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blue-pencil

v0.3.0

Review markdown documents against a spec, revise them until they pass, and write and tune specs: the Blue Pencil MCP server, a local server that reviews files on disk, and the skill.

Claude Code1 Skill2 MCP serversStreamable HTTPstdio

By Spectacular AI0 GitHub starsUpdated 1 hour ago

Directory evidence

Runtimes
Claude Code
Parsed components
3 skill or MCP entries
Source updated
Sep 27, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install blue-pencil for Claude Code

Installs for the current user
claude plugin marketplace add IchenDEV/agent-plugin-mkt
claude plugin marketplace update agent-plugin-marketplace
claude plugin install blue-pencil@agent-plugin-marketplace

Paste and run these commands in a terminal with Claude Code. They add and refresh the PluginsMP catalog, then install this plugin.

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/Spectacular-AI/blue-pencil-marketplace

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The plugin root is plugins/blue-pencil/.

Plugin files

plugins/blue-pencil/
├── .claude-plugin/plugin.json
├── skills/blue-pencil/SKILL.md
└── .mcp.json

Included Skills1

blue-pencilskills/blue-pencil/SKILL.md

Blue Pencil: review a markdown document against a spec. Use when reviewing a document, revising one until it passes, writing a spec for a kind of document, or tuning a spec against example documents.

MCP servers2

blue-pencilStreamable HTTP
url
https://blue-pencil-nu.vercel.app/api/mcp
blue-pencil-filesstdio
command
node
args
${CLAUDE_PLUGIN_ROOT}/server/dist/blue-pencil-files.mjs

MCP configuration uses runtime-provided plugin path placeholders such as ${PLUGIN_ROOT} or ${CLAUDE_PLUGIN_ROOT}. Review the manifest for the runtime-specific expansion rules.

Plugin manifests1

plugins/blue-pencil/.claude-plugin/plugin.json
{
  "name": "blue-pencil",
  "version": "0.3.0",
  "displayName": "Blue Pencil",
  "description": "Review markdown documents against a spec, revise them until they pass, and write and tune specs: the Blue Pencil MCP server, a local server that reviews files on disk, and the skill.",
  "author": {
    "name": "Spectacular AI"
  },
  "homepage": "https://blue-pencil-nu.vercel.app"
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[blue-pencil on Agent Plugins Marketplace](https://pluginsmp.com/plugins/blue-pencil)