C:/Program Files/Git/ultrareview fails with 502 (and previously 404) — bundle upload broken

Description

/ultrareview (and /ultraplan) consistently fail to upload the branch bundle, making the feature unusable.

Steps to reproduce

1. Open Claude Code (desktop app, Windows 11)
2. Navigate to a git repo with a pushed branch and a configured GitHub remote
3. Run /ultrareview

Errors observed

First attempts returned:

Bundle upload failed: status 404 after 3 attempts. Please setup GitHub on https://claude.ai/code

After confirming GitHub was already connected (shown as "Connected" in claude.ai/code settings), retrying returned:

Request failed with status code 502 after 3 attempts

Environment

• Platform: Windows 11 Pro 10.0.26200
• GitHub Integration: Connected (verified in claude.ai/code settings)
• Repo: DigitumDei/mempalace (public)
• Branch: pushed to remote, visible in git branch -r
• Claude app has repo access: confirmed (mempalace listed under selected repositories in GitHub App settings)

What was verified

• GitHub account connected to claude.ai/code matches repo owner (DigitumDei)
• Repo is public
• Branch is pushed
• Claude GitHub App has explicit access to the mempalace repo
• All of the above confirmed before the 502 errors began appearing

Expected behaviour

/ultrareview successfully bundles and uploads the branch for cloud-side review.