Skillget

claude-code-elixir

skill
Guvenlik Denetimi
Gecti
Health Gecti
  • License — License: Apache-2.0
  • Description — Repository has a description
  • Active repo — Last push 0 days ago
  • Community trust — 146 GitHub stars
Code Gecti
  • Code scan — Scanned 12 files during light audit, no dangerous patterns found
Permissions Gecti
  • Permissions — No dangerous permissions requested
Purpose
This skill provides a suite of development plugins for Claude Code, specifically focused on Elixir, Phoenix, and OTP development. It integrates Language Server Protocol (LSP) features, auto-formatting, and code quality checks directly into the AI coding workflow.

Security Assessment
The overall risk is Low. The tool acts primarily as a bridge to execute local Elixir shell commands (such as `mix format`, `mix compile`, and `mix credo`) and interact with a local LSP server. The light code audit scanned 12 files and found no dangerous patterns, hardcoded secrets, or requests for overly broad permissions. Because it runs local CLI tools, its scope is strictly limited to the local development environment. It does not appear to make external network requests or access sensitive data beyond your project's source code.

Quality Assessment
The project is healthy and actively maintained, with recent updates pushed within the last day. It uses the permissive and standard Apache-2.0 license. Community trust is solid for a niche development tool, boasting 146 GitHub stars. The README is well-documented, clearly outlining installation steps, prerequisites, and exactly what each plugin does.

Verdict
Safe to use.
SUMMARY

Claude Code plugin marketplace for Elixir development

README.md

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.

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

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

Tools

elixir-lsp

Elixir Language Server integration powered by 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 quality.

  • Runs on both .ex and .exs files
  • Uses project's default Credo configuration
  • Gracefully skips if Credo is not installed
  • Fails on code quality issues

Skills

elixir

Paradigm-shifting skills for Elixir, Phoenix, and OTP development. Includes a SessionStart hook that auto-suggests skills when working on Elixir code.

Included skills:

Skill Use When
elixir-thinking Designing modules, processes, data structures
phoenix-thinking Working with Phoenix, LiveView, PubSub
ecto-thinking Working with Ecto, contexts, schemas
otp-thinking Implementing GenServers, supervisors, Tasks
elixir-thinking

Mental models for writing Elixir — how it differs from OOP.

Concept Insight
Iron Law NO PROCESS WITHOUT A RUNTIME REASON
Three dimensions Behavior, state, mutability are decoupled
Processes For runtime (state/concurrency/faults), not code organization
"Let it crash" Means "let it heal" — supervisors restart
Polymorphism Behaviors → Protocols → Message passing (least to most dynamic)
Sources
phoenix-thinking

Architectural patterns for Phoenix and LiveView.

Concept Insight
Iron Law NO DATABASE QUERIES IN MOUNT
Scopes (1.8+) Security-first authorization threading
mount vs handle_params mount = setup, handle_params = data
PubSub Scoped topics, broadcast_from to avoid self-broadcast
Channel fastlane Socket state can be stale — re-fetch or include in broadcast
Sources
ecto-thinking

Architectural patterns for Ecto and contexts.

Concept Insight
Contexts Bounded domains with their own "dialect"
Cross-context refs Use IDs, not belongs_to associations
Schemas Multiple changesets per schema, embedded_schema for forms
Preloads Separate vs join — pick based on data shape
pool_count vs pool_size pool_count = DBConnection pools, pool_size = connections per pool
Sources
otp-thinking

OTP design patterns and when to use each abstraction.

Concept Insight
Iron Law GENSERVER IS A BOTTLENECK BY DESIGN
ETS Bypasses bottleneck — concurrent reads with :read_concurrency
Task.Supervisor THE pattern for async work (not raw Task.async)
Registry + DynamicSupervisor Named dynamic processes without atom leaks
Broadway vs Oban External queues vs background jobs — different problems
Sources

Known Issues

elixir-lsp: client/registerCapability workaround. Claude Code's LSP client doesn't respond to client/registerCapability requests that Expert sends during initialization (anthropics/claude-code#32595). The plugin includes a Python wrapper (expert-wrapper) that intercepts these requests and auto-responds so Expert can initialize properly. The wrapper will be removed once the upstream fix lands. Requires Python 3 on PATH.

Troubleshooting

expert not found: Ensure the expert binary is on your PATH. See installation instructions.

License

Copyright (c) 2025 George Guimarães

Licensed under the Apache License, Version 2.0. See LICENSE for details.

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