How to install the default language servers

To show the list of default language servers for your version of Helix please use hx --health.

For Helix to use these language servers they must first be installed onto your computer. Once installed they will be used automatically with no further setup needed.

Check if your operating system repository has them available, or install them manually following the instructions below.

If your language server does not support stdio, you can use netcat as a drop-in proxy, just add this to your languages.toml:

[language-server.example]
command = "nc" 
args = ["127.0.0.1", "6008"]

[[language]]
name = "example"
language-servers = [ "example" ]

Much of this information was originally sourced from nvim-lspconfig, thanks to those authors!

Ansible

npm i -g @ansible/ansible-language-server

ansible-lint is a welcome addition, install it (via system package or other means) for a better experience.

Astro

https://github.com/withastro/language-tools/tree/main/packages/language-server

npm i -g @astrojs/language-server

Sample settings in languages.toml

[language-server.astro-ls]
command = "astro-ls"
args = ["--stdio"]
config = {typescript = {tsdk = "/Users/user/.bun/install/global/node_modules/typescript/lib"}, environment = "node"}

[[language]]
name = "astro"
auto-format = true
language-servers = [ "astro-ls" ]

Please note that a valid config.typescript.tsdk path must be passed to the LSP config. You will need typescript installed. If you have typescript installed globally you can find where by running npm list -g | head -1.

AWK

https://github.com/Beaglefoot/awk-language-server

npm i -g "awk-language-server@>=0.5.2"

Bash

Language server for Bash, written using tree-sitter in TypeScript.

https://github.com/mads-hartmann/bash-language-server

bash-language-server can be installed via NPM:

npm i -g bash-language-server

Bass

https://github.com/vito/bass/releases/latest

Bass's language server is built in to the bass command as bass --lsp. See the Guide for more info.

Bicep

https://github.com/Azure/bicep/releases/latest

The Bicep language server is published separately as a Windows package. Download the bicep-langserver.zip from the releases page.

To run this under Linux/WSL you will need to install the dotnet runtime for your OS.

Unzip this in a directory of your choosing for example /home/myUser/.cache/. Create the following bash script somewhere in your $PATH:

/usr/local/bin/bicep-langserver

#!/usr/bin/env bash

exec dotnet /home/myUser/.cache/bicep-langserver/Bicep.LangServer.dll

BQN

bqnlsp: https://git.sr.ht/~detegr/bqnlsp, which depends on:

cbqn-sys and cbqn-rs

Sample settings in languages.toml

[language-server.bqnlsp]
command = "bqnlsp"

[[language]]
name = "bqn"
file-types = ["bqn"]
comment-token = "#"
indent = { tab-width = 2, unit = "  " }
shebangs = ["bqn", "cbqn"]
roots = []
injection-regex = "bqn"
scope = "scope.bqn"
language-servers = ["bqnlsp"]
language-id = "bqn"

Note: you can input the glyphs by key remapping in config.toml like:

[keys.insert."\\"]
"=" = [ ":insert-output /bin/echo -n ×", "move_char_right" ]
minus = [ ":insert-output /bin/echo -n ÷", "move_char_right" ]
"+" = [ ":insert-output /bin/echo -n ⋆", "move_char_right" ]
# ...

C/C++

https://clangd.llvm.org/installation.html

NOTE: Clang >= 9 is recommended!

clangd relies on a JSON compilation database specified as compile_commands.json or, for simpler projects, a compile_flags.txt. For details on how to automatically generate one using CMake look here. Alternatively, you can use Bear.

Clojure

Please go to the installation page. https://clojure-lsp.io/installation/

An example for MacOs/Linux (copied from the installation page)

brew remove clojure-lsp # if you have old clojure-lsp installed via brew
brew install clojure-lsp/brew/clojure-lsp-native

Crystal

Core languages.toml contains configuration options, view at the top level of this repo.
Install the unofficial LSP server Crystalline. Below is copied from the LSP repo.

Linux (x86_64)

wget https://github.com/elbywan/crystalline/releases/latest/download/crystalline_x86_64-unknown-linux-musl.gz -O crystalline.gz &&\
gzip -d crystalline.gz &&\
chmod u+x crystalline

ArchLinux

yay -S crystalline

MacOS

Install using homebrew:

brew install crystalline

CSS

https://github.com/hrsh7th/vscode-langservers-extracted

css-languageserver can be installed via npm:

npm i -g vscode-langservers-extracted

C#

https://github.com/omnisharp/omnisharp-roslyn OmniSharp server based on Roslyn workspaces

omnisharp-roslyn can be installed by downloading and extracting a release for your platform from here. Omnisharp can also be built from source by following the instructions here.

