diff --git a/README.md b/README.md
index 5d3f1e5..ed05b15 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@
 
 > **自動提交排除說明**：此 Action 會將自己的 commit message 標記為 `[ai-review-bot]`，而且 action 執行時會先透過 Gitea API 檢查這次觸發的 PR head commit（優先用 `pull_request.head.sha`）是否含有這個 marker，若有就直接成功結束，避免 bot commit 造成重複觸發。若外層 workflow 也能先檢查一次，效果最好。
 
-> **權限說明**：此 Action 需要 `contents: write`（寫入 findings.json）、`pull-requests: write`（發佈 PR comment）、`issues: write`（發佈 issue comment）三項權限，為正常運作所必要，無法縮減。
+> **權限說明**：此 Action 需要 `contents: write`（寫入 findings.json）、`pull-requests: write`（發佈 PR comment）、`issues: write`（發佈 issue comment）、以及 commit status 寫入權限，為正常運作所必要，無法縮減。
 
 ### 1. OpenAI
 ```yaml
diff --git a/app/gitea.js b/app/gitea.js
index 3d7bfe2..0a80476 100644
--- a/app/gitea.js
+++ b/app/gitea.js
@@ -95,6 +95,24 @@ export async function shouldSkipBotCommit({ sha = PR_HEAD_SHA || process.env.GIT
   return false;
 }
 
+export async function setCommitStatus(sha, state, description, context = 'ai-review/critical', targetUrl = '') {
+  if (!sha) throw new Error('commit sha is required for status update');
+  const payload = {
+    state,
+    context,
+    description,
+  };
+  if (targetUrl) payload.target_url = targetUrl;
+
+  const resp = await axios.post(api(`/repos/${GITEA_REPOSITORY}/statuses/${encodeURIComponent(sha)}`), payload, {
+    headers: headers(),
+    timeout: 30000,
+    httpsAgent,
+  });
+  console.log(`  ✅ status: sha=${sha} state=${state} context=${context} description=${description}`);
+  return resp.data;
+}
+
 /**
  * 過濾 diff 內容，移除路徑符合 excludePrefixes 的區塊。
  * 每個區塊以 "diff --git a/<prefix>" 開頭判斷，使用 startsWith 精確比對前綴。
diff --git a/app/gitea.test.js b/app/gitea.test.js
index b80e2e9..751f460 100644
--- a/app/gitea.test.js
+++ b/app/gitea.test.js
@@ -1,7 +1,7 @@
 import { describe, it, afterEach, mock } from 'node:test';
 import assert from 'node:assert/strict';
 import axios from 'axios';
-import { getPRDiff, filterDiff, postComment, getCommitMessageBySha, getBranchHeadCommitMessage, shouldSkipBotCommit } from './gitea.js';
+import { getPRDiff, filterDiff, postComment, getCommitMessageBySha, getBranchHeadCommitMessage, shouldSkipBotCommit, setCommitStatus } from './gitea.js';
 
 afterEach(() => mock.restoreAll());
 
@@ -95,6 +95,25 @@ describe('gitea', () => {
     });
     await assert.equal(await shouldSkipBotCommit({ sha: 'sha-bot', branch: 'feat/test' }), true);
   });
+
+  it('setCommitStatus posts commit status to Gitea API', async () => {
+    let capturedUrl, capturedBody, capturedOpts;
+    mock.method(axios, 'post', async (url, body, opts) => {
+      capturedUrl = url;
+      capturedBody = body;
+      capturedOpts = opts;
+      return { data: { state: body.state } };
+    });
+
+    const result = await setCommitStatus('sha-123', 'failure', 'found 2 critical issues', 'ai-review/critical', 'https://example.com/pr/1');
+    assert.equal(result.state, 'failure');
+    assert.ok(capturedUrl.includes('/statuses/sha-123'));
+    assert.equal(capturedBody.state, 'failure');
+    assert.equal(capturedBody.context, 'ai-review/critical');
+    assert.equal(capturedBody.description, 'found 2 critical issues');
+    assert.equal(capturedBody.target_url, 'https://example.com/pr/1');
