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userscript-development

v1.1.0

Develop, test, and publish Tampermonkey/Greasemonkey userscripts — scaffolding, in-browser validation via Claude in Chrome, README generation, and version bumping.

Claude Code8 Skills

By Daniel RosehillLicense: MIT0 GitHub starsUpdated 2 months ago

Directory evidence

Runtimes
Claude Code
Parsed components
8 skill or MCP entries
Source updated
Jul 23, 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 userscript-development 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 userscript-development@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/danielrosehill/Claude-Userscript-Development-Plugin

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

Plugin files

userscript-development/
├── .claude-plugin/plugin.json
├── skills/bump-version/SKILL.md
├── skills/docs-lookup/SKILL.md
├── skills/generate-readme/SKILL.md
├── skills/new-userscript/SKILL.md
├── skills/new-userscript-repo/SKILL.md
├── skills/onboard/SKILL.md
├── skills/publish-userscript/SKILL.md
└── skills/test-userscript/SKILL.md

Included Skills8

bump-versionskills/bump-version/SKILL.md

Bump a userscript's `@version` (semver), update README, commit, tag, and push. Tampermonkey only auto-updates installed scripts when `@version` increases — forgetting this means users never receive fixes.

docs-lookupskills/docs-lookup/SKILL.md

Look up Tampermonkey documentation — metadata keys (`@match`, `@grant`, `@run-at`, etc.), the GM_* / GM.* API, and configuration. Fetches the official docs page on demand to stay current.

generate-readmeskills/generate-readme/SKILL.md

Generate or refresh a userscript repo's README.md from its `==UserScript==` metadata block — install button, what it does, supported sites, version, license. Idempotent; safe to re-run after metadata changes.

new-userscriptskills/new-userscript/SKILL.md

Scaffold a new Tampermonkey userscript with a complete `==UserScript==` metadata block, sensible defaults, and a starter IIFE body. Drops it in the user's userscripts base directory if configured, otherwise asks where to place it.

new-userscript-reposkills/new-userscript-repo/SKILL.md

Set up a brand-new development workspace for a single userscript. Asks public or private, creates the GitHub repo with the chosen visibility, installs this plugin at project scope inside it, and ends. The user opens that repo in a fresh Claude Code session and starts authoring the script with `new-userscript`.

onboardskills/onboard/SKILL.md

First-run setup for userscript-development. Optionally records the user's userscript repos base directory so other skills can default new userscripts there. Skipping is fine — the plugin works without it.

publish-userscriptskills/publish-userscript/SKILL.md

Publish a userscript to GitHub so it can be installed via Tampermonkey's "Install from URL" using the raw GitHub URL. Wires up `@updateURL` and `@downloadURL` in the metadata block, commits, and pushes.

test-userscriptskills/test-userscript/SKILL.md

Validate a userscript end-to-end in a real Chrome tab via the Claude in Chrome MCP. Loads the target page, simulates the script's effect, reads console logs and DOM state, and reports whether the script's behavior matches its `@description`.

Plugin manifests1

.claude-plugin/plugin.json
{
  "name": "userscript-development",
  "version": "1.1.0",
  "description": "Develop, test, and publish Tampermonkey/Greasemonkey userscripts — scaffolding, in-browser validation via Claude in Chrome, README generation, and version bumping.",
  "author": {
    "name": "Daniel Rosehill",
    "url": "https://github.com/danielrosehill"
  },
  "repository": "https://github.com/danielrosehill/Claude-Userscript-Development-Plugin",
  "license": "MIT",
  "keywords": [
    "userscript",
    "tampermonkey",
    "greasemonkey",
    "browser",
    "automation",
    "web"
  ]
}

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.

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