LSP Server

metals

Metals language server for Scala and sbt — diagnostics, go-to-definition, find references, hover information, symbols, and call hierarchy for .scala, .sc, .sbt files.

backend

Requires Language Server Binary

This LSP server requires ${CLAUDE_PLUGIN_ROOT}/scripts/lsp-entrypoint.shto 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": {
    "metals": {
      "command": "${CLAUDE_PLUGIN_ROOT}/scripts/lsp-entrypoint.sh",
      "extensionToLanguage": {
        ".sc": "scala",
        ".sbt": "sbt",
        ".scala": "scala"
      }
    }
  }
}

Supported Languages

File extensions mapped to language identifiers

scala

.sc.scala

sbt

.sbt

Details

Server configuration and transport parameters

Command${CLAUDE_PLUGIN_ROOT}/scripts/lsp-entrypoint.sh

Transportstdio

Advanced Configuration

Initialization options and workspace settings

Startup Timeout:120000ms

Restart on Crash:Yes

Max Restarts:3

Stats

LanguageTypeScript

Parent stars152

Parent forks16

MaintenanceGood

Last CommitFeb 17, 2026

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