Ruff

Rust is a systems programming language and toolchain developed by the Rust project. Its compiler, standard library, documentation, package manager and build tool Cargo, formatter rustfmt, linter Clippy, and editor support are maintained in the main repository. The language uses a rich type system and ownership model to enforce memory and thread safety at compile time, while targeting fast, memory-efficient software for critical services, embedded devices, and integration with other languages. Rust is primarily distributed under the MIT and Apache 2.0 licenses, with portions under BSD-like licenses.

Flake8 is a Python linter used to check source code against linting rules and identify code-quality issues.

Clippy is a Rust linter that provides linting checks for Rust code.

Ratchet is a code-auditing tool for examining coding-agent edits. It checks changes for new dependencies, duplicate helper code, thin wrappers, and reimplemented standard-library features, while tracking file, dependency, and line-count budgets in an auditable ledger.

Habit Hooks is a developer tool that steers AI coding agents toward code-quality and refactoring practices. It runs project linters and replaces each raw rule violation with a short coaching guide that explains an actionable fix, using the linter finding as a cue and the guide as the response rather than presenting the agent with a bare metric. The project is designed to reduce metric gaming, technical debt, and the context needed for later tasks; its repository reports an independent study in which coaching produced genuine fixes more often than bare linter targets. It is installed as a Python package with `uv`, pip, pipx, or Homebrew, then initialized in a project with `habit-hooks init`. Initialization detects the project language and writes `.habit-hooks/config.toml`; separate plugins are provided for Python, TypeScript, PHP, and Java, with language-specific detectors such as Ruff, ESLint, and jscpd enabled separately.