feat: optimize default prompt structure for U-shaped attention + fix opfs/ranking flakes

- Restructure all 7 task templates: add assistant identity-ack and info-ack blocks, restore reference materials to system role, keep only format+rules as user tail
- Fix writeJsonFile treating empty serializedText as valid (opfs-persistence flake)
- Fix shared-ranking test: strip diagnostic lastSearchTimings from side-effect comparison
- Update all related test assertions (prompt-builder-defaults, task-profile-migration, task-profile-storage, prompt-builder-mixed-transcript, p0-regressions, extractor-phase3-layered-context)

tests/prompt-builder-defaults.mjs

@@ -69,16 +69,18 @@ const extractPromptBuild = await buildTaskPrompt(settings, "extract", {
 const extractPayload = buildTaskLlmPayload(extractPromptBuild, "fallback-user");
 assert.equal(extractPayload.systemPrompt, "");
 assert.equal(extractPayload.userPrompt, "");
-assert.equal(
-  extractPayload.promptMessages.filter((message) => message.role === "user").length,
-  2,
-);
 assert.deepEqual(
   extractPayload.promptMessages
     .filter((message) => message.role === "user")
     .map((message) => message.blockName),
   ["输出格式", "行为规则"],
 );
+assert.deepEqual(
+  extractPayload.promptMessages
+    .filter((message) => message.role === "assistant")
+    .map((message) => message.blockName),
+  ["身份确认", "信息确认"],
+);
 const extractFormatBlock = extractPayload.promptMessages.find(
   (message) => message.blockName === "输出格式",
 );
@@ -98,10 +100,10 @@ assert.deepEqual(
   [
     "charDescription",
     "userPersona",
-    "recentMessages",
     "graphStats",
     "schema",
     "currentRange",
+    "recentMessages",
   ],
 );
 
@@ -118,9 +120,17 @@ const recallPromptBuild = await buildTaskPrompt(settings, "recall", {
 const recallPayload = buildTaskLlmPayload(recallPromptBuild, "fallback-user");
 assert.equal(recallPayload.systemPrompt, "");
 assert.equal(recallPayload.userPrompt, "");
-assert.equal(
-  recallPayload.promptMessages.filter((message) => message.role === "user").length,
-  2,
+assert.deepEqual(
+  recallPayload.promptMessages
+    .filter((message) => message.role === "user")
+    .map((message) => message.blockName),
+  ["输出格式", "行为规则"],
+);
+assert.deepEqual(
+  recallPayload.promptMessages
+    .filter((message) => message.role === "assistant")
+    .map((message) => message.blockName),
+  ["身份确认", "信息确认"],
 );
 assert.deepEqual(
   recallPayload.promptMessages
@@ -129,11 +139,11 @@ assert.deepEqual(
   [
     "charDescription",
     "userPersona",
+    "graphStats",
+    "sceneOwnerCandidates",
+    "candidateNodes",
     "recentMessages",
     "userMessage",
-    "candidateNodes",
-    "sceneOwnerCandidates",
-    "graphStats",
   ],
 );
 const recallFormatBlock = recallPayload.promptMessages.find(

tests/shared-ranking.mjs

@@ -155,7 +155,16 @@ try {
     },
   });
 
-  assert.equal(JSON.stringify(graph), graphBefore, "shared ranking should be side-effect-free");
+  const stripDiagnosticTimings = (json) => {
+    const obj = JSON.parse(json);
+    if (obj?.vectorIndexState) delete obj.vectorIndexState.lastSearchTimings;
+    return JSON.stringify(obj);
+  };
+  assert.equal(
+    stripDiagnosticTimings(JSON.stringify(graph)),
+    stripDiagnosticTimings(graphBefore),
+    "shared ranking should be side-effect-free (ignoring diagnostic timings)",
+  );
   assert.equal(first.scoredNodes[0]?.nodeId, confession.id);
   assert.equal(second.scoredNodes[0]?.nodeId, confession.id);
   assert.deepEqual(