Omnisharp requires the dotnet-sdk to be installed.

Usage

Linux and Windows

To use Omnisharp, you only need to have the OmniSharp binary in your environment path. The default languages.toml configuration should work fine.

macOS

Download the -netX.0 build. Because OmniSharp is not shipped as a binary file, instead as OmniSharp.dll, it needs to be run using dotnet. As such the languages.toml config should be changed to this:

[language-server.omnisharp]
command = "dotnet"
args = [ "path/to/OmniSharp.dll", "--languageserver" ]

If the language server immediately exits or otherwise doesn't appear to work, try running dotnet restore and/or dotnet build in the current project directory.

CMake

CMake LSP Implementation.

https://github.com/regen100/cmake-language-server

D

Serve-D.

https://github.com/Pure-D/serve-d

Install using dub fetch serve-d

Dart

Language server for dart.

https://github.com/dart-lang/sdk/tree/master/pkg/analysis_server/tool/lsp_spec

Deno

Install Deno from https://deno.land/#installation

Deno requires custom configuration in languages.toml see https://github.com/denoland/deno/issues/14455

[[language]]
name = "typescript"
shebangs = ["deno"]
roots = ["deno.json", "deno.jsonc"]
file-types = ["js", "ts", "jsx", "tsx"]
language-servers = ["deno-lsp"]
auto-format = true

[language-server.deno-lsp]
command = "deno"
args = ["lsp"]
environment = { NO_COLOR = "1" }

[language-server.deno-lsp.config.deno]
enable = true
# Uncomment to enable completion of unstable features of Deno
# unstable = true
# Uncomment to cache dependencies on save
# cacheOnSave = true
# Enable completion of importing from registries
# Enable completion of function calls
suggest = { completeFunctionCalls = false, imports = { hosts = { "https://deno.land" = true } } }
# suggest = { imports = { hosts = { "https://deno.land" = true, "https://crux.land" = true, "https://x.nest.land" = true } } }
# Uncomment to enable inlay hints
# inlayHints.parameterNames.enabled = "all"
# inlayHints.parameterTypes.enabled = true
# inlayHints.variableTypes.enabled = true
# inlayHints.propertyDeclarationTypes.enabled  = true
# inlayHints.functionLikeReturnTypes.enabled = true
# inlayHints.enumMemberValues.enabled = true

Note that some lsp commands are not currently supported, in particular go_to_definition because it requires a Deno lsp extension https://deno.land/manual/language_server/overview.

Docker

https://github.com/rcjsuen/dockerfile-language-server-nodejs

docker-langserver can be installed via npm:

npm install -g dockerfile-language-server-nodejs

dot Graphviz

https://github.com/nikeee/dot-language-server

npm i -g dot-language-server

Elixir

https://github.com/elixir-lsp/elixir-ls

elixir-ls can be installed by following the instructions here.

curl -fLO https://github.com/elixir-lsp/elixir-ls/releases/latest/download/elixir-ls.zip
unzip elixir-ls.zip -d /path/to/elixir-ls
# Unix
chmod +x /path/to/elixir-ls/language_server.sh

You also need to rename language_server.sh to elixir-ls and add it to your $PATH, because that's how helix expects to find it.

Elm

https://github.com/elm-tooling/elm-language-server#installation

npm install -g elm elm-test elm-format @elm-tooling/elm-language-server

Forth

https://github.com/alexanderbrevig/forth-lsp#install

cargo install forth-lsp

FSharp/F#

https://github.com/fsharp/FsAutoComplete

dotnet tool install --global fsautocomplete

GraphQL

https://github.com/graphql/graphiql/blob/main/packages/graphql-language-service-cli/

npm i -g graphql-language-service-cli

Unison

Unison language server.

More info: https://github.com/unisonweb/unison/blob/trunk/docs/language-server.markdown

Requirements:

ucm started
ncat, nc or netcat

To ~/.config/helix/languages.toml append this code:

[language-server.ucm]
command = "ncat"
args = ["localhost", "5757"]

[[language]]
name = "unison"
language-servers = [ "ucm" ]

GDScript

We need to install nc or netcat. Port 6005 is used in Godot 4.0 beta6. You will find the right value in the editor configuration panel.

