diff --git a/src/message-runtime-flow.ts b/src/message-runtime-flow.ts
index 9fa5aeb..cf957de 100644
--- a/src/message-runtime-flow.ts
+++ b/src/message-runtime-flow.ts
@@ -1,6 +1,5 @@
 import {
   getLastHumanMessageContent,
-  getLatestPreviousPairedTaskForChat,
   getPairedTurnOutputs,
   getRecentChatMessages,
 } from './db.js';
@@ -11,7 +10,6 @@ import {
   buildOwnerPendingPrompt,
   buildPairedTurnPrompt,
   buildReviewerPendingPrompt,
-  type PriorTaskPromptContext,
 } from './message-runtime-prompts.js';
 import {
   requeuePendingPairedTurn,
@@ -35,7 +33,6 @@ import type {
   NewMessage,
   PairedTask,
   PairedRoomRole,
-  PairedTurnOutput,
   PairedTurnReservationIntentKind,
   RegisteredGroup,
 } from './types.js';
@@ -119,11 +116,6 @@ export function buildPendingPairedTurn(args: {
   const cursor = lastRaw?.seq ?? lastRaw?.timestamp ?? null;
   const taskStatus = task.status;
   const turnOutputs = getPairedTurnOutputs(task.id);
-  const priorTaskContext = resolvePriorTaskPromptContext(
-    chatJid,
-    task,
-    turnOutputs,
-  );
   const lastTurnOutput = turnOutputs[turnOutputs.length - 1];
   const nextTurnAction = resolveNextTurnAction({
     taskStatus,
@@ -144,7 +136,6 @@ export function buildPendingPairedTurn(args: {
         turnOutputs,
         recentHumanMessages,
         lastHumanMessage,
-        priorTaskContext,
       }),
       channel: resolveChannel(taskStatus),
       cursor,
@@ -196,7 +187,6 @@ export function buildPendingPairedTurn(args: {
         turnOutputs,
         recentHumanMessages,
         lastHumanMessage,
-        priorTaskContext,
       }),
       channel: resolveChannel(taskStatus),
       cursor,
@@ -210,38 +200,6 @@ export function buildPendingPairedTurn(args: {
   return null;
 }
 
-function resolvePriorTaskPromptContext(
-  chatJid: string,
-  task: PairedTask,
-  turnOutputs: PairedTurnOutput[],
-): PriorTaskPromptContext | null {
-  if (turnOutputs.length > 0) {
-    return null;
-  }
-
-  const previousTask = getLatestPreviousPairedTaskForChat(chatJid, task.id);
-  if (!previousTask || previousTask.status !== 'completed') {
-    return null;
-  }
-
-  const previousOutputs = getPairedTurnOutputs(previousTask.id);
-  const ownerFinal = [...previousOutputs]
-    .reverse()
-    .find((output) => output.role === 'owner')?.output_text;
-  const reviewerFinal = [...previousOutputs]
-    .reverse()
-    .find((output) => output.role === 'reviewer')?.output_text;
-
-  if (!ownerFinal && !reviewerFinal) {
-    return null;
-  }
-
-  return {
-    ownerFinal: ownerFinal ?? null,
-    reviewerFinal: reviewerFinal ?? null,
-  };
-}
-
 export async function executePendingPairedTurn(args: {
   pendingTurn: Exclude<PendingPairedTurn, null>;
   chatJid: string;
diff --git a/src/message-runtime-prompts.test.ts b/src/message-runtime-prompts.test.ts
index adce36b..f017f27 100644
--- a/src/message-runtime-prompts.test.ts
+++ b/src/message-runtime-prompts.test.ts
@@ -69,7 +69,6 @@ describe('message-runtime-prompts carry-forward guidance', () => {
       ],
       recentHumanMessages: [makeHumanMessage('이제 새 질문')],
       lastHumanMessage: '이제 새 질문',
-      priorTaskContext: null,
     });
 
     expect(
@@ -89,7 +88,6 @@ describe('message-runtime-prompts carry-forward guidance', () => {
       ],
       recentHumanMessages: [makeHumanMessage('새 owner 질문')],
       lastHumanMessage: '새 owner 질문',
-      priorTaskContext: null,
     });
 
     expect(
@@ -115,72 +113,54 @@ describe('message-runtime-prompts carry-forward guidance', () => {
     ).toBe(false);
   });
 
