diff --git a/src/message-runtime.test.ts b/src/message-runtime.test.ts
index 146b550..4acc849 100644
--- a/src/message-runtime.test.ts
+++ b/src/message-runtime.test.ts
@@ -60,10 +60,12 @@ function makeChannel(chatJid: string): Channel {
     name: 'discord',
     connect: vi.fn().mockResolvedValue(undefined),
     sendMessage: vi.fn().mockResolvedValue(undefined),
+    sendAndTrack: vi.fn().mockResolvedValue('progress-1'),
     isConnected: vi.fn(() => true),
     ownsJid: vi.fn((jid: string) => jid === chatJid),
     disconnect: vi.fn().mockResolvedValue(undefined),
     setTyping: vi.fn().mockResolvedValue(undefined),
+    editMessage: vi.fn().mockResolvedValue(undefined),
   };
 }
 
@@ -221,7 +223,8 @@ describe('createMessageRuntime', () => {
     expect(notifyIdle).toHaveBeenCalledWith(chatJid, 'run-2');
   });
 
-  it('streams Codex progress as a normal room message and only marks idle after the turn settles', async () => {
+  it('tracks Codex progress in one editable message and updates elapsed time every 10 seconds', async () => {
+    vi.useFakeTimers();
     const chatJid = 'group@test';
     const group = makeGroup('codex');
     const channel = makeChannel(chatJid);
@@ -248,6 +251,7 @@ describe('createMessageRuntime', () => {
           newSessionId: 'session-progress',
         });
         expect(notifyIdle).not.toHaveBeenCalled();
+        await vi.advanceTimersByTimeAsync(10_000);
         await onOutput?.({
           status: 'success',
           result: null,
@@ -283,25 +287,124 @@ describe('createMessageRuntime', () => {
       clearSession: vi.fn(),
     });
 
-    const result = await runtime.processGroupMessages(chatJid, {
-      runId: 'run-progress',
-      reason: 'messages',
+    try {
+      const result = await runtime.processGroupMessages(chatJid, {
+        runId: 'run-progress',
+        reason: 'messages',
+      });
+
+      expect(result).toBe(true);
+      expect(channel.sendAndTrack).toHaveBeenCalledWith(
+        chatJid,
+        'CI 상태 확인 중입니다.\n\n0초',
+      );
+      expect(channel.editMessage).toHaveBeenCalledWith(
+        chatJid,
+        'progress-1',
+        'CI 상태 확인 중입니다.\n\n10초',
+      );
+      expect(channel.sendMessage).not.toHaveBeenCalled();
+      expect(notifyIdle).toHaveBeenCalledTimes(1);
+      expect(notifyIdle).toHaveBeenCalledWith(chatJid, 'run-progress');
+      expect(persistSession).toHaveBeenCalledWith(
+        group.folder,
+        'session-progress',
+      );
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+
+  it('formats longer Codex progress durations with minutes and hours', async () => {
+    vi.useFakeTimers();
+    const chatJid = 'group@test';
+    const group = makeGroup('codex');
+    const channel = makeChannel(chatJid);
+
+    vi.mocked(db.getMessagesSince).mockReturnValue([
+      {
+        id: 'msg-1',
+        chat_jid: chatJid,
+        sender: 'user@test',
+        sender_name: 'User',
+        content: 'hello',
+        timestamp: '2026-03-19T00:00:00.000Z',
+      },
+    ]);
+
+    vi.mocked(agentRunner.runAgentProcess).mockImplementation(
+      async (_group, _input, _onProcess, onOutput) => {
+        await onOutput?.({
+          status: 'success',
+          phase: 'progress',
+          result: '오래 걸리는 작업입니다.',
+          newSessionId: 'session-long-progress',
+        });
+        await vi.advanceTimersByTimeAsync(70_000);
+        expect(channel.editMessage).toHaveBeenLastCalledWith(
+          chatJid,
+          'progress-1',
+          '오래 걸리는 작업입니다.\n\n1분 10초',
+        );
+        await vi.advanceTimersByTimeAsync(3_600_000);
+        await onOutput?.({
+          status: 'success',
+          result: null,
+          newSessionId: 'session-long-progress',
+        });
+        return {
+          status: 'success',
+          result: null,
+          newSessionId: 'session-long-progress',
+        };
+      },
+    );
+
+    const runtime = createMessageRuntime({
+      assistantName: 'Andy',
+      idleTimeout: 1_000,
+      pollInterval: 1_000,
+      timezone: 'UTC',
+      triggerPattern: /^@Andy\b/i,
+      channels: [channel],
+      queue: {
+        registerProcess: vi.fn(),
+        closeStdin: vi.fn(),
+        notifyIdle: vi.fn(),
+      } as any,
+      getRegisteredGroups: () => ({ [chatJid]: group }),
+      getSessions: () => ({}),
+      getLastTimestamp: () => '',
+      setLastTimestamp: vi.fn(),
+      getLastAgentTimestamps: () => ({}),
+      saveState: vi.fn(),
+      persistSession: vi.fn(),
+      clearSession: vi.fn(),
     });
 
