gh-attach
Uploads a local file (screenshot, image, PDF, zip, video) to GitHub user-attachments, downloads GitHub user-attachments, and embeds local files in a PR, issue, or comment. Use when asked to "attach a screenshot to the PR", "add an image to the issue", "embed before/after screenshots", "attach this f
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SKILL.md
gh-attach
gh attach uploads a file to GitHub's internal user-attachments endpoint (no public API exists) and prints the URL, which GitHub auto-renders (image/video/file) wherever it's pasted. The URL inherits the repo's visibility, so private-repo uploads stay private.
Prerequisites
gh extension list | grep -q 'gh attach' || gh extension install sudosubin/gh-attach
Uploads use a GitHub browser session cookie, not the gh token. By default, gh must be authenticated so gh-attach can select the matching browser account. If the wrong account is selected, add --browser <name> --profile <name>. For headless use, set GH_ATTACH_SESSION_TOKEN to the bare user_session cookie value. Treat it as a full account credential.
Steps
1. Upload: Use an absolute quoted path. -R is optional inside a repository. For GHES, use -R host/owner/repo. The command prints the URL on one line. GitHub auto-renders it (image/video/file), so use it as-is:
URL=$(gh attach "$FILE" -R <owner>/<repo>)
2. Embed (always --body-file -, e.g. gh pr comment/edit, gh issue comment/edit):
printf '## Screenshots\n\n%s\n' "$URL" | gh pr comment <pr> -R <owner>/<repo> --body-file -
3. Download: Specify the destination explicitly. Private attachments use the active gh token, with browser cookies as an authorization fallback:
gh attach download "$URL" -O "$FILE"
Notes
- Private repo: URL renders only for authorized viewers. An anonymous fetch is expected to return 404 or 403.
- Sizing: embed
<img width="800" src="$URL">instead of the bare URL. - GitHub Cloud and GHES decide which file extensions and content types they accept.
Files
1- SKILL.md
a639b7a4d82.1 KB
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