-  it('includes previous owner finals in reviewer pending prompts when the current task has no outputs', () => {
+  it('does not include previous task context in reviewer pending prompts when the current task has no outputs', () => {
     const prompt = buildReviewerPendingPrompt({
       chatJid: 'group@test',
       timezone: 'UTC',
       turnOutputs: [],
       recentHumanMessages: [makeHumanMessage('추가 질문')],
       lastHumanMessage: '추가 질문',
-      priorTaskContext: {
-        ownerFinal: 'DONE\n이전 owner 결론',
-        reviewerFinal: 'DONE_WITH_CONCERNS\n이전 reviewer 결론',
-      },
     });
 
-    expect(prompt).toContain(
+    expect(prompt).toContain('추가 질문');
+    expect(prompt).not.toContain(
       'Background from the previous completed paired task:',
     );
-    expect(prompt).toContain('Previous task owner final:');
-    expect(prompt).toContain('이전 owner 결론');
+    expect(prompt).not.toContain('Previous task owner final:');
+    expect(prompt).not.toContain('이전 owner 결론');
     expect(prompt).not.toContain('Previous task reviewer final:');
     expect(prompt).not.toContain('이전 reviewer 결론');
   });
 
-  it('includes previous owner finals in owner pending prompts when the current task has no outputs', () => {
+  it('does not include previous task context in owner pending prompts when the current task has no outputs', () => {
     const prompt = buildOwnerPendingPrompt({
       chatJid: 'group@test',
       timezone: 'UTC',
       turnOutputs: [],
       recentHumanMessages: [makeHumanMessage('추가 owner 질문')],
       lastHumanMessage: '추가 owner 질문',
-      priorTaskContext: {
-        ownerFinal: 'DONE\n이전 owner 결론',
-        reviewerFinal: 'DONE_WITH_CONCERNS\n이전 reviewer 결론',
-      },
     });
 
-    expect(prompt).toContain(
+    expect(prompt).toContain('추가 owner 질문');
+    expect(prompt).not.toContain(
       'Background from the previous completed paired task:',
     );
-    expect(prompt).toContain('Previous task owner final:');
+    expect(prompt).not.toContain('Previous task owner final:');
+    expect(prompt).not.toContain('이전 owner 결론');
     expect(prompt).not.toContain('Previous task reviewer final:');
-    expect(prompt).toContain('추가 owner 질문');
+    expect(prompt).not.toContain('이전 reviewer 결론');
   });
 
-  it('omits previous reviewer finals from prior task context', () => {
+  it('does not reinject previous reviewer output into new reviewer prompts', () => {
     const prompt = buildReviewerPendingPrompt({
       chatJid: 'group@test',
       timezone: 'UTC',
       turnOutputs: [],
       recentHumanMessages: [makeHumanMessage('새 작업')],
       lastHumanMessage: '새 작업',
-      priorTaskContext: {
-        ownerFinal: null,
-        reviewerFinal: `TASK_DONE
-검증한 것:
-- CI pass
-
-남은 항목 (변동 없음):
-(관찰) 사용자 직접 functional 검증
-(잠재) 다른 enum 영어 라벨 추가 발견 시
-
-현재 시리즈 상태:
-#129 Settings IA
-#130 Runtime Inventory`,
-      },
     });
 
+    expect(prompt).toContain('새 작업');
     expect(prompt).not.toContain('Previous task reviewer final:');
     expect(prompt).not.toContain('검증한 것:');
     expect(prompt).not.toContain('CI pass');
diff --git a/src/message-runtime-prompts.ts b/src/message-runtime-prompts.ts
index 058ca4f..4f15540 100644
--- a/src/message-runtime-prompts.ts
+++ b/src/message-runtime-prompts.ts
@@ -8,11 +8,6 @@ const CARRIED_FORWARD_OWNER_FINAL_MARKER =
 const CARRIED_FORWARD_OWNER_FINAL_GUIDANCE = `System note:
 If you see a message beginning with "${CARRIED_FORWARD_OWNER_FINAL_MARKER}", treat it as background only. Do not repeat, continue, or answer that carried-forward final directly. Respond only to the latest human request and the current task.`;
 
