Open-source alternatives to Pre Commit Hooks

Prek is a Git hook manager written in Rust that runs configured hooks as a single binary without requiring Python or other external runtimes. It executes hooks faster than standard tools through parallel processing and bundled Rust implementations, and includes a built-in hook repository that enables fully offline operation without network access or environment setup. The tool supports both TOML and YAML configuration formats with identical semantics, and can run hooks from existing pre-commit configuration files without modification. Prek distinguishes itself through workspace-aware monorepo

Prettier is an opinionated code formatter that parses source code and reprints it from scratch to enforce a consistent, project-wide visual style. By transforming code into an abstract syntax tree and applying a recursive document printing process, it eliminates manual style debates and ensures that all source files adhere to a unified appearance. The project is distinguished by its extensible, plugin-based architecture, which decouples language-specific parsing logic from the core engine. This modular design allows for uniform style enforcement across diverse programming languages and comple

Anthony's ESLint config preset

RuboCop is a static code analyzer and linter for Ruby. It functions as a static analysis tool designed to detect potential bugs, identify style violations, and improve overall code quality in Ruby projects. The project provides an automated code formatter that rewrites source code to align with established community standards. It also implements a language server protocol to surface linting and formatting errors directly within text editors. Its capabilities cover automated code linting and the analysis of Ruby code style to ensure consistency across a project. These functions are driven by

Standard is a suite of static analysis tools for JavaScript, comprising a linter, formatter, and a predefined style guide. It functions as a static code analyzer that scans source code for style violations and potential errors without executing the program. The project provides an automatic code fixer that rewrites source code to resolve formatting issues and enforce syntax consistency. It implements a standardized set of rules for JavaScript formatting and syntax to ensure a uniform appearance across different projects. The system covers a wide range of static analysis capabilities, includi

This project is a collection of Swift coding standards and static analysis rules designed to ensure consistency across Swift projects. It provides a defined set of naming conventions and structural guidelines to maintain a shared style for teams. The repository centers on a SwiftLint configuration used to automate the detection and correction of style violations in source code. This configuration enables automated style enforcement, ensuring that code adheres to organizational standards without requiring manual review. The guidelines cover the standardization of code formatting, naming, and

pycodestyle is a Python code quality utility that checks source files against the PEP 8 style guide, reporting deviations as a static analysis tool. Its primary function is to enforce consistent code formatting by scanning files and flagging violations with precise line and column numbers for direct integration into editors or workflows. The tool combines token-based pattern matching with abstract syntax tree (AST) context enrichment, enabling it to evaluate both surface-level formatting and deeper structural patterns. Its architecture supports custom validation rules through a plugin interfa

Standard is a zero-configuration static analyzer, linter, and formatter for JavaScript. It functions as a style guide that enforces consistent coding rules and identifies programming errors without requiring manual configuration files. The tool distinguishes itself by providing an automatic code fixer that scans source files to correct style violations and ensure a uniform codebase. It implements a predefined rule set to eliminate the need for project-specific configuration. The project covers a broad range of static analysis capabilities, including support for experimental language syntax a

This project is a command line package manager and dependency management engine used for installing, updating, and removing software packages across different operating systems. It functions as a package recipe system and software repository administrator, utilizing declarative scripts to define software sources, build arguments, and installation steps. The system operates as a binary distribution platform that compiles source code into pre-compiled binaries and distributes them through remote repositories. It includes an automated version tracker that monitors upstream software releases and

Oils is a Unix shell interpreter and scripting language runtime that combines a modern shell language with POSIX and Bash compatibility. It functions as a structured data shell, integrating JSON and J8 formats to manage complex data without relying on string parsing. The system is distinguished by a C++ transpiled interpreter that converts a subset of Python source code into strongly typed C++ for high-performance execution. It features a garbage-collected typed runtime that supports prototype-based polymorphism, lexical closures, and reference-based variable mutation. To decouple shell logic

DevOps-Bash-tools is a collection of shell scripts and aliases designed to automate cloud infrastructure, container orchestration, and CI/CD pipelines. It provides a comprehensive toolset for managing operational workflows through the command line. The project specializes in automating tasks across multiple platforms, including managing namespaces and secrets in Kubernetes, auditing resources in AWS and GCP, and triggering builds or managing environment variables in GitHub Actions, GitLab CI, and CircleCI. It also includes a toolkit for interacting with container registries to query manifests

GitUI is a terminal-based interface for managing Git repositories, providing an interactive environment for executing version control operations, inspecting commit logs, and navigating file hierarchies. It functions as a keyboard-driven client that allows users to stage changes, manage branches, and review project history directly from the command line. The application distinguishes itself through a focus on interface responsiveness and user-defined workflows. It utilizes background thread offloading and asynchronous data caching to maintain performance during complex operations, while offeri

Janus is a Vim distribution and curated plugin configuration that transforms the editor into a full-featured development environment. It functions as a Vim-based IDE, integrating a collection of third-party extensions to provide an integrated development experience. The system features a fuzzy-search project navigator for locating files, buffers, and symbols across a codebase. It also includes a Git-integrated workflow that provides real-time diff visualization in the sign column and allows users to stage hunks and manage version control directly within the editor. The environment covers bro

