diff --git a/common/chaton.hpp b/common/chaton.hpp
index c9a879e33..1140ba409 100644
--- a/common/chaton.hpp
+++ b/common/chaton.hpp
@@ -428,9 +428,7 @@ inline bool chaton_tmpl_apply_ex(
         return false;
     }
     ChatParts cp = {};
-    std::stringstream ss;
     std::string globalBegin = chaton_tmpl_role_kv(tmpl, K_GLOBAL, {K_BEGIN});
-    ss << globalBegin;
     cp.add_part(ChatParts::S, globalBegin);
     int cntSystem = 0;
     int cntUser = 0;
@@ -444,63 +442,47 @@ inline bool chaton_tmpl_apply_ex(
         auto end = chaton_tmpl_role_kv(tmpl, role, {K_END});
         if (role == K_SYSTEM) {
             cntSystem += 1;
-            ss << begin << prefix;
             cp.add_part(ChatParts::S, begin);
             cp.add_part(ChatParts::S, prefix);
         } else if (role == K_USER) {
             cntUser += 1;
             if ((cntSystem == 1) && (cntUser == 1)) {
                 if (conMeta[tmpl][K_SYSTEMUSER_1ST_USER_HAS_BEGIN]) {
-                    ss << begin;
                     cp.add_part(ChatParts::S, begin);
                 }
                 if (conMeta[tmpl][K_SYSTEMUSER_1ST_USER_HAS_PREFIX]) {
-                    ss << prefix;
                     cp.add_part(ChatParts::S, prefix);
                 }
             } else {
-                ss << begin << prefix;
                 cp.add_part(ChatParts::S, begin);
                 cp.add_part(ChatParts::S, prefix);
             }
         } else {
             cntOthers += 1;
-            ss << begin << prefix;
             cp.add_part(ChatParts::S, begin);
             cp.add_part(ChatParts::S, prefix);
         }
-        ss << content;
         cp.add_part(ChatParts::N, content);
         if (role == K_SYSTEM) {
             if (chaton_tmpl_kv_bool(tmpl, K_SYSTEMUSER_SYSTEM_HAS_SUFFIX)) {
-                ss << suffix;
                 cp.add_part(ChatParts::S, suffix);
             }
             if (chaton_tmpl_kv_bool(tmpl, K_SYSTEMUSER_SYSTEM_HAS_END)) {
-                ss << end;
                 cp.add_part(ChatParts::S, end);
             }
         } else {
-            ss << suffix << end;
             cp.add_part(ChatParts::S, suffix);
             cp.add_part(ChatParts::S, end);
         }
     }
     if (alertAssistantAtEnd) {
         auto assistantBeginPrefix = chaton_tmpl_role_kv(tmpl, K_ASSISTANT, {K_BEGIN, K_PREFIX});
-        ss << assistantBeginPrefix;
         cp.add_part(ChatParts::S, assistantBeginPrefix);
     }
     auto globalEnd = chaton_tmpl_role_kv(tmpl, K_GLOBAL, {K_END});
-    ss << globalEnd;
     cp.add_part(ChatParts::S, globalEnd);
     cp.dump();
-    tagged = ss.str();
-    std::string cpStr = cp.str();
-    if (tagged != cpStr) {
-        LOG_TEELN("DBUG:%s:Mismatch between CP[%s] and SS[%s]", __func__, cpStr.c_str(), tagged.c_str());
-        exit(2);
-    }
+    tagged = cp.str();
     LOGLN("DBUG:%s:%s:%s", __func__, tmpl.c_str(), tagged.c_str());
     LOGLN("DBUG:%s:%s:CntSys[%d]:CntUsr[%d]:CntOthers[%d]", __func__, tmpl.c_str(), cntSystem, cntUser, cntOthers);
     types = cp.get_types();