-export interface PriorTaskPromptContext {
-  ownerFinal?: string | null;
-  reviewerFinal?: string | null;
-}
-
 function turnOutputsToMessages(
   outputs: PairedTurnOutput[],
   chatJid: string,
@@ -56,35 +51,6 @@ function prependCarriedForwardGuidance(
   return `${CARRIED_FORWARD_OWNER_FINAL_GUIDANCE}\n\n${prompt}`;
 }
 
-function truncatePriorTaskFinal(text: string, maxChars = 1200): string {
-  const normalized = text.trim();
-  if (normalized.length <= maxChars) {
-    return normalized;
-  }
-  return `${normalized.slice(0, maxChars)}...`;
-}
-
-function formatPriorTaskPromptContext(
-  priorTaskContext?: PriorTaskPromptContext | null,
-): string {
-  if (!priorTaskContext) {
-    return '';
-  }
-
-  const sections: string[] = [];
-  if (priorTaskContext.ownerFinal?.trim()) {
-    sections.push(
-      `Previous task owner final:\n---\n${truncatePriorTaskFinal(priorTaskContext.ownerFinal)}\n---`,
-    );
-  }
-
-  if (sections.length === 0) {
-    return '';
-  }
-
-  return `Background from the previous completed paired task:\n${sections.join('\n\n')}\n\n`;
-}
-
 export function buildPairedTurnPrompt(args: {
   taskId: string;
   chatJid: string;
@@ -119,7 +85,6 @@ export function buildReviewerPendingPrompt(args: {
   turnOutputs: PairedTurnOutput[];
   recentHumanMessages: NewMessage[];
   lastHumanMessage: string | null | undefined;
-  priorTaskContext?: PriorTaskPromptContext | null;
 }): string {
   if (args.turnOutputs.length > 0) {
     return prependCarriedForwardGuidance(
@@ -136,10 +101,10 @@ export function buildReviewerPendingPrompt(args: {
   }
 
   if (!args.lastHumanMessage) {
-    return `${formatPriorTaskPromptContext(args.priorTaskContext)}Review the latest owner changes in the workspace.`;
+    return 'Review the latest owner changes in the workspace.';
   }
 
-  return `${formatPriorTaskPromptContext(args.priorTaskContext)}User request:\n---\n${args.lastHumanMessage}\n---\n\nReview the latest owner changes in the workspace.`;
+  return `User request:\n---\n${args.lastHumanMessage}\n---\n\nReview the latest owner changes in the workspace.`;
 }
 
 export function buildOwnerPendingPrompt(args: {
@@ -148,7 +113,6 @@ export function buildOwnerPendingPrompt(args: {
   turnOutputs: PairedTurnOutput[];
   recentHumanMessages: NewMessage[];
   lastHumanMessage: string | null | undefined;
-  priorTaskContext?: PriorTaskPromptContext | null;
 }): string {
   if (args.turnOutputs.length > 0) {
     return prependCarriedForwardGuidance(
@@ -165,10 +129,10 @@ export function buildOwnerPendingPrompt(args: {
   }
 
   if (!args.lastHumanMessage) {
-    return `${formatPriorTaskPromptContext(args.priorTaskContext)}Continue the owner turn using the latest reviewer or arbiter feedback.`;
+    return 'Continue the owner turn using the latest reviewer or arbiter feedback.';
   }
 
-  return `${formatPriorTaskPromptContext(args.priorTaskContext)}User request:\n---\n${args.lastHumanMessage}\n---\n\nContinue the owner turn using the latest reviewer or arbiter feedback.`;
+  return `User request:\n---\n${args.lastHumanMessage}\n---\n\nContinue the owner turn using the latest reviewer or arbiter feedback.`;
 }
 
 export function buildArbiterPromptForTask(args: {
diff --git a/src/message-runtime.test.ts b/src/message-runtime.test.ts
index ff4281f..2aca497 100644
--- a/src/message-runtime.test.ts
+++ b/src/message-runtime.test.ts
@@ -1994,7 +1994,7 @@ describe('createMessageRuntime', () => {
     });
   });
 
