Automated summary
Provides expert guidance on writing idiomatic Elixir code with OTP patterns, supervision trees, Phoenix LiveView, and BEAM optimization for concurrent, fault-tolerant distributed systems.
Strengths
- Deep knowledge of OTP design principles and supervision strategies.
- Expertise in Phoenix LiveView real-time features.
- Emphasis on performance profiling and optimization on BEAM.
- Use of property-based testing and dialyzer for robust code.
Limitations
- May be too advanced for beginners.
- Focuses primarily on OTP and Phoenix, potentially overlooking other Elixir libraries.
- Assumes familiarity with Elixir syntax and BEAM concepts.
Use when building or refactoring Elixir applications that require robust concurrency, fault tolerance, or real-time web features.
Do not use for simple scripts, rapid prototyping in other languages, or tasks that do not involve Elixir or the BEAM ecosystem.
Security analysis
SafeThe skill is a set of instructional guidelines for writing Elixir code using OTP, Phoenix, and related tools. It does not declare or use any tools (e.g., shell, network) and contains no commands or patterns that could lead to destructive or exfiltrating actions.
No concerns found
How this analysis is madeExamples
I have a GenServer that manages a pool of workers. Currently it uses a single process. How can I refactor it to use a dynamic supervisor with proper child specification and fault tolerance?Design a real-time chat component using Phoenix LiveView that supports multiple rooms, presence tracking, and persistence with Ecto.My Elixir application has high latency under load. Use :observer and :recon to identify bottlenecks and suggest optimizations.name: elixir-pro description: "Write idiomatic Elixir code with OTP patterns, supervision trees," and Phoenix LiveView. Masters concurrency, fault tolerance, and distributed systems. Use PROACTIVELY for Elixir refactoring, OTP design, or complex BEAM optimizations. metadata: model: inherit risk: unknown source: community
Use this skill when
- Working on elixir pro tasks or workflows
- Needing guidance, best practices, or checklists for elixir pro
Do not use this skill when
- The task is unrelated to elixir pro
- You need a different domain or tool outside this scope
Instructions
- Clarify goals, constraints, and required inputs.
- Apply relevant best practices and validate outcomes.
- Provide actionable steps and verification.
- If detailed examples are required, open
resources/implementation-playbook.md.
You are an Elixir expert specializing in concurrent, fault-tolerant, and distributed systems.
Focus Areas
- OTP patterns (GenServer, Supervisor, Application)
- Phoenix framework and LiveView real-time features
- Ecto for database interactions and changesets
- Pattern matching and guard clauses
- Concurrent programming with processes and Tasks
- Distributed systems with nodes and clustering
- Performance optimization on the BEAM VM
Approach
- Embrace "let it crash" philosophy with proper supervision
- Use pattern matching over conditional logic
- Design with processes for isolation and concurrency
- Leverage immutability for predictable state
- Test with ExUnit, focusing on property-based testing
- Profile with :observer and :recon for bottlenecks
Output
- Idiomatic Elixir following community style guide
- OTP applications with proper supervision trees
- Phoenix apps with contexts and clean boundaries
- ExUnit tests with doctests and async where possible
- Dialyzer specs for type safety
- Performance benchmarks with Benchee
- Telemetry instrumentation for observability
Follow Elixir conventions. Design for fault tolerance and horizontal scaling.
From the file to a first result
The download contains exactly the content displayed on this page. This copy may differ from the latest version in the source repository.
View the source and supporting filesThis download contains SKILL.md only. Any scripts, references, templates and dependencies are not included. Get the required files from the source, preserving their directory structure, before continuing.
1. Download the file
Download SKILL.mdFrom the root of a test project, save the file as .skill-downloads/elixir-pro-mrzxuq80/SKILL.md, or use the command below. This folder is for inspecting the skill before installation.
Command for macOS/Linux or WSL: requires a POSIX shell and curl. On Windows without WSL, use the download button and create the folder manually.
mkdir -p '.skill-downloads/elixir-pro-mrzxuq80' && curl --fail --show-error --location 'https://skills-guides.com/api/skills/elixir-pro-mrzxuq80/download' --output '.skill-downloads/elixir-pro-mrzxuq80/SKILL.md.part' && mv '.skill-downloads/elixir-pro-mrzxuq80/SKILL.md.part' '.skill-downloads/elixir-pro-mrzxuq80/SKILL.md'2. Check prerequisites
Read SKILL.md before using it. If it references scripts or external services, inspect them and prepare the required access in your test environment.
No recognized prerequisites section in this file. This does not mean it is self-contained: libraries, tools and access requirements may be mentioned elsewhere in the content or source repository.
The platforms on this page are catalog indications. The paths below follow tool documentation; they do not prove this skill has been run in those tools. No minimum tool version is confirmed for this listing.
3. Load the skill
This file does not provide a usable name/description header for this native procedure. It remains available to download and inspect; use the manual method below.
Manual method or another tool: attach SKILL.md to a conversation, or open it in an agent that can read files. Include any required supporting resources. No universal folder is recognized by every tool.
4. Try a first task
Use a short, synthetic input: an API endpoint, a small document or an interface brief. In a new conversation, attach the file or give the agent its path, then adapt this request:
Read .skill-downloads/elixir-pro-mrzxuq80/SKILL.md and apply its instructions to this example: [describe a test input]. Identify any missing files, dependencies or access. Produce the result requested by the skill without inventing data or running unreviewed scripts.Expected result: output matching the skill instructions, or a precise list of missing prerequisites. A read confirmation alone does not validate a first use. If an external resource is unavailable, that path remains untested.
React Hook Form Best Practices
Development
Master React Hook Form: avoid anti-patterns, manage subscriptions, and handle reset, dirty state, and controlled inputs correctly.
Emotion to Mantine Migration
Development
Migrate Emotion styled-components to Mantine components with style props and CSS modules. Use when converting .styled.tsx files or removing @emotion imports.
Scope Creep Detector
Development
Analyzes git diffs against a stated intent to detect scope creep, unrelated files, broad PRs, and oversized changes, then suggests keep, split, or justify actions.