elixir-expert

Q: How do I install elixir-expert?

Run npx skills add https://github.com/404kidwiz/claude-supercode-skills --skill elixir-expert in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/elixir-expert/ (personal) or .claude/skills/elixir-expert/ (project).

by 404kidwiz

Expert in Elixir, Phoenix Framework, and OTP. Specializes in building concurrent, fault-tolerant, and real-time applications using the BEAM. Use when building Elixir applications, working with Phoenix, implementing GenServers, or designing distributed systems on the BEAM.

Installs: 268
Last 24h: —
Trending rank: —
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/404kidwiz/claude-supercode-skills --skill elixir-expert

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads elixir-expert automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Elixir Expert

Purpose

Provides expertise in Elixir development, Phoenix Framework, and OTP patterns. Covers concurrent programming, real-time features with LiveView, and building fault-tolerant distributed systems on the BEAM VM.

When to Use

Building Elixir applications
Developing Phoenix web applications
Implementing real-time features with LiveView
Using OTP patterns (GenServer, Supervisor)
Building distributed systems on BEAM
Designing fault-tolerant architectures
Working with Ecto for database access

Quick Start

Invoke this skill when:

Building Elixir applications
Developing Phoenix web applications
Implementing real-time features with LiveView
Using OTP patterns
Designing fault-tolerant systems

Do NOT invoke when:

Building Ruby on Rails apps (use rails-expert)
Building Node.js backends (use javascript-pro)
Building Python backends (use python-pro)
Infrastructure automation (use terraform-engineer)

Decision Framework

Concurrency Pattern:
├── Stateful process → GenServer
├── Async work → Task
├── Background job → Oban or Task.Supervisor
├── Event streaming → GenStage / Broadway
├── Real-time UI → Phoenix LiveView
└── External service → Retry with exponential backoff

Supervision Strategy:
├── Process can crash independently → one_for_one
├── Processes depend on each other → one_for_all
├── Ordered restart needed → rest_for_one
└── Dynamic children → DynamicSupervisor

Core Workflows

1. Phoenix Application Setup

Generate Phoenix project
Configure database with Ecto
Define schemas and migrations
Create contexts for business logic
Build controllers or LiveViews
Add authentication
Deploy with releases

2. OTP Application Design

Identify stateful components
Design supervision tree
Implement GenServers for state
Add proper error handling
Implement graceful shutdown
Test supervision strategies

3. Real-Time with LiveView

Generate LiveView module
Define assigns and state
Implement handle_event callbacks
Use pubsub for broadcasts
Optimize with temporary_assigns
Add JS hooks if needed

Best Practices

Let it crash - design for failure recovery
Use supervision trees for fault tolerance
Keep GenServer state minimal
Use contexts to organize business logic
Prefer immutable data transformations
Test concurrent code with async: true

Anti-Patterns

Anti-Pattern	Problem	Correct Approach
Large GenServer state	Memory and serialization	External storage, ETS
Defensive coding	Hides bugs	Let it crash, supervise
Blocking GenServer	Process bottleneck	Async tasks for I/O
No supervision	Unrecoverable crashes	Proper supervision tree
Mutable mindset	Bugs and race conditions	Embrace immutability

FAQ

What does the elixir-expert skill do?

How do I install elixir-expert?

Run npx skills add https://github.com/404kidwiz/claude-supercode-skills --skill elixir-expert in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/elixir-expert/ (personal) or .claude/skills/elixir-expert/ (project).

Which AI agents can use elixir-expert?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is elixir-expert safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains elixir-expert?

It is published by 404kidwiz in 404kidwiz/claude-supercode-skills. It has 268 recorded installs.