diff --git a/ena-planner/ena-planner-runtime-utils.js b/ena-planner/ena-planner-runtime-utils.js
index fb7b854..69690a7 100644
--- a/ena-planner/ena-planner-runtime-utils.js
+++ b/ena-planner/ena-planner-runtime-utils.js
@@ -34,6 +34,7 @@ export function applyPlannerResultAndSend({
     rawUserInput = '',
     filtered = '',
     plannerRecall = null,
+    plannerPlotRecord = null,
     runtime = null,
     plannerState = null,
 } = {}) {
@@ -48,10 +49,18 @@ export function applyPlannerResultAndSend({
 
     let handoffPrepared = false;
     if (runtime?.preparePlannerRecallHandoff && plannerRecall?.result) {
+        const plotRecordPayload = plannerPlotRecord && typeof plannerPlotRecord === 'object'
+            ? {
+                ...plannerPlotRecord,
+                rawUserInput: raw,
+                plannerAugmentedMessage: merged,
+            }
+            : null;
         runtime.preparePlannerRecallHandoff({
             rawUserInput: raw,
             plannerAugmentedMessage: merged,
             plannerRecall,
+            plannerPlotRecord: plotRecordPayload,
         });
         handoffPrepared = true;
     }
diff --git a/ena-planner/ena-planner.js b/ena-planner/ena-planner.js
index dbff20f..4eb2a37 100644
--- a/ena-planner/ena-planner.js
+++ b/ena-planner/ena-planner.js
@@ -3,9 +3,8 @@ import { getRequestHeaders, saveSettingsDebounced, substituteParamsExtended } fr
 import { EnaPlannerStorage, migrateFromLWBIfNeeded } from './ena-planner-storage.js';
 import {
     applyPlannerResultAndSend,
-    extractLastNPlots,
-    formatPlotsBlock,
 } from './ena-planner-runtime-utils.js';
+import { readPlannerPlotHistory } from './planner-plot-history.js';
 import { DEFAULT_PROMPT_BLOCKS, BUILTIN_TEMPLATES } from './ena-planner-presets.js';
 import {
     createBuiltinPromptBlock,
@@ -1743,7 +1742,7 @@ async function buildPlannerMessages(rawUserInput) {
     // a little continuity even when memory recall returns empty.
     const recentChatRaw = collectRecentChatSnippet(chat, 2);
 
-    const plotsRaw = formatPlotsBlock(extractLastNPlots(chat, s.plotCount));
+    const plotsRaw = readPlannerPlotHistory(chat, { count: s.plotCount }).block;
 
