TypeScript LSP Plugin: Code Intelligence in Claude Code
typescript-lsp is Anthropic's plugin that connects Claude Code to typescript-language-server for definitions, references and error checking in TS and JS files.
By Claudekit Team Published 1 min read
- Type
- Plugin
- Pricing
- Open Source
- Repository
- github.com
- Website
- github.com
typescript-lsp is an Anthropic plugin that connects Claude Code to the TypeScript language server. With it, Claude gets go-to-definition, find references and error checking for TypeScript and JavaScript files instead of relying on text search alone.
Checked 24 Oct 2026 against the plugin’s README and its marketplace.json entry (version 1.0.0).
Who it is for
Anyone using Claude Code on a TypeScript or JavaScript codebase, especially large ones where text search misses renamed or re-exported symbols.
Install
First install the language server:
npm install -g typescript-language-server typescriptThen the plugin:
/plugin install typescript-lsp@claude-plugins-officialWhat it does
- Registers
typescript-language-server --stdioas an LSP server in Claude Code. - Maps
.ts,.mtsand.ctsto TypeScript,.tsxto TypeScript React,.js,.mjsand.cjsto JavaScript, and.jsxto JavaScript React. - Gives Claude real diagnostics and symbol navigation while it edits.
Pros
- Small plugin with no extra configuration beyond the server.
- Real type errors instead of guesses.
- Sibling plugins cover many other languages in the same marketplace.
Cons and caveats
- You must install and keep the language server on your PATH yourself.
- Covers TS and JS only; other languages need their own LSP plugin.
Links
- Plugin folder: plugins/typescript-lsp
- Server: typescript-language-server on npm
- Related: Serena, Claude Plugins Official, plugins guide
Frequently asked questions
Do I need to install anything else?
Yes. Install the language server globally first: npm install -g typescript-language-server typescript, or the yarn global equivalent.
Which file types are covered?
.ts, .tsx, .js, .jsx, .mts, .cts, .mjs and .cjs.
Are there LSP plugins for other languages?
Yes. The same marketplace lists pyright-lsp, gopls-lsp, rust-analyzer-lsp, clangd-lsp, jdtls-lsp, kotlin-lsp, csharp-lsp, php-lsp, ruby-lsp, swift-lsp and lua-lsp.