Installation

Install with CLI Recommended 
gh skills-hub install gh-attach

Don't have the extension? Run gh extension install samueltauil/skills-hub first.

Download and extract to your repository:

.github/skills/gh-attach/

Extract the ZIP to .github/skills/ in your repo. The folder name must match gh-attach for Copilot to auto-discover it.

Skill Files (1)

SKILL.md 2.1 KB 
---
name: gh-attach
description: '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`.'
---

# 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

```sh
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:

```sh
URL=$(gh attach "$FILE" -R <owner>/<repo>)
```

**2. Embed** (always `--body-file -`, e.g. `gh pr comment/edit`, `gh issue comment/edit`):

```sh
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:

```sh
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.

License (MIT)

MIT Source: github/awesome-copilot
View full license text 
MIT License

Copyright GitHub, Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.