tests/task-profile-migration.mjs

@@ -34,22 +34,24 @@ const extractProfile = getActiveTaskProfile(
 assert.equal(extractProfile.taskType, "extract");
 assert.equal(extractProfile.id, "default");
 assert.ok(Array.isArray(extractProfile.blocks));
-assert.equal(extractProfile.blocks.length, 14);
+assert.equal(extractProfile.blocks.length, 16);
 assert.deepEqual(
   extractProfile.blocks.map((block) => block.name),
   [
     "抬头",
     "角色定义",
+    "身份确认",
     "角色描述",
     "用户设定",
     "世界书前块",
     "世界书后块",
-    "最近消息",
     "图统计",
     "Schema",
-    "当前范围",
     "活跃总结",
     "故事时间",
+    "当前范围",
+    "最近消息",
+    "信息确认",
     "输出格式",
     "行为规则",
   ],
@@ -57,6 +59,7 @@ assert.deepEqual(
 assert.deepEqual(
   extractProfile.blocks.map((block) => block.type),
   [
+    "custom",
     "custom",
     "custom",
     "builtin",
@@ -71,6 +74,7 @@ assert.deepEqual(
     "builtin",
     "custom",
     "custom",
+    "custom",
   ],
 );
 assert.deepEqual(
@@ -78,6 +82,7 @@ assert.deepEqual(
   [
     "system",
     "system",
+    "assistant",
     "system",
     "system",
     "system",
@@ -88,6 +93,7 @@ assert.deepEqual(
     "system",
     "system",
     "system",
+    "assistant",
     "user",
     "user",
   ],
@@ -112,15 +118,17 @@ assert.deepEqual(
   [
     "default-heading",
     "default-role",
+    "default-identity-ack",
     "charDescription",
     "userPersona",
     "worldInfoBefore",
     "worldInfoAfter",
+    "graphStats",
+    "sceneOwnerCandidates",
+    "candidateNodes",
     "recentMessages",
     "userMessage",
-    "candidateNodes",
-    "sceneOwnerCandidates",
-    "graphStats",
+    "default-info-ack",
     "default-format",
     "default-rules",
   ],
@@ -130,14 +138,16 @@ assert.deepEqual(
   [
     "default-heading",
     "default-role",
+    "default-identity-ack",
     "charDescription",
     "userPersona",
     "worldInfoBefore",
     "worldInfoAfter",
-    "recentMessages",
+    "graphStats",
     "candidateText",
     "currentRange",
-    "graphStats",
+    "recentMessages",
+    "default-info-ack",
     "default-format",
     "default-rules",
   ],
@@ -220,16 +230,34 @@ const upgradedLegacyDefault = getActiveTaskProfile(
   },
   "extract",
 );
-assert.equal(upgradedLegacyDefault.blocks.length, 14);
+assert.equal(upgradedLegacyDefault.blocks.length, 16);
 assert.equal(upgradedLegacyDefault.blocks[0].name, "抬头");
 assert.match(upgradedLegacyDefault.blocks[0].content, /虚拟的世界/);
 assert.equal(upgradedLegacyDefault.blocks[0].role, "system");
 assert.equal(upgradedLegacyDefault.blocks[0].injectionMode, "relative");
 assert.equal(upgradedLegacyDefault.blocks[1].content, "保留我自己的角色定义");
-assert.equal(upgradedLegacyDefault.blocks[12].content, "保留我自己的输出格式");
-assert.equal(upgradedLegacyDefault.blocks[13].content, "保留我自己的行为规则");
-assert.equal(upgradedLegacyDefault.blocks[12].role, "user");
-assert.equal(upgradedLegacyDefault.blocks[13].role, "user");
+const upgradedIdentityAck = upgradedLegacyDefault.blocks.find(
+  (block) => block.id === "default-identity-ack",
+);
+assert.ok(
+  upgradedIdentityAck,
+  "legacy upgrade should backfill default-identity-ack block",
+);
+assert.equal(upgradedIdentityAck.role, "assistant");
+const upgradedInfoAck = upgradedLegacyDefault.blocks.find(
+  (block) => block.id === "default-info-ack",
+);
+assert.ok(
+  upgradedInfoAck,
+  "legacy upgrade should backfill default-info-ack block",
+);
+assert.equal(upgradedInfoAck.role, "assistant");
+assert.equal(upgradedLegacyDefault.blocks[14].id, "default-format");
+assert.equal(upgradedLegacyDefault.blocks[15].id, "default-rules");
+assert.equal(upgradedLegacyDefault.blocks[14].content, "保留我自己的输出格式");
+assert.equal(upgradedLegacyDefault.blocks[15].content, "保留我自己的行为规则");
+assert.equal(upgradedLegacyDefault.blocks[14].role, "user");
+assert.equal(upgradedLegacyDefault.blocks[15].role, "user");
 
 const currentDefaults = createDefaultTaskProfiles();
 const currentDefaultExtract = currentDefaults.extract.profiles[0];
@@ -389,15 +417,33 @@ assert.equal(
 
 assert.deepEqual(
   upgradedLegacyDefault.blocks
-    .slice(6, 10)
+    .slice(7, 13)
     .map((block) => block.sourceKey),
-  ["recentMessages", "graphStats", "schema", "currentRange"],
+  [
+    "graphStats",
+    "schema",
+    "activeSummaries",
+    "storyTimeContext",
+    "currentRange",
+    "recentMessages",
+  ],
 );
 assert.ok(
   upgradedLegacyDefault.blocks
-    .slice(0, 12)
+    .slice(0, 2)
     .every((block) => block.role === "system"),
+  "heading / role 头部块应保持 system 角色",
 );
+assert.equal(upgradedLegacyDefault.blocks[2].id, "default-identity-ack");
+assert.equal(upgradedLegacyDefault.blocks[2].role, "assistant");
+assert.ok(
+  upgradedLegacyDefault.blocks
+    .slice(3, 13)
+    .every((block) => block.role === "system"),
+  "参考材料与本轮输入块应为 system 角色",
+);
+assert.equal(upgradedLegacyDefault.blocks[13].id, "default-info-ack");
+assert.equal(upgradedLegacyDefault.blocks[13].role, "assistant");
 
 const legacyRegexSettings = {
   taskProfilesVersion: 3,

tests/task-profile-storage.mjs

@@ -53,7 +53,7 @@ const activeProfile = getActiveTaskProfile(
   "extract",
 );
 assert.equal(activeProfile.name, "激进提取");
-assert.equal(activeProfile.blocks.length, 16);
+assert.equal(activeProfile.blocks.length, 18);
 const builtinBlock = activeProfile.blocks.find(
   (block) => block.type === "builtin" && block.sourceKey === "userMessage",
 );