Bugbot Summary Generation Hangs

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1

Where does the bug appear (feature/product)?

Bugbot / Security Review Agent

Describe the Bug

Bugbot code review still completes (check run success/neutral, inline findings posted), but the PR-description summary never finishes. Cursor edits the PR body, inserts a CURSOR_SUMMARY block, and leaves this placeholder for hours:

Cursor Bugbot is generating a summary for commit . Configure here.

This is happening across essentially all new PRs in two repos, not one bad diff. status.cursor.com shows Bugbot Operational because reviews still work; the summary rewrite is the step that hangs.

Request ID: serverGenReqId_251a12cf-f81a-4ea5-8122-59520ef595e4
Captured 2026-08-14 17:38 UTC with bugbot run verbose=true on

Steps to Reproduce

  1. Enable Bugbot + PR Summaries (edit PR description) on a GitHub org repo.
  2. Open a PR. Cursor immediately edits the body and inserts a CURSOR_SUMMARY placeholder: “generating a summary for commit …”.
  3. Wait for the Cursor Bugbot check run to complete. Inline review comments may appear.
  4. Observe that the description block is never rewritten with Overview / Risk, even after many hours.

Expected Behavior

After the review completes, replace the generating placeholder with the actual summary (or remove/fail the block). Do not leave “generating” indefinitely. If a later commit is reviewed, update the block to that SHA.

Operating System

MacOS

Version Information

Cursor 3.15.19 (desktop). Hang is in GitHub Bugbot, not the IDE agent.

Additional Information

Last 80 merged mono PRs by created date:

  • Aug 12: 6 completed / 8 stuck generating
  • Aug 13: 1 completed / 28 stuck generating
  • Aug 14 (partial): 2 completed / 7 stuck generating

Please look up serverGenReqId_251a12cf-f81a-4ea5-8122-59520ef595e4 and description-edit traces for PRs 4674 and 4701.

Does this stop you from using Cursor

No - Cursor works, but with this issue

7

Hi @Zuhair_Shaikh Thank you for the post. I confirmed that the Bugbot review completed, but the separate PR summary step did not, leaving the “generating a summary” block in the description. This is not caused by anything in your setup.

This is an issue we’re tracking, and we’ve shared your GitHub example with the team. For now, you can remove the CURSOR_SUMMARY block from affected PR descriptions without affecting the inline findings. A later Bugbot run may insert it again. I’ll post here when there’s an update.