64) (string, error) {
 		typ = "私聊"
 	}
 	return fmt.Sprintf(
-		sysp, ag.id, ag.nickname, ag.sex,
-		ag.chars, tab, ag.memoryof(grp),
+		sysp, ag.cfg.ID, ag.cfg.Nickname, ag.cfg.Sex,
+		ag.cfg.Chars, tab, ag.memoryof(grp),
 		t.Format(time.RFC3339), t.Unix(), typ, iter,
 	), nil
 }