---
title: "em dash - Air Market"
description: "Long dashes sneak into comments and data files and cause trouble later. This defaults to never using em or en dashes and swaps any it finds for a plain hyphen. Reach for it when you are writing or re…"
canonical: "https://airmarket.ai/app/em-dash"
---

[Air Market](/) / [Writing](/category/writing) / em dash

Skill by [GitHub](/@github)

# em dash

Keep the long dashes out of your code and your comments

## What this does

Long dashes sneak into comments and data files and cause trouble later. This defaults to never using em or en dashes and swaps any it finds for a plain hyphen. Reach for it when you are writing or reviewing code, comments or data and want that punctuation kept out.

### Top 3 things it does for you

- Replace em and en dashes with plain hyphens
- Check comments and data files for stray dashes
- Ask what a punctuation mark is actually for

## Information

**em dash at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [GitHub](/@github) |
| Category | [Writing](/category/writing) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 9 KB |
| Licence | MIT |
| Repository | [github/awesome-copilot](https://github.com/github/awesome-copilot/tree/16ad744860577c0e5db9ca471e1c3bb483d5aa8d/skills/em-dash) |
| GitHub stars | 38,187 (as of Nov 2026) |
| Installs | 79, counted by skills.sh (Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of em dash and flagged nothing. AIR's verdict: **safe**.

**What em dash's check was run against**

|  |  |
| --- | --- |
| Commit | 16ad744860577c0e5db9ca471e1c3bb483d5aa8d |
| Content hash | 436c678d84a5f9fdb9c48e33ac5f651e2f09f874ff3924c440e569c6768e6ad9 |
| Files read | [Browse the files at this exact commit](https://github.com/github/awesome-copilot/blob/16ad744860577c0e5db9ca471e1c3bb483d5aa8d/skills/em-dash/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for em dash](/security/em-dash)

## About em dash

This is built around the em dash - its history, its origin and its correct use - with the working default being never to use it.

When writing or reviewing code, comments or data files, it avoids em and en dashes and replaces any it finds with a plain hyphen. It also carries broader knowledge of punctuation marks and how to use punctuation characters properly in comments.

## What's inside

- SKILL.md - instructions

## Questions

### Is em dash safe to install?

AIR scanned this exact version of em dash and flagged nothing. AIR's verdict: safe. The verdict is named by the content that was read, at commit 16ad74486057, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/em-dash.

### How do I install em dash?

Open https://airmarket.ai/app/em-dash on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/github/awesome-copilot/tree/16ad744860577c0e5db9ca471e1c3bb483d5aa8d/skills/em-dash. Install from that link, not the branch.

## Related on Air Market

- [More Writing listings](/category/writing)
- [Everything by GitHub](/@github)

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Canonical URL: <https://airmarket.ai/app/em-dash>