预设兼容：按真实抓包对齐装配与包装层，补上声明式工具与预设正则。

- 装配只认 prompt_order.enabled；squash_system_messages 只合并相邻 system（新增 system 档，连接符按酒馆用单换行）
- 包装层：new_chat_prompt、示例对话（new_example_chat_prompt + <START> 切段 + name）、角色卡三块与 personality_format/scenario_format、{{user}}/{{char}} 取值、任务契约并进预设条目
- 工具协议：按 ToolBindings / 伪工具协议数据声明真 tools（presetToolPolicy=preset），工具描述用到的条目不再重复作为消息发出
- 正则：promptOnly 作用于对话历史（含 depth 过滤）、写入时脚本改写回复；{{//}} 注释按配平扫描
- tools/st-request-diff：真假上游抓包对比工具、三份预设的机制结论与实测报告

tests/preset-probe.test.ts

@@ -41,16 +41,16 @@ function samplePreset() {
 
 describe("assemblePresetProbe", () => {
   it("fills the sandwich with sample lore, history, and the current turn", () => {
-    const messages = assemblePresetProbe(samplePreset(), {
-      message: "我推开门。",
-    });
+    const messages = assemblePresetProbe(
+      samplePreset(),
+      { message: "我推开门。" },
+      { squash: "none" },
+    );
 
     expect(messages.map((m) => [m.role, m.content])).toEqual([
-      ["system", "MAIN"],
-      [
-        "system",
-        `### 任务契约\n\n${PROBE_SYSTEM_PROMPT}\n\n### 试跑设定\n\n${DEFAULT_PROBE_CONTEXT.loreBefore}`,
-      ],
+      // 任务契约并进预设自有的 main 条目，不再单独一条
+      ["system", `MAIN\n\n${PROBE_SYSTEM_PROMPT}`],
+      ["system", `### 试跑设定\n\n${DEFAULT_PROBE_CONTEXT.loreBefore}`],
       ["system", DEFAULT_PROBE_CONTEXT.history],
       ["user", "我推开门。"],
       ["system", "PHI"],
@@ -58,17 +58,20 @@ describe("assemblePresetProbe", () => {
   });
 
   it("omits empty optional bags", () => {
-    const messages = assemblePresetProbe(samplePreset(), {
-      message: "你好",
-      loreBefore: "",
-      history: "",
-      loreAfter: "",
-      postTurn: "",
-    });
+    const messages = assemblePresetProbe(
+      samplePreset(),
+      {
+        message: "你好",
+        loreBefore: "",
+        history: "",
+        loreAfter: "",
+        postTurn: "",
+      },
+      { squash: "none" },
+    );
 
     expect(messages.map((m) => m.content)).toEqual([
-      "MAIN",
-      `### 任务契约\n\n${PROBE_SYSTEM_PROMPT}`,
+      `MAIN\n\n${PROBE_SYSTEM_PROMPT}`,
       "你好",
       "PHI",
     ]);
@@ -84,7 +87,10 @@ describe("runPresetProbe", () => {
 
     expect(result.completed).toBe(false);
     expect(result.reply).toBeNull();
-    expect(result.messages.some((m) => m.content === "我推开门。")).toBe(true);
+    // 缺省 strict：system 段会折进 user，所以只断言正文没丢
+    expect(
+      result.messages.map((m) => m.content).join("\n"),
+    ).toContain("我推开门。");
   });
 
   it("returns the model reply when complete is provided", async () => {