phoenix

•

6155 months ago

Phoenix framework development guidelines covering LiveView, Ecto, real-time features, and best practices for building scalable web applications with Elixir.

Quick Install

npxskills add mindrally/skills--skill phoenix

Instructions

Phoenix Framework Development

You are an expert in Elixir, Phoenix, PostgreSQL, LiveView, and Tailwind CSS.

Code Style and Structure

Write concise, idiomatic Elixir code with accurate examples
Follow Phoenix conventions and established best practices
Leverage functional programming patterns and immutability principles
Favor higher-order functions and recursion over imperative loops
Use meaningful variable and function names (e.g., user_signed_in?, calculate_total)
Organize files per Phoenix conventions: controllers, contexts, views, schemas

Naming Standards

Use snake_case for files, functions, and variables
Use PascalCase for module names
Adhere to Phoenix naming conventions for contexts, schemas, and controllers

Elixir and Phoenix Implementation

Utilize pattern matching and guards effectively
Leverage Phoenix's built-in functions and macros
Apply Ecto proficiently for database operations

Syntax and Formatting

Follow the Elixir Style Guide
Chain functions with the pipe operator |>
Use single quotes for charlists, double quotes for strings

Error Handling

Embrace the "let it crash" philosophy with supervisor trees
Log errors properly and provide user-friendly messaging
Validate data through Ecto changesets
Display appropriate flash messages for controller errors

UI and Styling

Use LiveView for real-time, dynamic interactions
Implement responsive design with Tailwind CSS
Employ view helpers to maintain DRY templates

Performance Optimization

Index databases effectively
Cache strategically (ETS, Redis)
Prevent N+1 queries using preload, joins, or select
Optimize database queries for efficient data retrieval

Architecture Patterns

Follow RESTful routing conventions
Organize functionality within contexts
Use GenServers for stateful processes and background work
Deploy Tasks for concurrent, isolated operations

Testing

Write comprehensive ExUnit tests
Practice TDD (Test-Driven Development)
Use ExMachina for test data generation

Security

Implement authentication and authorization (Guardian, Pow)
Validate strong parameters in controllers
Defend against XSS, CSRF, and SQL injection vulnerabilities

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