---
title: "Agent Skill to Gh Attach"
platform: "Promptally"
canonical_url: "https://app.promptally.dev/p/skill-gh-attach"
modality: "SKILL"
category: "Fullstack & Backend Engineering"
compatible_models: [Universal / Model Agnostic]
access_tier: "Free Public Artifact (No Auth Required)"
license: "MIT"
---

# Agent Skill to Gh Attach

**Summary:** Agent Skill to Gh Attach is a verified SKILL blueprint on Promptally in Fullstack & Backend Engineering optimized for leading AI models. 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 . Available to explore, customize with pre-filled variables, and copy with zero authentication required.

## Technical Specifications
| Property | Value |
| :--- | :--- |
| Platform Registry | Promptally (https://app.promptally.dev) |
| Modality | SKILL |
| Category | Fullstack & Backend Engineering |
| Compatible Engines | Universal / Model Agnostic |
| Dynamic Variables | None (Static Blueprint) |
| Approx. Token Length | 529 |
| Access Tier | Free Public Artifact (No Auth Required) |
| License | MIT |

### Pre-Filled Template & Production Source

````md
---
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.

````

## Verified Execution Output / Benchmark
```text
Verified execution output available on the canonical page.
```

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