LSP Configuration

ValidatorLSPOfficial docsLSP servers

The .lsp.json file maps server names to their configurations, enabling language intelligence for Claude Code.

Fields

Field	Type	Required	Description
command	string	yes	Command to start the server
extensionToLanguage	object	yes	Map of file extensions to language IDs
args	string[]	no	Command arguments
transport	string	no	stdio or socket
env	object	no	Environment variables
initializationOptions	object	no	LSP initialization options
settings	object	no	LSP server settings
workspaceFolder	string	no	Override workspace folder path
startupTimeout	number	no	Startup timeout (ms, min 0)
shutdownTimeout	number	no	Shutdown timeout (ms, min 0)
restartOnCrash	boolean	no	Auto-restart on crash (default: true)
maxRestarts	number	no	Max restart attempts (min 0)
requestTimeout	number	no	Positive integer request timeout in milliseconds; default 60000
diagnostics	boolean	no	Inject diagnostics after edits; default true

Example

{
  "typescript": {
    "command": "typescript-language-server",
    "args": ["--stdio"],
    "extensionToLanguage": {
      ".ts": "typescript",
      ".tsx": "typescriptreact"
    }
  }
}