@volar/language-core is the core component of the Volar language tooling for Vue.js. It provides the foundation for language features like autocompletion, diagnostics, and go-to-definition specifically tailored for Vue single-file components and TypeScript integration. This package offers programmatic access to parse, analyze, and manipulate Vue code, enabling custom language server extensions and IDE integrations that enhance the Vue development experience. It focuses on performance and accuracy in representing Vue's unique syntax and semantics.