-    expect(result).toBe(true);
-    expect(channel.sendMessage).toHaveBeenCalledWith(
-      chatJid,
-      'CI 상태 확인 중입니다.',
-    );
-    expect(notifyIdle).toHaveBeenCalledTimes(1);
-    expect(notifyIdle).toHaveBeenCalledWith(chatJid, 'run-progress');
-    expect(persistSession).toHaveBeenCalledWith(
-      group.folder,
-      'session-progress',
-    );
+    try {
+      const result = await runtime.processGroupMessages(chatJid, {
+        runId: 'run-long-progress',
+        reason: 'messages',
+      });
+
+      expect(result).toBe(true);
+      expect(channel.sendAndTrack).toHaveBeenCalledWith(
+        chatJid,
+        '오래 걸리는 작업입니다.\n\n0초',
+      );
+      expect(channel.editMessage).toHaveBeenLastCalledWith(
+        chatJid,
+        'progress-1',
+        '오래 걸리는 작업입니다.\n\n1시간 1분 10초',
+      );
+    } finally {
+      vi.useRealTimers();
+    }
   });
 
   it('keeps progress separate from the final Codex answer', async () => {
+    vi.useFakeTimers();
     const chatJid = 'group@test';
     const group = makeGroup('codex');
     const channel = makeChannel(chatJid);
@@ -326,6 +429,7 @@ describe('createMessageRuntime', () => {
           result: '테스트를 돌리는 중입니다.',
           newSessionId: 'session-final',
         });
+        await vi.advanceTimersByTimeAsync(10_000);
         await onOutput?.({
           status: 'success',
           phase: 'final',
@@ -362,24 +466,31 @@ describe('createMessageRuntime', () => {
       clearSession: vi.fn(),
     });
 
-    const result = await runtime.processGroupMessages(chatJid, {
-      runId: 'run-final',
-      reason: 'messages',
-    });
+    try {
+      const result = await runtime.processGroupMessages(chatJid, {
+        runId: 'run-final',
+        reason: 'messages',
+      });
 
-    expect(result).toBe(true);
-    expect(channel.sendMessage).toHaveBeenNthCalledWith(
-      1,
-      chatJid,
-      '테스트를 돌리는 중입니다.',
-    );
-    expect(channel.sendMessage).toHaveBeenNthCalledWith(
-      2,
-      chatJid,
-      '테스트가 끝났습니다.',
-    );
-    expect(notifyIdle).toHaveBeenCalledTimes(1);
-    expect(notifyIdle).toHaveBeenCalledWith(chatJid, 'run-final');
+      expect(result).toBe(true);
+      expect(channel.sendAndTrack).toHaveBeenCalledWith(
+        chatJid,
+        '테스트를 돌리는 중입니다.\n\n0초',
+      );
+      expect(channel.editMessage).toHaveBeenCalledWith(
+        chatJid,
+        'progress-1',
+        '테스트를 돌리는 중입니다.\n\n10초',
+      );
+      expect(channel.sendMessage).toHaveBeenCalledWith(
+        chatJid,
+        '테스트가 끝났습니다.',
+      );
+      expect(notifyIdle).toHaveBeenCalledTimes(1);
+      expect(notifyIdle).toHaveBeenCalledWith(chatJid, 'run-final');
+    } finally {
+      vi.useRealTimers();
+    }
   });
 
