refactor: extract execution prompt assembly

tests/execution-prompt-assembler.test.ts

@@ -0,0 +1,63 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import {
+  buildExecutionPromptForTesting,
+  resolveRelevantMemoriesForTesting,
+} from "@/lib/execution/prompt-assembler";
+
+test("PromptAssembler 会按固定顺序拼管理员提示词、用户提示词、对话提示词和记忆", () => {
+  const prompt = buildExecutionPromptForTesting({
+    globalPrompt: "GLOBAL",
+    userPrompt: "USER",
+    conversationPrompt: "CONVERSATION",
+    projectMemories: [{ title: "项目记忆", content: "PROJECT", projectId: "boss-console", tags: [] }],
+    userMemories: [{ title: "用户记忆", content: "USER_MEMORY", tags: [] }],
+    requestText: "继续",
+  });
+
+  assert.equal(
+    prompt,
+    [
+      "管理员全局主提示词：\nGLOBAL",
+      "用户私有主提示词：\nUSER",
+      "当前对话附加提示词：\nCONVERSATION",
+      "项目记忆：\n- [boss-console] 项目记忆: PROJECT",
+      "用户通用记忆：\n- 用户记忆: USER_MEMORY",
+      "当前消息：\n继续",
+    ].join("\n\n"),
+  );
+});
+
+test("PromptAssembler 会透出可测试的记忆筛选器", () => {
+  const resolved = resolveRelevantMemoriesForTesting({
+    projectId: "master-agent",
+    requestText: "boss-console 的审批流",
+    memories: [
+      {
+        memoryId: "m1",
+        scope: "project",
+        projectId: "boss-console",
+        title: "审批流",
+        content: "boss-console approval",
+        tags: ["approval"],
+        memoryType: "project_progress",
+        createdAt: "2026-01-01T00:00:00.000Z",
+        updatedAt: "2026-01-01T00:00:00.000Z",
+      },
+      {
+        memoryId: "m2",
+        scope: "project",
+        projectId: "wenshenapp",
+        title: "UI",
+        content: "wechat ui",
+        tags: ["ui"],
+        memoryType: "project_progress",
+        createdAt: "2026-01-02T00:00:00.000Z",
+        updatedAt: "2026-01-02T00:00:00.000Z",
+      },
+    ],
+  });
+
+  assert.equal(resolved.projectMemories.length, 1);
+  assert.equal(resolved.projectMemories[0]?.projectId, "boss-console");
+});