     // Build scanText for worldbook keyword activation
     const scanText = [charBlockRaw, recentChatRaw, plotsRaw, rawUserInput].join('\n\n');
@@ -1923,6 +1922,10 @@ async function doInterceptAndPlanThenSend() {
             rawUserInput: raw,
             filtered,
             plannerRecall,
+            plannerPlotRecord: {
+                rawUserInput: raw,
+                plotText: filtered,
+            },
             runtime: _bmeRuntime,
             plannerState: state,
         });
diff --git a/ena-planner/planner-plot-history.js b/ena-planner/planner-plot-history.js
new file mode 100644
index 0000000..358abcc
--- /dev/null
+++ b/ena-planner/planner-plot-history.js
@@ -0,0 +1,132 @@
+import {
+    extractLastNPlots,
+    formatPlotsBlock,
+} from './ena-planner-runtime-utils.js';
+
+export const ST_BME_PLOT_HISTORY_KEY = 'st_bme_plot';
+export const ST_BME_PLOT_HISTORY_VERSION = 1;
+
+export function hashPlannerPlotInput(text = '') {
+    let hash = 2166136261;
+    for (const char of String(text || '')) {
+        hash ^= char.charCodeAt(0);
+        hash = Math.imul(hash, 16777619);
+    }
+    return String(Math.abs(hash >>> 0));
+}
+
+export function createStructuredPlotRecord({
+    rawUserInput = '',
+    plannerAugmentedMessage = '',
+    plotText = '',
+    plotBlocks = null,
+    promptProfileId = '',
+    recallHandoffId = '',
+    taskResults = [],
+    createdAt = Date.now(),
+    inputHash = '',
+} = {}) {
+    const normalizedRaw = String(rawUserInput || '').trim();
+    const normalizedPlot = String(plotText || '').trim();
+    const blocks = Array.isArray(plotBlocks)
+        ? plotBlocks.map((item) => String(item || '').trim()).filter(Boolean)
+        : extractLastNPlots([{ mes: normalizedPlot }], 99);
+    return {
+        version: ST_BME_PLOT_HISTORY_VERSION,
+        inputHash: String(inputHash || hashPlannerPlotInput(normalizedRaw)),
+        rawUserInput: normalizedRaw,
+        plannerAugmentedMessage: String(plannerAugmentedMessage || '').trim(),
+        plotText: normalizedPlot,
+        plotBlocks: blocks,
+        promptProfileId: String(promptProfileId || ''),
+        recallHandoffId: String(recallHandoffId || ''),
+        taskResults: Array.isArray(taskResults) ? taskResults : [],
+        createdAt: Number.isFinite(Number(createdAt)) ? Number(createdAt) : Date.now(),
+    };
+}
+
+export function normalizeStructuredPlotRecord(value) {
+    if (!value || typeof value !== 'object') return null;
+    if (Number(value.version) !== ST_BME_PLOT_HISTORY_VERSION) return null;
+    const plotText = String(value.plotText || '').trim();
+    const plotBlocks = Array.isArray(value.plotBlocks)
+        ? value.plotBlocks.map((item) => String(item || '').trim()).filter(Boolean)
+        : [];
+    if (!plotText && plotBlocks.length === 0) return null;
+    return createStructuredPlotRecord({
+        ...value,
+        plotText,
+        plotBlocks,
+        createdAt: value.createdAt,
+    });
+}
+
+export function readStructuredPlotRecordFromMessage(message) {
+    return normalizeStructuredPlotRecord(message?.extra?.[ST_BME_PLOT_HISTORY_KEY]);
+}
+
+export function collectStructuredPlotRecords(chat, count = 2) {
+    if (!Array.isArray(chat) || chat.length === 0) return [];
+    const want = Math.max(0, Number(count) || 0);
+    if (!want) return [];
+    const records = [];
+    for (let index = chat.length - 1; index >= 0; index--) {
+        const record = readStructuredPlotRecordFromMessage(chat[index]);
+        if (!record) continue;
+        records.push(record);
+        if (records.length >= want) break;
+    }
+    return records;
+}
+
+export function readPlannerPlotHistory(chat, { count = 2 } = {}) {
+    const structuredRecords = collectStructuredPlotRecords(chat, count);
+    if (structuredRecords.length > 0) {
+        const plots = structuredRecords.map((record) => record.plotText || record.plotBlocks.join('\n')).filter(Boolean);
+        return {
+            source: 'structured',
+            records: structuredRecords,
+            plots,
+            block: formatPlotsBlock(plots),
+        };
+    }
+
+    const plots = extractLastNPlots(chat, count);
+    return {
+        source: plots.length > 0 ? 'legacy' : 'empty',
+        records: [],
+        plots,
+        block: formatPlotsBlock(plots),
+    };
+}
+
+export function writeStructuredPlotRecordToMessage(message, recordInput) {
+    if (!message || typeof message !== 'object' || !message.is_user) return false;
+    const record = normalizeStructuredPlotRecord(
+        recordInput?.version ? recordInput : createStructuredPlotRecord(recordInput),
+    );
+    if (!record) return false;
+    message.extra = message.extra && typeof message.extra === 'object'
+        ? message.extra
+        : {};
+    message.extra[ST_BME_PLOT_HISTORY_KEY] = record;
+    return true;
+}
+
+export function writeStructuredPlotRecordToMatchingUserMessage(chat, recordInput) {
+    if (!Array.isArray(chat)) return null;
+    const record = normalizeStructuredPlotRecord(
+        recordInput?.version ? recordInput : createStructuredPlotRecord(recordInput),
+    );
+    if (!record) return null;
+    const inputHash = String(record.inputHash || hashPlannerPlotInput(record.rawUserInput));
+    for (let index = chat.length - 1; index >= 0; index--) {
+        const message = chat[index];
+        if (!message?.is_user) continue;
+        if (hashPlannerPlotInput(message.mes || '') !== inputHash) continue;
+        if (writeStructuredPlotRecordToMessage(message, record)) {
+            return { index, record };
+        }
+    }
+    return null;
+}
diff --git a/host/event-binding.js b/host/event-binding.js
index 37a35f2..df0d3d9 100644
--- a/host/event-binding.js
+++ b/host/event-binding.js
@@ -327,6 +327,7 @@ export function onMessageSentController(runtime, messageId) {
     resolvedMessageId,
     message.mes || "",
   );
+  runtime.persistPlannerPlotRecordToUserMessage?.(resolvedMessageId);
   // GENERATION_AFTER_COMMANDS 在 sendMessageAsUser 之前触发，此时新用户消息
   // 尚未进入 chat，recall 记录会被写到上一条 user 上。这里用户消息刚入场，
   // transaction 仍在桥接窗口内，立即把记录重新绑定到正确的楼层。
diff --git a/index.js b/index.js
index 92f7d75..5b8151d 100644
--- a/index.js
+++ b/index.js
@@ -111,6 +111,7 @@ import {
   registerGenerationAfterCommandsController,
   scheduleSendIntentHookRetryController,
 } from "./host/event-binding.js";
+import { writeStructuredPlotRecordToMessage } from "./ena-planner/planner-plot-history.js";
 import {
   BME_HOST_PROFILE_LUKER,
   getBmeHostAdapter,
@@ -14734,16 +14735,43 @@ function preparePlannerRecallHandoff({
   rawUserInput = "",
   plannerAugmentedMessage = "",
   plannerRecall = null,
+  plannerPlotRecord = null,
   chatId = getCurrentChatId(),
 } = {}) {
   return rerollRecallInput.preparePlannerRecallHandoff({
     rawUserInput,
     plannerAugmentedMessage,
     plannerRecall,
+    plannerPlotRecord,
     chatId,
   });
 }
 