+    assert.ok(capturedOpts.headers['Authorization'].startsWith('token '));
+  });
 });
 
 describe('filterDiff', () => {
diff --git a/app/main.js b/app/main.js
index 8773cce..9875806 100644
--- a/app/main.js
+++ b/app/main.js
@@ -1,13 +1,22 @@
 import path from 'path';
-import { GITEA_REPOSITORY, PR_NUMBER, PR_HEAD_BRANCH, PR_BASE_BRANCH, getLLMConfig, FINDINGS_PATH, EXCLUSIONS_PATH } from './config.js';
+import { GITEA_REPOSITORY, GITEA_SERVER_URL, PR_NUMBER, PR_HEAD_BRANCH, PR_BASE_BRANCH, getLLMConfig, FINDINGS_PATH, EXCLUSIONS_PATH } from './config.js';
 import { loadRoles, getRoleIntro } from './roles.js';
-import { getPRDiff, postComment, shouldSkipBotCommit } from './gitea.js';
+import { getPRDiff, postComment, shouldSkipBotCommit, setCommitStatus } from './gitea.js';
 import { analyzeWithRole, loadOldFindings, mergeFindings, sortByLevel, deduplicateWithAI, loadExclusions, applyExclusions, filterFalsePositivesWithAI } from './findings.js';
 import { saveFindings, postOldFindingsComment, postNewNonCriticalComment, postNewCriticalComments } from './comments.js';
 import { cloneRepo, commitAndPush, getRepoState } from './git.js';
 import { validateJSONArrayFile, ensureJSONArrayFileExists } from './json.js';
 
 const WORKSPACE = process.env.GITHUB_WORKSPACE || '/workspace';
+const REVIEW_STATUS_CONTEXT = 'ai-review/critical';
+
+async function updateReviewStatus(sha, criticalCount) {
+  const state = criticalCount > 0 ? 'failure' : 'success';
+  const description = criticalCount > 0
+    ? `found ${criticalCount} critical issue${criticalCount === 1 ? '' : 's'}`
+    : 'no critical issues found';
+  await setCommitStatus(sha, state, description, REVIEW_STATUS_CONTEXT, `${GITEA_SERVER_URL.replace(/\/$/, '')}/${GITEA_REPOSITORY}/pulls/${PR_NUMBER}`);
+}
 
 async function main() {
   console.log('='.repeat(60));
@@ -17,6 +26,17 @@ async function main() {
 
   if (await shouldSkipBotCommit()) {
     console.log('  🤖 偵測到 [ai-review-bot] 自動提交，直接完成 action');
+    let criticalCount = 0;
+    try {
+      const repoDir = cloneRepo(WORKSPACE);
+      const findings = loadOldFindings(repoDir || WORKSPACE);
+      criticalCount = findings.filter(f => f.level === 'critical').length;
+      console.log(`  🔎 bot-check: current findings critical=${criticalCount}`);
+      await updateReviewStatus(process.env.PR_HEAD_SHA || process.env.GITHUB_SHA, criticalCount);
+    } catch (e) {
+      console.error(`  ❌ bot-check: 無法回報 status: ${e.message}`);
+      process.exit(1);
+    }
     console.log('='.repeat(60));
     process.exit(0);
   }
@@ -42,6 +62,7 @@ async function main() {
 
   if (!diff.trim()) {
     console.log('  ⚠️  diff 為空，無需審查');
+    await updateReviewStatus(process.env.PR_HEAD_SHA || process.env.GITHUB_SHA, 0);
     process.exit(0);
   }
 
@@ -133,6 +154,7 @@ async function main() {
   // Step9: 有 critical 問題則 exit 1
   console.log('\n🚦 Step8: 嚴重問題檢查');
   const criticalCount = filtered.filter(f => f.level === 'critical').length;
+  await updateReviewStatus(process.env.PR_HEAD_SHA || process.env.GITHUB_SHA, criticalCount);
   if (criticalCount > 0) {
     console.log(`  ❌ 發現 ${criticalCount} 個嚴重問題，workflow 結束（exit 1）`);
     console.log('='.repeat(60));