   it('does not roll back when a streamed progress message was already posted before an error', async () => {
@@ -451,9 +562,9 @@ describe('createMessageRuntime', () => {
     });
 
     expect(result).toBe(true);
-    expect(channel.sendMessage).toHaveBeenCalledWith(
+    expect(channel.sendAndTrack).toHaveBeenCalledWith(
       chatJid,
-      '중간 진행상황입니다.',
+      '중간 진행상황입니다.\n\n0초',
     );
     expect(lastAgentTimestamps[chatJid]).toBe('2026-03-19T00:00:00.000Z');
     expect(saveState).toHaveBeenCalled();
diff --git a/src/message-runtime.ts b/src/message-runtime.ts
index 56f88b5..0451cd2 100644
--- a/src/message-runtime.ts
+++ b/src/message-runtime.ts
@@ -93,7 +93,8 @@ export function createMessageRuntime(deps: MessageRuntimeDeps): {
     onOutput?: (output: AgentOutput) => Promise<void>,
   ): Promise<'success' | 'error'> => {
     const isMain = group.isMain === true;
-    const isClaudeCodeAgent = (group.agentType || 'claude-code') === 'claude-code';
+    const isClaudeCodeAgent =
+      (group.agentType || 'claude-code') === 'claude-code';
     const sessions = deps.getSessions();
     const sessionId = sessions[group.folder];
 
@@ -121,10 +122,7 @@ export function createMessageRuntime(deps: MessageRuntimeDeps): {
           if (output.newSessionId) {
             deps.persistSession(group.folder, output.newSessionId);
           }
-          if (
-            isClaudeCodeAgent &&
-            shouldResetSessionOnAgentFailure(output)
-          ) {
+          if (isClaudeCodeAgent && shouldResetSessionOnAgentFailure(output)) {
             resetSessionRequested = true;
           }
           await onOutput(output);
@@ -154,8 +152,7 @@ export function createMessageRuntime(deps: MessageRuntimeDeps): {
 
       if (
         isClaudeCodeAgent &&
-        (resetSessionRequested ||
-          shouldResetSessionOnAgentFailure(output))
+        (resetSessionRequested || shouldResetSessionOnAgentFailure(output))
       ) {
         deps.clearSession(group.folder);
         logger.warn(
@@ -207,11 +204,7 @@ export function createMessageRuntime(deps: MessageRuntimeDeps): {
     const lastAgentTimestamps = deps.getLastAgentTimestamps();
     const sinceTimestamp = lastAgentTimestamps[chatJid] || '';
     const missedMessages = filterOwnChannelMessages(
-      getMessagesSince(
-        chatJid,
-        sinceTimestamp,
-        deps.assistantName,
-      ),
+      getMessagesSince(chatJid, sinceTimestamp, deps.assistantName),
     );
 
     if (missedMessages.length === 0) {
@@ -318,6 +311,10 @@ export function createMessageRuntime(deps: MessageRuntimeDeps): {
 
     let idleTimer: ReturnType<typeof setTimeout> | null = null;
     let latestProgressText: string | null = null;
+    let latestProgressRendered: string | null = null;
+    let progressMessageId: string | null = null;
+    let progressStartedAt: number | null = null;
+    let progressTicker: ReturnType<typeof setInterval> | null = null;
 
