joshuakgoldberg/cspell

CSpell is a spell checker designed specifically for code and technical documentation. Unlike regular spell checkers that get confused by programming syntax, variable names, and technical jargon, it scans your source files and flags genuine spelling errors while ignoring things like function names, URLs, and code snippets. At a high level, it works by parsing your source files, extracting the text-like content, and checking it against bundled dictionaries. It is available as a command-line tool you can run manually or wire into your automated workflows, and it also integrates with popular code editors like VS Code through a related extension. There is even an ESLint plugin, which means it can enforce spelling as part of your normal code quality checks alongside other rules. You can configure which files to check, add custom words to the dictionary, and tune it to your project's needs. This tool is useful for any team that wants to keep their codebase and documentation professional. A startup founder preparing an open-source project for public release might use it to catch typos in their README before investors or contributors see them. A product manager might appreciate that error messages and user-facing documentation stay clean. Developers benefit because misspelled variable names or comments can cause confusion, and catching those early saves time. The project is built as a monorepo, meaning it is split into multiple smaller packages that each handle a specific piece of functionality, one for the command-line app, one for the library core, one for dictionary tools, and so on. This modular design lets other tools build on top of it. The README does not go into deep detail about configuration or setup beyond linking to separate documentation, but it is clearly an actively maintained project with a community of contributors and a history of steady releases.