Skills

Skill 185 of 200

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.

1 minute · 186 words · 3 sections

Install

$ npx skills add github/awesome-copilot --skill gh-attach

$ npx skills add github/awesome-copilot

» /plugin marketplace add github/awesome-copilot

The first command installs just this skill, by the name in its SKILL.md; the second installs the whole repository.

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.

About this skill

Trigger

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 file", or "download this GitHub attachment". Powered by `gh-attach`.

The verbatim description from this skill’s front matter — the string an agent matches on to decide whether to load it.

Colophon for this issue

Colophon

How this issue was made

Source

github.com/github/awesome-copilot, branch main, last pushed 24 September 2026.

Licence

MIT — the text of every skill is reproduced unmodified, frontmatter included, under the upstream licence.

Discovery

200 skills found by walking the repository tree for SKILL.md, not by matching a directory convention. 2 distinct layouts observed: .github/skills/*/SKILL.md, skills/*/SKILL.md.

Authorship

3 of 200 skills are installed into the repository rather than published from it. They are shelved in the closing “Credited skills” part and remain the work of their own authors. A skill counts as credited when its only copy lives under one agent’s dot directory; visible directories, per-agent mirror sets, and skills installable from this repository on skills.sh all count as published.

Issue colours

Resolved from a curated brand profile — hue 295°, chroma 0.190. Two accent tones are generated per issue and each is proven against its own ground before it ships: a single accent that passes AA on both light and dark paper is arithmetically impossible.

Heading repairs

1 repair applied to this skill so the document has one h1 and no skipped levels:

Removed “gh-attach”, a leading h1 that duplicated the skill title.

Spec compliance

Every skill satisfies the Agent Skills specification’s frontmatter rules.

Images

Images inside a skill come from the upstream repository. Where the author gave no alternative text we mark the image decorative rather than inventing a description — a plausible caption we made up is worse than none for the reader who depends on it.

Marketplace

A plugin manifest is published at .github/plugin/marketplace.json by GitHub, declaring 162 plugins. It is read for editorial metadata only — never as the skill index, which is always the repository tree.

Signal

Install counts come from skills.sh. They measure downloads, not quality, and an unranked repository is not an unread one.

Agent surfaces

The whole issue is available as one markdown document at /github/awesome-copilot.md, and each skill at its own .md URL.

Publication

Set by Skills Docs from the source repository. Body text is Literata at the reader’s chosen size and measure; code is Geist Mono. Nothing on this page was written by us except this paragraph.

Prerequisites

gh extension list | grep -q 'gh attach' || gh extension install sudosubin/gh-attach

Steps

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.