[language-server.godot]
command = "nc" 
args = [ "127.0.0.1", "6005"]

[[language]]
name = "gdscript"
language-servers = [ "godot" ]

For Windows 10/11

Use winget to install nmap. This will install ncat.

winget install nmap

Once installed, make sure the folder that nmap is now located at is added to your PATH, as winget fails to do this automatically for some people.

In Godot 3.5.1 port used is 6008. You have to change the command used also. Instead of nc type ncat and modify the port. You can find the port when you open the Godot editor and navigate here: Editor -> Editor Settings -> Network -> Language Server -> Remote Port.

[language-server.godot]
command = "ncat" 
args = [ "127.0.0.1", "6008"]

[[language]]
name = "gdscript"
language-servers = [ "godot" ]

Gleam

Starting with version 0.21.0, the Gleam language server is built-in to the gleam command-line interface. See the official announcement for more information.

gleam lsp

Go

The folder for go packages (typically $HOME/go/bin) will need to be added to your PATH for any of the below to work.

Install tools

go install golang.org/x/tools/gopls@latest          # LSP
go install github.com/go-delve/delve/cmd/dlv@latest # Debugger
go install golang.org/x/tools/cmd/goimports@latest  # Formatter

Autoformatting

The LSP formatter (gofmt) does not fix imports, goimports should be used instead.

languages.toml

[[languages]]
name = "go"
auto-format = true
formatter = { command = "goimports" }

HTML

https://github.com/hrsh7th/vscode-langservers-extracted

vscode-html-language-server can be installed via npm:

npm i -g vscode-langservers-extracted

Haskell

Haskell Language Server.

https://github.com/haskell/haskell-language-server

PHP

Phpactor

https://phpactor.readthedocs.io/en/master/index.html

Phpactor requires PHP 8.1.

You can download phpactor.phar as follows:

curl -Lo phpactor.phar https://github.com/phpactor/phpactor/releases/latest/download/phpactor.phar

Then make it executable and symlink it somewhere in your PATH:

chmod a+x phpactor.phar
mv phpactor.phar ~/.local/bin/phpactor

Check support using the status command:

phpactor status
✔ Composer detected - faster class location and more features!
✔ Git detected - enables faster refactorings in your repository scope!

Then, to enable this LSP you have to create a file languages.toml in your project directory .helix/languages.toml and place the following code inside (or if you want you could do this to helix languages.toml file globally):

[language-server.phpactor]
command = "phpactor"
args = [ "language-server" ]
[[language]]
name = "php"
language-servers = [ "phpactor" ]

Intelephense

Warning

Intelephense is proprietary, so be sure to review its licensing terms.

https://intelephense.com

intelephense can be installed via npm:

npm install -g intelephense

JavaScript

See tsserver.

JSON

https://github.com/hrsh7th/vscode-langservers-extracted

vscode-json-language-server, a language server for JSON and JSON schema

vscode-json-language-server can be installed via npm:

npm i -g vscode-langservers-extracted

Available settings can be found here: https://github.com/microsoft/vscode/blob/4f69cdf95a12cef48d405b38bf7812a7f297c310/extensions/json-language-features/server/src/jsonServer.ts#L183

Usage

config = { "provideFormatter" = true, "json" = { "keepLines" = { "enable" = true } } }

Jsonnet

https://github.com/grafana/jsonnet-language-server

A Language Server Protocol (LSP) server for Jsonnet.

Can be installed either via the latest release binary or if you have golang installed, you can use:

go install github.com/grafana/jsonnet-language-server@latest

Java

https://github.com/eclipse/eclipse.jdt.ls

Installation instructions can be found on the projects README.

On macOS installation can also be done via brew install jdtls.

On debian based distros try a fantastic install script made by eruizc-dev: jdtls-launcher.

For the Arch Linux: yay -Sy jdtls AUR jdtls source.

