Claude Code Elixir — Development skill for Claude Code

Claude Code Elixir

Claude Code plugins for Elixir development.

Installation

claude plugin marketplace add georgeguimaraes/claude-code-elixir

Install all plugins:

claude plugin install elixir-lsp@claude-code-elixir && \
claude plugin install mix-format@claude-code-elixir && \
claude plugin install mix-compile@claude-code-elixir && \
claude plugin install mix-credo@claude-code-elixir && \
claude plugin install elixir@claude-code-elixir

Prerequisites

Install the `expert` binary and make sure it's on your PATH. See [installation instructions](https://expert-lsp.org/docs/installation).

**Note:** `mix-format`, `mix-compile`, and `mix-credo` require bash (Git Bash or WSL on Windows).

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Plugins

Overview

Plugin	Type	Description
elixir-lsp	LSP	Language Server with completions, go-to-definition, diagnostics
mix-format	Hook	Auto-format .ex/.exs files on save
mix-compile	Hook	Compile with --warnings-as-errors on save
mix-credo	Hook	Run Credo code quality checks on save
elixir	Skills	BEAM architecture, Phoenix, Ecto, OTP patterns

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Tools

elixir-lsp

Elixir Language Server integration powered by [Expert](https://github.com/elixir-lang/expert).

Feature	Description
Navigation	Go to definition, find references
Completions	With signature help and docs
Diagnostics	Compiler warnings and errors
File types	.ex, .exs, .heex, .leex

mix-format

Auto-runs `mix format` after editing `.ex` and `.exs` files.

mix-compile

Auto-runs `mix compile --warnings-as-errors` after editing `.ex` files.

• Only .ex files (not .exs scripts/tests)
• Finds mix.exs by walking up directories
• Fails on warnings or errors

mix-credo

Auto-runs `mix credo` after editing `.ex` and `.exs` files to check code