+function persistPlannerPlotRecordToUserMessage(newUserMessageIndex) {
+  const context = getContext();
+  const chat = context?.chat;
+  if (
+    !Array.isArray(chat) ||
+    !Number.isFinite(newUserMessageIndex) ||
+    !chat[newUserMessageIndex]?.is_user
+  ) {
+    return false;
+  }
+  const handoff = peekPlannerRecallHandoff(context?.chatId || getCurrentChatId());
+  const plannerPlotRecord = handoff?.plannerPlotRecord;
+  if (!plannerPlotRecord || typeof plannerPlotRecord !== "object") {
+    return false;
+  }
+  const wrote = writeStructuredPlotRecordToMessage(chat[newUserMessageIndex], {
+    ...plannerPlotRecord,
+    recallHandoffId: handoff.id || plannerPlotRecord.recallHandoffId || "",
+  });
+  if (wrote) {
+    triggerChatMetadataSave(context, { immediate: false });
+  }
+  return wrote;
+}
+
 function buildPreGenerationRecallKey(type, options = {}) {
   return generationRecallTransactionRuntime.buildPreGenerationRecallKey(
     type,
@@ -16051,6 +16079,7 @@ function onMessageSent(messageId) {
       getContext,
       isTrivialUserInput,
       markCurrentGenerationTrivialSkip,
+      persistPlannerPlotRecordToUserMessage,
       recordRecallSentUserMessage,
       rebindRecallRecordToNewUserMessage,
       refreshPersistedRecallMessageUi: schedulePersistedRecallMessageUiRefresh,
diff --git a/runtime/reroll-recall-input.js b/runtime/reroll-recall-input.js
index df7cde7..3f04986 100644
--- a/runtime/reroll-recall-input.js
+++ b/runtime/reroll-recall-input.js
@@ -309,6 +309,7 @@ export function createRerollRecallInput(deps = {}) {
     rawUserInput = "",
     plannerAugmentedMessage = "",
     plannerRecall = null,
+    plannerPlotRecord = null,
     chatId = getCurrentChatId(),
   } = {}) {
     const normalizedChatId = normalizeChatIdCandidate(chatId);
@@ -340,6 +341,10 @@ export function createRerollRecallInput(deps = {}) {
         ? plannerRecall.recentMessages.map((item) => String(item || ""))
         : [],
       injectionText,
+      plannerPlotRecord:
+        plannerPlotRecord && typeof plannerPlotRecord === "object"
+          ? { ...plannerPlotRecord }
+          : null,
       source: "planner-handoff",
       sourceLabel: "Planner handoff",
       createdAt,
diff --git a/tests/ena-planner-plots.mjs b/tests/ena-planner-plots.mjs
index 67abe4c..befdb82 100644
--- a/tests/ena-planner-plots.mjs
+++ b/tests/ena-planner-plots.mjs
@@ -5,6 +5,12 @@ import {
   extractLastNPlots,
   formatPlotsBlock,
 } from '../ena-planner/ena-planner-runtime-utils.js';
+import {
+  createStructuredPlotRecord,
+  readPlannerPlotHistory,
+  writeStructuredPlotRecordToMatchingUserMessage,
+  writeStructuredPlotRecordToMessage,
+} from '../ena-planner/planner-plot-history.js';
 
