refactor(consult): chat binds the method's truth boundaries, not the engine manual (BUG-1256 step 2)

The method block bound into every chat turn quoted most of SKILL.md (benchmark
scores, CLI flags, oracle queues, file paths) plus the shared method, whose
output contract asks for JSON verdicts, A/B/C/D confidence, audit tables, raw
data and web verification - the opposite of the chat shape. Chat now quotes
only the truth-boundary sections and adds CHAT_METHOD_BOUNDARIES for the
limits from the dropped sections it still has to keep. SKILL.md and the shared
method file are unchanged for reports and skill_read.

Natal system prompt 55,242 -> 26,591 characters. DeepSeek A/B on public
golden charts (flash 10 questions): input 24,560 -> 14,025 tokens, 37.8 ->
30.3 s, no regression in automatic checks or reading; a high-rigor request
still says plainly that no external check was done. Full suite 4970 / fail
24, identical to b8385adb; build keeps / Static.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017eEAG8HD3mm8gsKXgk8uU8

frontend/tests/skill-binding.test.ts

@@ -59,13 +59,20 @@ test("the bound method is the runtime excerpt, not the maintainer manual", () =>
   const body = liveSkillBody();
   const bound = boundMethodText();
 
-  for (const heading of ["商业运行时路由", "关联技法完整调取", "强制工作流", "五层硬约束", "核心方法论", "注意事项", "commercial_skill_truth_overlay"]) {
+  // 原值: 摘录含「商业运行时路由 / 关联技法完整调取 / 强制工作流 / 五层硬约束 / 核心方法论 / 注意事项 / commercial_skill_truth_overlay」与「全谱系真实调用」「静态分析10步」
+  // 新值: 只含诚实边界几节（运行时路由正文、truth overlay、Ashtottari、P0/P1 观察层、三层验证法）；工程与报告用的章节留在技能目录
+  // 原因: 2026-10-07 聊天提示词精简（BUG-1256 第二步）：方法书只摘诚实边界几节，工程记录、跑分、脚本、文件路径和与聊天形状冲突的输出合同不再进每轮系统提示
+  for (const heading of ["商业运行时路由", "关联技法完整调取", "核心方法论"]) {
     assert.ok(body.includes(heading), heading);
     assert.ok(bound.includes(heading), heading);
   }
-  for (const phrase of ["全谱系真实调用", "P0/P1 观察层", "网页对话的技法审计表由界面折叠展示", "静态分析10步"]) {
+  for (const phrase of ["P0/P1 观察层", "网页对话的技法审计表由界面折叠展示", "候选出生时间不得写成 confirmed", "Skill truth overlay 硬边界", "三层验证法"]) {
     assert.ok(bound.includes(phrase), phrase);
   }
+  for (const heading of ["强制工作流", "五层硬约束", "注意事项", "强制规范速查", "当前最硬的未闭环点", "MEVG 强制外部验证门控", "Transit Actionable Output", "全谱系真实调用", "静态分析10步"]) {
+    assert.ok(body.includes(heading), heading);
+    assert.equal(bound.includes(heading), false, heading);
+  }
   for (const heading of ["施工判断原则", "冲顶路线", "37大子命令", "验证与错题体系", "开源复用边界冻结"]) {
     assert.ok(body.includes(heading), heading);
     assert.equal(bound.includes(heading), false, heading);
@@ -296,16 +303,25 @@ test("only chart-answering agents bind the method", () => {
   }
 });
 
-test("the system block binds the shared method sections verbatim from the package", () => {
-  const shared = sharedConsultationMethodMarkdown();
-  const opened = jyotishSkillMethodBlock.indexOf("<jyotish-shared-method>");
-  const closed = jyotishSkillMethodBlock.indexOf("</jyotish-shared-method>");
-  assert.ok(opened >= 0 && closed > opened);
-  const boundShared = jyotishSkillMethodBlock.slice(
-    opened + "<jyotish-shared-method>".length,
-    closed,
-  ).trim();
-  assert.equal(boundShared, shared.trim());
-  assert.match(shared, /Full-Spectrum Invocation Contract/);
-  assert.ok(shared.includes(readFileSync(resolve(jyotishSkillPackage.resolvedPath, "references/event_judgment_skeleton.md"), "utf8").trim()));
+test("chat binds the method boundaries, not the report-shaped shared method (BUG-1256)", async () => {
+  // 原值: 系统块逐字绑定共享方法（Full-Spectrum Invocation Contract + event_judgment_skeleton.md）
+  // 新值: 不再绑定共享方法；改为 <chat-method-boundaries>，用产品自己的话保留聊天仍要守的边界
+  // 原因: 2026-10-07 聊天提示词精简（BUG-1256 第二步）：方法书只摘诚实边界几节，工程记录、跑分、脚本、文件路径和与聊天形状冲突的输出合同不再进每轮系统提示；共享方法要求输出 JSON verdict + A/B/C/D 置信度 + 审计表 + 原始数据 + 联网验证，与聊天形状冲突
+  const { CHAT_METHOD_BOUNDARIES } = await import("../src/mastra/skill-binding.ts");
+  for (const block of [jyotishSkillMethodBlock, jyotishSkillMethodCoreBlock]) {
+    assert.equal(block.includes("<jyotish-shared-method>"), false);
+    assert.equal(block.includes("Full-Spectrum Invocation Contract"), false);
+    assert.ok(block.includes(CHAT_METHOD_BOUNDARIES));
+  }
+  for (const kept of ["不从一段大运或一次行运直接跳到「会发生」", "Vimshottari 与 Narayana 两套大运同向", "大运起止日期只引用卡上给出的", "不宣称全球第一", "没有做外部引擎比对、全网资料核验和真实案例校准，照实说明"]) {
+    assert.ok(CHAT_METHOD_BOUNDARIES.includes(kept), kept);
+  }
+  // The shared method is still the package's own file, for reports and skill_read.
+  assert.match(sharedConsultationMethodMarkdown(), /Full-Spectrum Invocation Contract/);
+});
+
+test("the chat method block stays small (BUG-1256)", () => {
+  // It was 25,872 characters, most of the 55k natal system prompt.
+  assert.ok(jyotishSkillMethodBlock.length < 4_000, `${jyotishSkillMethodBlock.length}`);
+  assert.ok(jyotishSkillMethodCoreBlock.length < 4_000, `${jyotishSkillMethodCoreBlock.length}`);
 });