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#linting (4)

Cheat sheets (4)

Biome — One toolchain for lint, format, and import sorting

Rust-based all-in-one linter and formatter for JS/TS/JSON/CSS/GraphQL. Single binary, single config, 10-100x faster than ESLint+Prettier.
javascript biome linting formatting tooling

shellcheck — Shell Script Linter

Catch quoting bugs, missing checks, and POSIX portability mistakes in shell scripts. Covers every flag, severity levels, inline directives, CI/pre-commit integration, and the most common rules.
shellcheck shell scripting linting bash cli tooling web-researched

ESLint

The standard JavaScript/TypeScript linter. Covers flat config (v9), legacy .eslintrc, running, rules, plugins, TypeScript integration, VS Code, and pre-commit hooks.
javascript eslint linting tooling

ruff — Fast Linter & Formatter

Lint and format Python code with ruff — a single Rust-powered tool that replaces flake8, isort, and black. Covers configuration, rule selection, and CI usage.
python ruff linting formatting code-quality tools