Checkstyle is a Java static analysis tool and linter designed to identify and enforce coding standards and best practices. It functions as a code quality auditor and Javadoc validation tool, checking source code against configurable rulesets to ensure structural and stylistic consistency. The project allows for the creation of custom linting rules by extending a core API to inspect the abstract syntax tree. It further enables specialized validation through the use of XPath expressions to query the syntax tree for specific code patterns and violations. Capability areas include the enforcement

This is an interactive Python tutorial delivered as a collection of Jupyter notebooks. It is designed as a structured learning path for beginners, teaching fundamental language concepts through a sequence of lessons that combine explanatory text with runnable code cells and embedded practice exercises. Each notebook is a self-contained unit that introduces a topic, demonstrates it with a minimal code example, and then asks the learner to write code themselves, receiving immediate feedback from the browser-based execution environment. The curriculum is built on a progressive concept-stacking mo

mini.nvim is a comprehensive library of independent modules designed to extend Neovim with a wide array of navigation, user interface, and text manipulation tools. It serves as a modular plugin collection, a UI toolkit for creating custom statuslines and notifications, and a package manager for installing and pinning external plugins from Git. The project provides a specialized fuzzy picker framework for filtering files and symbols, an LSP completion engine with interactive snippet expansion, and a dedicated plugin test framework that uses headless editor instances and remote procedure calls

Agent-skills is a collection of structured instructions and behavioral personas designed to standardize how AI coding agents perform engineering tasks. It functions as a workflow orchestrator that maps natural language intent to repeatable technical sequences and verification checklists. The project distinguishes itself through the use of specialized markdown-defined roles, such as security auditors or test engineers, to apply targeted domain expertise. It employs an evidence-based verification model that requires runtime data or passing tests as mandatory exit criteria to ensure AI-generated

This project provides a comprehensive collection of standardized conventions and architectural patterns designed to maintain consistent code quality, secure workflows, and project stability. It serves as a structured guide for implementing engineering processes, including automated testing, dependency management, and environment configuration across diverse software development lifecycles. The framework distinguishes itself by offering a unified approach to version control and interface design. It enforces linear development practices through standardized commit messages and branch protection

30-seconds-of-code is a comprehensive knowledge base and programming snippet library designed to support software engineering education and professional development. It provides a curated collection of reusable code units and technical guides that help developers master core language mechanics, design patterns, and architectural philosophies. The project distinguishes itself by offering a wide-ranging library of algorithmic solutions and web development patterns that are organized into modular, independently testable units. It emphasizes functional programming paradigms and declarative logic,

This project is a static analysis engine and type checker designed for PHP codebases. It evaluates source code structure and type annotations to identify potential bugs, type mismatches, and logic errors without executing the application. By parsing code into an abstract syntax tree and applying a rule-based validation framework, it enforces code quality and safety standards across a project. What distinguishes this tool is its sophisticated type inference engine, which models dynamic language features, magic methods, and conditional types to maintain accuracy even in unconventional code. It

Mago is a PHP static analysis tool, linter, and code formatter. It detects type errors, dead code, and logic bugs through advanced type inference and flow analysis, while providing a deterministic engine to rewrite source files according to style guides. The project distinguishes itself with a WebAssembly runtime that enables PHP analysis to execute entirely within a web browser, allowing results to be shared via URL. It also provides a minimal Dockerized toolchain distributed as a scratch image for consistent execution across different processor architectures. The toolset covers architectur

Lefthook is a Git hook manager and workflow automation tool designed to execute user-defined scripts during version control events. It automates the execution of linters, tests, and formatters to validate changes and maintain code quality before commits or pushes. The project distinguishes itself through a parallel execution model that runs multiple shell commands concurrently to reduce latency. It supports complex configuration management, including the ability to merge global, remote, and local settings and synchronize configurations from external repositories to standardize development env

This project is a static analysis runner designed to identify bugs, performance bottlenecks, and stylistic inconsistencies within Go codebases. It functions as a comprehensive quality assurance suite that executes multiple analysis tools concurrently to provide a unified diagnostic report. By parsing source code into a structured representation, the tool enforces coding standards, validates import structures, and ensures consistent formatting across entire projects. The tool distinguishes itself through its ability to automate the remediation of identified issues, applying programmatic fixes

This project is a comprehensive, curated directory of static analysis, linting, and security scanning utilities. It serves as a central resource for developers to discover, compare, and select tools based on specific programming languages, licensing models, and integration requirements. The directory distinguishes itself by providing deep metadata for each listed utility, including community-driven popularity rankings, maintenance status, and deployment methods. By aggregating these tools into a single searchable index, it enables teams to identify solutions for enforcing coding standards, ma

sd is a command line text manipulation utility designed for searching and replacing text patterns across multiple files. It functions as a regex-based find and replace tool that allows for in-place file editing directly from the terminal. The project supports both regular expression replacements, including the use of capture groups for complex transformations, and fixed string replacement for literal text substitutions. It specifically handles multi-line text replacement by processing file contents as single blocks to match patterns that span across newline characters. The tool provides capa

SQLFluff is a multi-dialect SQL linter, formatter, and style guide enforcer. It functions as a parser and analyzer that converts SQL scripts into structured trees to validate syntax, identify logical components, and enforce consistent capitalization, aliasing, and layout conventions across various database dialects. The system is specifically designed to handle templated SQL, providing the ability to analyze, parse, and lint files containing macros or placeholders. It uses dummy-parameter rendering and source mapping to validate the style and correctness of dynamic code before it is rendered