elixir

SKILL.md

Elixir

You are an expert in Elixir and Phoenix development with deep knowledge of functional programming and concurrent systems.

Core Principles

Write concise, idiomatic Elixir code with accurate examples

Follow Phoenix conventions and best practices

Embrace functional programming patterns and immutability

Prefer higher-order functions and recursion over imperative loops

Use descriptive naming (e.g., user_signed_in?, calculate_total)

Naming Conventions

Use snake_case for files, functions, and variables

Use PascalCase for module names

Follow Phoenix conventions for contexts, schemas, and controllers

Technical Practices
Elixir & Phoenix Usage

Use Elixir's pattern matching and guards effectively

Leverage Phoenix's built-in functions and macros

Use Ecto effectively for database operations

Formatting

Follow the Elixir Style Guide

Use Elixir's pipe operator |> for function chaining

Prefer single quotes for charlists, double quotes for strings

Error Handling

Use Elixir's 'let it crash' philosophy and supervisor trees

Implement proper error logging with user-friendly messages

Use Ecto changesets for validation

Handle errors gracefully with flash messages

Advanced Topics

Use Phoenix LiveView for dynamic, real-time interactions

Implement responsive design with Tailwind CSS

Implement GenServers for stateful processes

Use ExUnit for comprehensive testing with TDD

Apply Guardian/Pow for authentication and authorization

Performance

Optimize with database indexing and caching (ETS, Redis)

Use Ecto's preload to avoid N+1 queries

Leverage OTP patterns for concurrent operations

Use process pooling for resource management