How do I enable a custom check after creating it?

You must include the check's module name and any required parameters in the 'checks' section of your project's .credo.exs configuration file.

Why would I need custom Credo checks?

Custom checks allow you to automate the enforcement of project-specific rules, such as internal security policies or architectural constraints, that standard linters do not cover.

What is Credo in Elixir?

Credo is a static code analysis tool for the Elixir language that focuses on code consistency, teaching, and finding common errors.

Do I need to understand Elixir AST to use this?

While Credo operates on the AST, this skill provides the necessary implementation patterns and traverse functions to make creating checks accessible even without deep AST expertise.

Can this skill help find security vulnerabilities?

Yes, it provides templates for creating checks that detect patterns like hardcoded secrets, unsafe function calls, or unauthorized configuration patterns.

Elixir Credo Custom Checks

Name: Elixir Credo Custom Checks
Author: TheBushidoCollective

byTheBushidoCollective

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Security & Testing

Generates and implements custom Credo rules to enforce project-specific code quality and security standards in Elixir applications.

This skill empowers Elixir developers to extend the Credo static analysis tool by creating bespoke linting rules tailored to their project's unique requirements. It provides specialized guidance on implementing the Credo.Check behavior, leveraging AST pattern matching to identify anti-patterns, and integrating these rules into the project configuration. Whether you need to prevent the use of specific functions, detect hardcoded secrets, or enforce strict architectural boundaries, this skill automates the process of maintaining a professional and secure codebase.

Key Features

01Project-specific security rule enforcement

0239 GitHub stars

03AST pattern matching for deep code analysis

04Automated code quality auditing

05Custom Credo check module generation

06Seamless .credo.exs configuration integration

Use Cases

01Deprecating specific library functions across a large Elixir monorepo

02Detecting and preventing hardcoded secrets or API keys in source files

03Enforcing internal architectural patterns and module naming conventions

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add thebushidocollective/han credo-custom-checks

For use in Claude.ai and ChatGPT

Download Skill