LSP Servers

altimate integrates with Language Server Protocol (LSP) servers for diagnostics, completions, and code intelligence.

Built-in Servers

Server	Languages	Auto-install	Root Detection
TypeScript	.ts, .tsx, .js, .jsx, .mjs, .cjs	Yes	package-lock.json, bun.lock, yarn.lock
Deno	.ts, .tsx, .js, .jsx, .mjs	Yes	deno.json, deno.jsonc
Vue	.vue	Yes	package-lock.json, bun.lock
ESLint	.ts, .tsx, .js, .jsx, .vue	Yes	package-lock.json, bun.lock
Oxlint	.ts, .js, .json, .css, .html, .vue	Yes	.oxlintrc.json, package.json
Biome	.ts, .js, .json, .vue, .css, .html	Yes	biome.json, biome.jsonc
Gopls	.go	Yes	go.mod, go.sum
Ruby-LSP	.rb, .rake, .gemspec	Yes	Gemfile
Pyright	.py, .pyi	Yes	pyproject.toml, setup.py
Ty	.py, .pyi	No (experimental)	pyproject.toml, setup.py
Elixir-LS	.ex, .exs	Yes	mix.exs
ZLS	.zig, .zon	Yes	build.zig
C#	.cs	Yes	.sln, .csproj
F#	.fs, .fsi, .fsx	Yes	.sln, .fsproj

Configuration

Disable All LSP

{
  "lsp": false
}

Disable a Specific Server

{
  "lsp": {
    "eslint": {
      "disabled": true
    }
  }
}

Custom Server

{
  "lsp": {
    "my-lsp": {
      "command": ["my-language-server", "--stdio"],
      "extensions": [".myext"],
      "env": {
        "MY_LSP_LOG": "debug"
      },
      "initialization": {
        "customSetting": true
      }
    }
  }
}

Field	Type	Description
command	string[]	Command to start the LSP server
extensions	string[]	File extensions (required for custom servers)
disabled	boolean	Disable this server
env	object	Environment variables
initialization	object	LSP initialization options

Auto-Install

LSP servers are automatically downloaded when needed. Disable with:

export ALTIMATE_CLI_DISABLE_LSP_DOWNLOAD=true

Experimental Servers

Enable experimental LSP servers:

export ALTIMATE_CLI_EXPERIMENTAL_LSP_TY=true    # Ty (Python)
export ALTIMATE_CLI_EXPERIMENTAL_LSP_TOOL=true   # LSP as tool