LSP Server

ruby-lsp

Ruby LSP provides code intelligence for Ruby and ERB — diagnostics, go-to-definition, find references, hover info, symbols for .rb, .ru, .erb, .rake, .gemspec files.

Ruby

backend

Requires Language Server Binary

This LSP server requires ruby-lspto be installed on your system. Make sure it's available in your PATH before enabling.

Add to Your Project

Copy this JSON into your .lsp.json to enable this server

Add to your .lsp.json or plugin.json:

{
  "lspServers": {
    "ruby-lsp": {
      "command": "ruby-lsp",
      "extensionToLanguage": {
        ".rb": "ruby",
        ".ru": "ruby",
        ".erb": "erb",
        ".rake": "ruby",
        ".gemspec": "ruby"
      }
    }
  }
}

Supported Languages

File extensions mapped to language identifiers

ruby

.rb.ru.rake.gemspec

erb

.erb

Details

Server configuration and transport parameters

Commandruby-lsp

Transportstdio

Advanced Configuration

Initialization options and workspace settings

Restart on Crash:Yes

Stats

LanguagePython

Parent stars2

MaintenanceGood

Last CommitFeb 24, 2026

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