     const resetIdleTimer = () => {
       if (idleTimer) clearTimeout(idleTimer);
@@ -337,15 +334,98 @@ export function createMessageRuntime(deps: MessageRuntimeDeps): {
     let finalOutputSentToUser = false;
     let progressOutputSentToUser = false;
     let poisonedSessionDetected = false;
-    const isClaudeCodeAgent = (group.agentType || 'claude-code') === 'claude-code';
+    const isClaudeCodeAgent =
+      (group.agentType || 'claude-code') === 'claude-code';
+
+    const clearProgressTicker = () => {
+      if (progressTicker) {
+        clearInterval(progressTicker);
+        progressTicker = null;
+      }
+    };
+
+    const renderProgressMessage = (text: string) => {
+      const elapsedSeconds =
+        progressStartedAt === null
+          ? 0
+          : Math.floor((Date.now() - progressStartedAt) / 10_000) * 10;
+      const hours = Math.floor(elapsedSeconds / 3600);
+      const minutes = Math.floor((elapsedSeconds % 3600) / 60);
+      const seconds = elapsedSeconds % 60;
+      const elapsedParts: string[] = [];
+
+      if (hours > 0) elapsedParts.push(`${hours}시간`);
+      if (minutes > 0) elapsedParts.push(`${minutes}분`);
+      if (seconds > 0 || elapsedParts.length === 0) {
+        elapsedParts.push(`${seconds}초`);
+      }
+
+      return `${text}\n\n${elapsedParts.join(' ')}`;
+    };
+
+    const syncTrackedProgressMessage = async () => {
+      if (!progressMessageId || !channel.editMessage || !latestProgressText) {
+        return;
+      }
+
+      const rendered = renderProgressMessage(latestProgressText);
+      if (rendered === latestProgressRendered) {
+        return;
+      }
+
+      try {
+        await channel.editMessage(chatJid, progressMessageId, rendered);
+        latestProgressRendered = rendered;
+      } catch {
+        clearProgressTicker();
+        progressMessageId = null;
+      }
+    };
+
+    const ensureProgressTicker = () => {
+      if (!progressMessageId || !channel.editMessage || progressTicker) {
+        return;
+      }
+
+      progressTicker = setInterval(() => {
+        void syncTrackedProgressMessage();
+      }, 10_000);
+    };
+
+    const finalizeProgressMessage = async () => {
+      await syncTrackedProgressMessage();
+      clearProgressTicker();
+    };
 
     const sendProgressMessage = async (text: string) => {
       if (!text || text === latestProgressText) {
         return;
       }
 
+      if (progressStartedAt === null) {
+        progressStartedAt = Date.now();
+      }
       latestProgressText = text;
-      await channel.sendMessage(chatJid, text);
+      const rendered = renderProgressMessage(text);
+
+      if (progressMessageId && channel.editMessage) {
+        await syncTrackedProgressMessage();
+        progressOutputSentToUser = true;
+        return;
+      }
+
+      if (channel.sendAndTrack) {
+        progressMessageId = await channel.sendAndTrack(chatJid, rendered);
+        if (progressMessageId) {
+          latestProgressRendered = rendered;
+          ensureProgressTicker();
+          progressOutputSentToUser = true;
+          return;
+        }
+      }
+
+      latestProgressRendered = rendered;
+      await channel.sendMessage(chatJid, rendered);
       progressOutputSentToUser = true;
     };
 
@@ -399,9 +479,12 @@ export function createMessageRuntime(deps: MessageRuntimeDeps): {
           }
 
           if (text) {
+            await finalizeProgressMessage();
             await channel.sendMessage(chatJid, text);
             finalOutputSentToUser = true;
           }
+        } else {
+          await finalizeProgressMessage();
         }
 
         await channel.setTyping?.(chatJid, false);
@@ -426,6 +509,8 @@ export function createMessageRuntime(deps: MessageRuntimeDeps): {
       hadError = true;
     }
 
+    clearProgressTicker();
+
     if (idleTimer) clearTimeout(idleTimer);
 
     if (hadError) {
@@ -612,11 +697,7 @@ export function createMessageRuntime(deps: MessageRuntimeDeps): {
     for (const [chatJid, group] of Object.entries(registeredGroups)) {
       const sinceTimestamp = lastAgentTimestamps[chatJid] || '';
       const pending = filterOwnChannelMessages(
-        getMessagesSince(
-          chatJid,
-          sinceTimestamp,
-          deps.assistantName,
-        ),
+        getMessagesSince(chatJid, sinceTimestamp, deps.assistantName),
       );
       if (pending.length > 0) {
         logger.info(