-  it('includes previous task owner final but omits reviewer final in a new reviewer prompt when the current task has no outputs', () => {
+  it('does not reinject previous task finals in a new reviewer prompt when the current task has no outputs', () => {
     const chatJid = 'group@test';
     const group = makeGroup('claude-code');
     const currentTask = {
@@ -2015,44 +2015,7 @@ describe('createMessageRuntime', () => {
       created_at: '2026-03-30T00:00:10.000Z',
       updated_at: '2026-03-30T00:00:10.000Z',
     } as any;
-    const previousTask = {
-      ...currentTask,
-      id: 'task-previous-reviewer',
-      status: 'completed',
-      completion_reason: 'superseded',
-      created_at: '2026-03-30T00:00:00.000Z',
-      updated_at: '2026-03-30T00:00:09.000Z',
-    } as any;
-
-    vi.mocked(db.getLatestPreviousPairedTaskForChat).mockReturnValue(
-      previousTask,
-    );
-    vi.mocked(db.getPairedTurnOutputs).mockImplementation((taskId: string) => {
-      if (taskId === currentTask.id) {
-        return [];
-      }
-      if (taskId === previousTask.id) {
-        return [
-          {
-            id: 1,
-            task_id: previousTask.id,
-            turn_number: 1,
-            role: 'owner',
-            output_text: 'DONE\n이전 owner 답변',
-            created_at: '2026-03-30T00:00:05.000Z',
-          },
-          {
-            id: 2,
-            task_id: previousTask.id,
-            turn_number: 2,
-            role: 'reviewer',
-            output_text: 'DONE_WITH_CONCERNS\n이전 reviewer 피드백',
-            created_at: '2026-03-30T00:00:06.000Z',
-          },
-        ] as any;
-      }
-      return [];
-    });
+    vi.mocked(db.getPairedTurnOutputs).mockReturnValue([]);
     vi.mocked(db.getLastHumanMessageContent).mockReturnValue('추가 질문');
 
     const pending = buildPendingPairedTurn({
@@ -2066,11 +2029,13 @@ describe('createMessageRuntime', () => {
     });
 
     expect(pending).not.toBeNull();
-    expect(pending?.prompt).toContain(
+    expect(db.getLatestPreviousPairedTaskForChat).not.toHaveBeenCalled();
+    expect(pending?.prompt).toContain('추가 질문');
+    expect(pending?.prompt).not.toContain(
       'Background from the previous completed paired task:',
     );
-    expect(pending?.prompt).toContain('Previous task owner final:');
-    expect(pending?.prompt).toContain('이전 owner 답변');
+    expect(pending?.prompt).not.toContain('Previous task owner final:');
+    expect(pending?.prompt).not.toContain('이전 owner 답변');
     expect(pending?.prompt).not.toContain('Previous task reviewer final:');
     expect(pending?.prompt).not.toContain('이전 reviewer 피드백');
   });
diff --git a/src/web-dashboard-attachments.test.ts b/src/web-dashboard-attachments.test.ts
index 6cfdb28..ed030ac 100644
--- a/src/web-dashboard-attachments.test.ts
+++ b/src/web-dashboard-attachments.test.ts
@@ -11,22 +11,22 @@ const ONE_PIXEL_PNG = Buffer.from(
   'base64',
 );
 
-const tempFiles: string[] = [];
+const tempDirs: string[] = [];
 
 afterEach(() => {
-  for (const file of tempFiles.splice(0)) {
-    fs.rmSync(file, { force: true });
+  for (const dir of tempDirs.splice(0)) {
+    fs.rmSync(dir, { force: true, recursive: true });
   }
 });
 
 describe('web dashboard attachment previews', () => {
   it('serves validated direct temp image attachments', async () => {
-    const filePath = path.join(
-      os.tmpdir(),
-      `bar-chart-label-fit-playwright-${Date.now()}.png`,
+    const tempDir = fs.mkdtempSync(
+      path.join(os.tmpdir(), 'ejclaw-dashboard-attachment-'),
     );
+    tempDirs.push(tempDir);
+    const filePath = path.join(tempDir, 'bar-chart-label-fit-playwright.png');
     fs.writeFileSync(filePath, ONE_PIXEL_PNG);
-    tempFiles.push(filePath);
     const handler = createWebDashboardHandler({
       readStatusSnapshots: () => [],
       getTasks: () => [],