PR Screenshots Don't Eat Your GitHub Repo's 10 GB

Our agents attach screenshots to every PR they open. Before and after shots, a screen recording, sometimes 6 files in one PR. So I wondered if we were quietly filling up the repo. We aren’t. Attachments live outside the repo In where to store large files for GitHub repos, I covered what actually counts: the .git folder, which GitHub caps at 10 GB, and Git LFS. PR and issue attachments are neither. Drag a file in and GitHub uploads it to a github.com/user-attachments/assets/... URL. Nothing gets committed, nothing gets billed, and attachments on a private repo stay private. The only limits are per file: 10 MB for images, 10 MB for videos (100 MB if the repo owner pays), 25 MB for anything else. gh uploads them now Uploading used to need a browser. For at least half a year, we had a Chrome-driven computer-use skill whose only job was dragging screenshots into PR descriptions. gh only caught up recently. gh 2.99.0, released on 1 September 2026, added --attach to gh pr and gh issue: gh pr…

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