LSP Server

crystalline

Crystalline language server for Crystal — diagnostics, go-to-definition, find references, hover information, and navigation for .cr 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": {
    "crystalline": {
      "command": "${CLAUDE_PLUGIN_ROOT}/scripts/lsp-entrypoint.sh",
      "extensionToLanguage": {
        ".cr": "crystal"
      }
    }
  }
}

Supported Languages

File extensions mapped to language identifiers

crystal

.cr

Details

Server configuration and transport parameters

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

Transportstdio

Advanced Configuration

Initialization options and workspace settings

Startup Timeout:60000ms

Restart on Crash:Yes

Max Restarts:3

Stats

LanguageTypeScript

Parent stars152

Parent forks16

MaintenanceGood

Last CommitFeb 17, 2026

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