diff --git a/__tests__/integration/ai-review.test.js b/__tests__/integration/ai-review.test.js
index c49e60f..06d8bee 100644
--- a/__tests__/integration/ai-review.test.js
+++ b/__tests__/integration/ai-review.test.js
@@ -40,12 +40,33 @@ import { getLogger } from '../../src/logger.js';
 // ---------------------------------------------------------------------------
 
 function createMockOctokit() {
+  // Production code now calls octokit.request(route, params) for issue comments
+  // (was octokit.issues.X — that namespace turned out to be undefined at runtime
+  // in Probot v14's pull_request.opened context). Existing tests assert against
+  // octokit.issues.X mocks, so we retrofit the shape: route the request mock
+  // into the namespaced jest.fn()s for the three relevant routes.
+  const issuesListComments = jest.fn().mockResolvedValue({ data: [] });
+  const issuesCreateComment = jest.fn().mockResolvedValue({ status: 201, data: {} });
+  const issuesUpdateComment = jest.fn().mockResolvedValue({ status: 200, data: {} });
+
+  const routeDispatch = {
+    'GET /repos/{owner}/{repo}/issues/{issue_number}/comments': issuesListComments,
+    'POST /repos/{owner}/{repo}/issues/{issue_number}/comments': issuesCreateComment,
+    'PATCH /repos/{owner}/{repo}/issues/comments/{comment_id}': issuesUpdateComment
+  };
+
+  const request = jest.fn((route, params) => {
+    const dispatch = routeDispatch[route];
+    if (dispatch) return dispatch(params);
+    return Promise.resolve({ status: 200, data: {} });
+  });
+
   return {
-    request: jest.fn().mockResolvedValue({ status: 200, data: {} }),
+    request,
     issues: {
-      createComment: jest.fn().mockResolvedValue({ status: 201, data: {} }),
-      listComments: jest.fn().mockResolvedValue({ data: [] }),
-      updateComment: jest.fn().mockResolvedValue({ status: 200, data: {} })
+      listComments: issuesListComments,
+      createComment: issuesCreateComment,
+      updateComment: issuesUpdateComment
     }
   };
 }
diff --git a/src/ai-review.js b/src/ai-review.js
index aac4f00..7a742ac 100644
--- a/src/ai-review.js
+++ b/src/ai-review.js
@@ -285,13 +285,14 @@ function formatReviewComment(aiResponse, prNumber, headSha, meta) {
  */
 async function supersedePreviousReviews(octokit, owner, repo, prNumber) {
   try {
-    // List all comments on the PR
-    const { data: comments } = await octokit.issues.listComments({
-      owner,
-      repo,
-      issue_number: prNumber,
-      per_page: 100
-    });
+    // Use octokit.request() form (not .issues.listComments) because Probot v14's
+    // bundled Octokit does not always expose the .issues namespace plugin in the
+    // pull_request.opened event context \u2014 that mismatch was silently breaking
+    // every auto AI review with "Cannot read properties of undefined".
+    const { data: comments } = await octokit.request(
+      'GET /repos/{owner}/{repo}/issues/{issue_number}/comments',
+      { owner, repo, issue_number: prNumber, per_page: 100 }
+    );
 
     const outdatedPrefix =
       '> \u26a0\ufe0f **Outdated** \u2014 this review was for an earlier revision. See the latest review below.\n\n';
@@ -302,12 +303,15 @@ async function supersedePreviousReviews(octokit, owner, repo, prNumber) {
         comment.body.includes(AI_REVIEW_SIGNATURE) &&
         !comment.body.startsWith('>')
       ) {
-        await octokit.issues.updateComment({
-          owner,
-          repo,
-          comment_id: comment.id,
-          body: outdatedPrefix + comment.body
-        });
+        await octokit.request(
+          'PATCH /repos/{owner}/{repo}/issues/comments/{comment_id}',
+          {
+            owner,
+            repo,
+            comment_id: comment.id,
+            body: outdatedPrefix + comment.body
+          }
+        );
       }
     }
   } catch (error) {
@@ -396,12 +400,10 @@ async function reviewPullRequest(octokit, owner, repo, prNumber) {
     // Mark previous bot reviews as outdated
     await supersedePreviousReviews(octokit, owner, repo, prNumber);
 
-    await octokit.issues.createComment({
-      owner,
-      repo,
-      issue_number: prNumber,
-      body: comment
-    });
+    await octokit.request(
+      'POST /repos/{owner}/{repo}/issues/{issue_number}/comments',
+      { owner, repo, issue_number: prNumber, body: comment }
+    );
 
     // Store the review record
     storeReview({