caseyWebb

Elm Claude Plugin

A Claude Code plugin that provides tools for working with Elm.

Skills

• elm-packages - Query the Elm package registry, list project dependencies, and read package documentation

Prerequisites

• curl - for fetching package data from package.elm-lang.org
• jq - for parsing JSON (install via brew install jq on macOS)
• elm-language-server - for LSP features (install via npm install -g @elm-tooling/elm-language-server)

Installation

Option 1: Add as marketplace

/plugin marketplace add caseyWebb/elm-claude-plugin
/plugin install elm@caseyWebb

Option 2: Clone directly

git clone https://github.com/caseyWebb/elm-claude-plugin ~/.claude/plugins/elm

Then restart Claude Code.

Usage

The skill is automatically triggered when you ask about:

• Elm packages or dependencies
• elm.json contents
• Package documentation
• Function signatures in Elm packages

Example prompts

• "What packages are installed in this Elm project?"
• "Search for Elm packages that handle JSON decoding"
• "What functions does elm/core's List module export?"
• "Show me the documentation for List.map"

How it works

The plugin teaches Claude how to:

1. Read elm.json directly - Claude parses the JSON natively for listing dependencies
2. Run shell scripts - For network operations and efficient JSON extraction:
   • list-installed-packages.sh - Lists dependencies from elm.json
   • search-packages.sh - Queries package.elm-lang.org/search.json
   • fetch-package.sh - Downloads package docs to cache
   • get-exports.sh - Extracts module exports (compact, no docs)
   • get-export-docs.sh - Extracts single export with full documentation
   • get-readme.sh - Reads package README documentation

The scripts use jq to filter large JSON files, keeping token usage efficient.

Cache

Package data is cached at ~/.elm/0.19.1/packages/{author}/{name}/{version}/

This matches the standard Elm tooling cache location, so packages installed via elm install are already available.

License

MIT