 {
   const chat = [
@@ -44,6 +50,11 @@ import {
       assert.equal(payload.rawUserInput, 'raw input');
       assert.equal(payload.plannerAugmentedMessage, 'raw input\n\n<plot>next</plot>');
       assert.equal(payload.plannerRecall, plannerRecall);
+      assert.deepEqual(payload.plannerPlotRecord, {
+        rawUserInput: 'raw input',
+        plannerAugmentedMessage: 'raw input\n\n<plot>next</plot>',
+        plotText: '<plot>next</plot>',
+      });
     },
   };
 
@@ -53,6 +64,7 @@ import {
     rawUserInput: 'raw input',
     filtered: '<plot>next</plot>',
     plannerRecall,
+    plannerPlotRecord: { plotText: '<plot>next</plot>' },
     runtime,
     plannerState,
   });
@@ -65,6 +77,51 @@ import {
   assert.equal(plannerState.bypassNextSend, true);
 }
 
+{
+  const chat = [
+    { is_user: true, mes: 'raw old', extra: {} },
+    { is_user: false, mes: '<plot>legacy stale</plot>' },
+    { is_user: true, mes: 'raw latest', extra: {} },
+  ];
+  writeStructuredPlotRecordToMessage(chat[2], createStructuredPlotRecord({
+    rawUserInput: 'raw latest',
+    plannerAugmentedMessage: 'raw latest\n\n<plot>structured</plot>',
+    plotText: '<plot>structured</plot>',
+  }));
+  const history = readPlannerPlotHistory(chat, { count: 2 });
+  assert.equal(history.source, 'structured');
+  assert.deepEqual(history.plots, ['<plot>structured</plot>']);
+  assert.ok(history.block.includes('<plot>structured</plot>'));
+  assert.ok(!history.block.includes('legacy stale'));
+}
+
+{
+  const chat = [
+    { is_user: true, mes: 'raw old', extra: {} },
+    { is_user: false, mes: '<plot>legacy old</plot>' },
+  ];
+  chat[0].extra.st_bme_plot = { version: 999, plotText: '<plot>bad</plot>' };
+  const history = readPlannerPlotHistory(chat, { count: 1 });
+  assert.equal(history.source, 'legacy');
+  assert.deepEqual(history.plots, ['<plot>legacy old</plot>']);
+}
+
+{
+  const chat = [
+    { is_user: true, mes: 'first input', extra: {} },
+    { is_user: false, mes: 'assistant' },
+    { is_user: true, mes: 'second input', extra: {} },
+  ];
+  const result = writeStructuredPlotRecordToMatchingUserMessage(chat, {
+    rawUserInput: 'first input',
+    plannerAugmentedMessage: 'first input\n\n<plot>first plan</plot>',
+    plotText: '<plot>first plan</plot>',
+  });
+  assert.equal(result.index, 0);
+  assert.equal(chat[0].extra.st_bme_plot.plotText, '<plot>first plan</plot>');
+  assert.equal(chat[2].extra.st_bme_plot, undefined);
+}
+
 {
   const order = [];
   const result = applyPlannerResultAndSend({