feat(consult): answer the sentence asked — no motive guessing, follow-up turns answer directly, first turn says each thing once (BUG-1070～1073)

- Voice: contrast limited to chart structures; drop 「这句我按『……』理解了」; forbid motive/need sentences; yes/no answered first (BUG-1070)
- Follow-up turn (session already holds an answer): ≤200-char direct answer, no skeleton; decided from stored history, no intent regex; tool still runs each turn (BUG-1071)
- Thinking bar first section 「先回答你问的这件事」 (BUG-1072)
- First turn: opener without actions, body headings 盘里支持 / 时间怎么看 / 这周可以做的一件事 only, actions once, ≤900 chars (BUG-1073, D8)
- Checklist is a list to check, not paragraphs to write (T3)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0199rbQDTsUbCVw84wc8BTFe

frontend/src/app/api/consult/route.ts

@@ -44,8 +44,9 @@ import { consultationPublicActivityEvent, streamAgentResponse } from "@/lib/stre
 import type { AgentExecutionReceipt, WorkflowReceipt } from "@/lib/consultation-agent-events";
 import {
   consultationContinueMessages,
-  dailyAnswerShapeInstruction,
-  natalAnswerShapeInstruction,
+  followUpAnswerShapeInstruction,
+  hasPriorAssistantAnswer,
+  natalUserTurnShape,
   natalConsultationThinkingPlan,
   type PublicThinkingSection,
 } from "@/lib/consultation-thinking-plan";
@@ -991,9 +992,11 @@ export async function POST(request: Request) {
       : "如需新的个人星盘结论，必须调用服务器绑定的排盘工具。";
     // The loop's own step after the calculation writes the answer (BUG-1053),
     // so the answer shape the removed compose prompt used to carry is here.
-    const natalInstruction = consultEntrypoint === "daily_starlanguage"
-      ? `${natalToolInstruction}${dailyAnswerShapeInstruction()}`
-      : `${natalToolInstruction}${natalAnswerShapeInstruction()}`;
+    // A session that already holds an answer gets the follow-up shape
+    // (BUG-1071): a direct answer, no skeleton. That is read from the stored
+    // history, never from the wording of the question.
+    const followUpTurn = hasPriorAssistantAnswer(history);
+    const natalInstruction = `${natalToolInstruction}${natalUserTurnShape({ entrypoint: consultEntrypoint, history })}`;
     const adoptedRangeNote = consultationMode === "verified_chart"
       && prepared.serverChart?.truth.birthTimeStatus === "accepted"
       && prepared.serverChart.toolInput.candidate_range
@@ -1311,6 +1314,7 @@ export async function POST(request: Request) {
     if (!prepared.serverChart) throw new Error("server_chart_truth_missing");
     state.thinkingPlan = natalConsultationThinkingPlan({
       domains: [consultationTheme],
+      followUp: followUpTurn,
     });
     const agentContext = createConsultationAgentContext({
       userId,
@@ -1320,6 +1324,7 @@ export async function POST(request: Request) {
       plan: prepared.preReserveResult,
       theme: consultationTheme,
       entrypoint: consultEntrypoint,
+      followUpTurn,
       serverChart: prepared.serverChart,
       abortSignal: agentAbortSignal,
       state,
@@ -1511,6 +1516,11 @@ export async function POST(request: Request) {
       { birthTimeSource: prepared.serverChart.truth.birthTimeSource },
     );
     const workflowReceipt = consultationWorkflowReceipt(workflowContext);
+    // The grounded fallback writes from the injected workflow; same first-turn
+    // / follow-up split as the agentic path (BUG-1071), one statement of it.
+    const legacyNatalInstruction = hasPriorAssistantAnswer(history)
+      ? followUpAnswerShapeInstruction()
+      : "先用不超过 400 字口语直接回答下面的问题，不要加标题；形状为：先给反差（表面 A，底下 B，都是盘上的结构，命名成一个格局）、再说清谁在推谁在修、然后「别去应 X 的象，去扮演 Y 的象」；开场不写行动。然后按三个二级标题写：## 盘里支持这个判断的地方（原始结构、六步宫位、Yoga 表作为依据，只写开场没说过的，表格与正文二选一）、## 时间怎么看、## 这周可以做的一件事（最多三条行动，只在这里出现一次）。全文不超过 900 字。骨架不可省略；不写「先回答你的问题」这个标题，文末技法审计表由产品界面折叠展示，不写进正文。星盘事实只使用系统里已经注入的计算结果，不要复述内部字段、JSON 或再跑一遍咨询流程。";
 
     const cacheBoundary = cachedSystemMessage("【上下文缓存边界】后续内容为本轮请求输入。", selectedModel.model);
     const legacyHistory = history.map((message) => message.role === "user"
@@ -1527,7 +1537,7 @@ export async function POST(request: Request) {
         content: consultationUserTurnContent({
           currentTime: currentTimeContext(requestTime),
           name,
-          instruction: "先用不超过 400 字口语直接回答下面的问题，不要加标题；形状为：先给反差（表面 A，底下 B，命名成一个格局）、再说清谁在推谁在修、然后「别去应 X 的象，去扮演 Y 的象」、收尾最多三条短行动（破折号短句，每条不超过 20 字）；然后再按 skill Level 2 骨架写：原始结构、六步宫位、Yoga 表、时机、综合、文末技法审计表，最后才是现代生活。骨架不可省略。星盘事实只使用系统里已经注入的计算结果，不要复述内部字段、JSON 或再跑一遍咨询流程。",
+          instruction: legacyNatalInstruction,
           summaryText: historyWindow.summaryText,
           droppedCount: historyWindow.droppedCount,
           question: resolvedQuestion.modelQuestion,
@@ -1552,7 +1562,7 @@ export async function POST(request: Request) {
           content: consultationUserTurnContent({
             currentTime: currentTimeContext(requestTime),
             name,
-            instruction: "先用不超过 400 字口语直接回答下面的问题，不要加标题；形状为：先给反差（表面 A，底下 B，命名成一个格局）、再说清谁在推谁在修、然后「别去应 X 的象，去扮演 Y 的象」、收尾最多三条短行动（破折号短句，每条不超过 20 字）；然后再按 skill Level 2 骨架写：原始结构、六步宫位、Yoga 表、时机、综合、文末技法审计表，最后才是现代生活。骨架不可省略。星盘事实只使用系统里已经注入的计算结果，不要复述内部字段、JSON 或再跑一遍咨询流程。",
+            instruction: legacyNatalInstruction,
             summaryText: historyWindow.summaryText,
             droppedCount: historyWindow.droppedCount,
             question: resolvedQuestion.modelQuestion,