diff --git a/prompts/owner-common-paired-room.md b/prompts/owner-common-paired-room.md
index 3335926..0368cb3 100644
--- a/prompts/owner-common-paired-room.md
+++ b/prompts/owner-common-paired-room.md
@@ -25,6 +25,12 @@ Challenge the reviewer's reasoning. Point out logical gaps, over-engineering, sc
 - **BLOCKED** — Cannot proceed. State what is stopping you
 - **NEEDS_CONTEXT** — Missing information needed to continue
 
+### Finalize semantics
+
+- When the reviewer already approved and you are finalizing, **DONE** closes the paired turn
+- In that same finalize step, **DONE_WITH_CONCERNS** does not close the turn — it intentionally reopens review
+- Use **DONE_WITH_CONCERNS** on finalize only when you are explicitly asking the reviewer loop to resume
+
 ## Rules
 
 - Judge completion only by verification output. "It should work now" means run it. "I'm confident" means nothing — confidence is not evidence. "I tested earlier" means test again if code changed since. "It's a trivial change" means verify anyway
diff --git a/src/message-runtime-prompts.ts b/src/message-runtime-prompts.ts
index 9745a8a..bcd8978 100644
--- a/src/message-runtime-prompts.ts
+++ b/src/message-runtime-prompts.ts
@@ -140,5 +140,7 @@ export function buildFinalizePendingPrompt(args: {
     ? `\n\nReviewer's final assessment:\n${lastReviewerOutput.output_text.slice(0, 2000)}`
     : '';
 
-  return `The reviewer approved your work (DONE). Finalize and report the result.${reviewerSummary}`;
+  return `The reviewer approved your work (DONE). Finalize and report the result.
+If you intend to close this paired turn now, your first line must be DONE.
+If your first line is DONE_WITH_CONCERNS, the system will reopen review instead of finishing.${reviewerSummary}`;
 }
diff --git a/src/message-runtime.test.ts b/src/message-runtime.test.ts
index 30a8d47..28d5ee8 100644
--- a/src/message-runtime.test.ts
+++ b/src/message-runtime.test.ts
@@ -1414,7 +1414,9 @@ describe('createMessageRuntime', () => {
     vi.mocked(agentRunner.runAgentProcess).mockImplementation(
       async (_group, input, _onProcess, onOutput) => {
         expect(input.prompt).toBe(
-          `The reviewer approved your work (DONE). Finalize and report the result.\n\nReviewer's final assessment:\n${truncatedReviewerOutput}`,
+          `The reviewer approved your work (DONE). Finalize and report the result.
+If you intend to close this paired turn now, your first line must be DONE.
+If your first line is DONE_WITH_CONCERNS, the system will reopen review instead of finishing.\n\nReviewer's final assessment:\n${truncatedReviewerOutput}`,
         );
         expect(input.prompt).not.toContain(longReviewerOutput);
         expect(input.prompt).not.toContain('이전 reviewer 요약');
@@ -1518,7 +1520,7 @@ describe('createMessageRuntime', () => {
     vi.mocked(agentRunner.runAgentProcess).mockImplementation(
       async (_group, input, _onProcess, onOutput) => {
         expect(input.prompt).toBe(
-          "The reviewer approved your work (DONE). Finalize and report the result.\n\nReviewer's final assessment:\n리뷰 승인 요약",
+          "The reviewer approved your work (DONE). Finalize and report the result.\nIf you intend to close this paired turn now, your first line must be DONE.\nIf your first line is DONE_WITH_CONCERNS, the system will reopen review instead of finishing.\n\nReviewer's final assessment:\n리뷰 승인 요약",
         );
         expect(input.prompt).not.toContain('DONE\n승인합니다.');
         await onOutput?.({
@@ -2027,7 +2029,7 @@ describe('createMessageRuntime', () => {
     vi.mocked(agentRunner.runAgentProcess).mockImplementation(
       async (_group, input, _onProcess, onOutput) => {
         expect(input.prompt).toBe(
-          "The reviewer approved your work (DONE). Finalize and report the result.\n\nReviewer's final assessment:\n리뷰 승인 요약",
+          "The reviewer approved your work (DONE). Finalize and report the result.\nIf you intend to close this paired turn now, your first line must be DONE.\nIf your first line is DONE_WITH_CONCERNS, the system will reopen review instead of finishing.\n\nReviewer's final assessment:\n리뷰 승인 요약",
         );
         await onOutput?.({
           status: 'success',