greyboard-markdown

Opens Markdown files in the Greyboard desktop application on macOS.

Updated Apr 17, 2026

Search Tags:#markdown #preview #desktop app #macos #mdx #open file #greyboard

Ready to run

npx skills add https://github.com/hpark0011/mirror --skill greyboard-markdown-hpark0011

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: greyboard-markdown
Source: https://github.com/hpark0011/mirror/tree/main/.agents/skills/greyboard-markdown
Command: npx skills add https://github.com/hpark0011/mirror --skill greyboard-markdown-hpark0011

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? When working with Markdown files on macOS, switching between your editor and a dedicated viewer requires manual steps. This Skill lets you open any .md, .mdx, or .markdown file directly in the Greyboard desktop app with a single command. ## Core Features & Use Cases - Direct File Opening: Launches .md, .mdx, and .markdown files in the Greyboard app using the macOS `open` command. - Path Resolution: Automatically resolves relative file paths against the current working directory before opening. - Use Case: You are drafting a README.md in your project and want to preview it in Greyboard. Simply ask to open the file in Greyboard and it launches instantly in the desktop app. ## Quick Start Open the file docs/guide.md in Greyboard.

Frequently Asked Questions about greyboard-markdown

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I open a Markdown file in Greyboard on macOS?▼

Provide the path to your .md, .mdx, or .markdown file and ask to open it in Greyboard. The skill runs the macOS open command with the Greyboard app, resolving relative paths against your current working directory first.

What file formats does Greyboard support for opening?▼

This skill handles .md, .mdx, and .markdown file extensions. These are the standard Markdown document formats that the Greyboard desktop application can display.

Does Greyboard work on Windows or Linux?▼

No, this skill is macOS-only. It relies on the macOS open command and requires Greyboard.app to be installed at /Applications/Greyboard.app.

Why does opening a file in Greyboard fail?▼

The most common cause is that Greyboard.app is not installed at /Applications/Greyboard.app. Also verify the file path exists, since relative paths are resolved against the current working directory before opening.

Can I open Markdown files with relative paths in Greyboard?▼

Yes, relative paths are supported. The skill resolves them against the current working directory ($PWD) to produce an absolute path before passing it to the open command.