After installing, test to see if the jdtls works out of the box (it should work for the debian script). For versions older than 1.16.0: the -data parameter must be passed to jdtls and it must be different for each project. This can be achieved by adding a .helix/languages.toml configuration to the project root:

[language-server]
jdtls = { command = "jdtls" }
language-server = { command = "jdtls", args = [
  "-data", "/home/<USER>/.cache/jdtls/workspace"
  ]}

[[language]]
name = "java"
scope = "source.java"
injection-regex = "java"
file-types = ["java"]
roots = ["pom.xml", "build.gradle", ]
indent = { tab-width = 4, unit = "    " }
language-servers = [ "jdtls" ]

Note: the -data parameter must be up one directory from the project directory.

Julia

https://github.com/julia-vscode/LanguageServer.jl

LanguageServer.jl can be installed with julia and Pkg:

julia -e 'using Pkg; Pkg.add("LanguageServer")'

To update an existing install, use the following command:

julia -e 'using Pkg; Pkg.update()'

Kotlin

A Kotlin language server which was developed for internal usage and released afterward. Maintaining is not done by the original author, but by fwcd.

It is built via gradle and developed on GitHub. Source and additional description: https://github.com/fwcd/kotlin-language-server

LaTex

TexLab: A cross-platform implementation of the Language Server Protocol providing rich cross-editing support for the LaTeX typesetting system.

Add the following to your languages.toml to enable build on save:

[language-server.texlab.config.texlab.build]
onSave = true

TexLab can be further configured to jump to your current location in the pdf following the build, among other useful things. For all available options, see the TexLab wiki. Everything under the texlab key goes under language-server.texlab.config.texlab (or possibly language.config.texlab on older releases). For instance, setting the texlab.build.onSave property to true (as per the TexLab wiki) is achieved with the above languages.toml.

Lean 3

https://github.com/leanprover/lean-client-js/tree/master/lean-language-server

Lean installation instructions can be found here.

Once Lean is installed, you can install the Lean 3 language server by running

npm install -g lean-language-server

Lua

Binaries are available from: https://github.com/LuaLS/lua-language-server/releases

mac

brew install lua-language-server

Markdown

Marksman

The default language server is Marksman: https://github.com/artempyanykh/marksman

Binaries are available from: https://github.com/artempyanykh/marksman/releases

macOS and Linux

brew install marksman or yay -S marksman-bin

Windows

scoop install marksman

ltex-ls

As an alternative you can use ltex-ls which provides grammar and spelling errors in markup documents: https://valentjn.github.io/ltex/ltex-ls/installation.html

[[language]]
name = "markdown"
language-servers = [ "marksman", "ltex-ls" ]

Additional configuration settings can be added, for example to disable the profanity rules and add the word builtin to two dictionaries:

[language-server.ltex-ls.config]
ltex.disabledRules = { "en-US" = ["PROFANITY"], "en-GB" = ["PROFANITY"] }
ltex.dictionary = { "en-US" = ["builtin"], "en-GB" = ["builtin"] }

Currently, the ability to add to your user dictionary while running Helix is not supported, so adding words to the config is the best workaround.

`markdown-oxide`

An alternative to marksman that provides support for advanced markdown PKM systems in your favorite text editor. It features complete compatibility with Obsidian.md markdown syntax and bases its features on the features of the Obsidian.md editor. For a list of all features, check out the README

It can be installed for Arch from the AUR under the name markdown-oxide-git

paru -S markdown-oxide-git

Or it can be installed by cargo

cargo install --git https://github.com/Feel-ix-343/markdown-oxide.git markdown-oxide

Or manually by following these directions

If #9758 is merged, the above steps should be all that is required. However, until then update your helix config with the following after installing the language server:

[language-servers]
markdown-oxide = { command = "markdown-oxide" }

# ...

[[language]]
name = "markdown"
language-servers = [ "markdown-oxide" ] # or [ "markdown-oxide", "ltex-ls", ...]; just make sure to remove marksman so markdown-oxide functions properly

Scala

Scala language server with rich IDE features.

https://scalameta.org/metals/

Install Coursier
Run coursier install metals

Sql

https://github.com/joe-re/sql-language-server

npm i -g sql-language-server

languages.toml setting

[language-server.sql-language-server]
command = "sql-language-server"
args = ["up", "--method", "stdio"]

[[language]]
name = "sql"
language-servers = [ "sql-language-server" ]

Markdoc

markdoc-ls - an experimental language server for markdoc.

Install using

npm install -g markdoc-ls

MATLAB

matlab-language-server

Note: as per the README, "MATLAB language server requires MATLAB version R2021a or later."

[language-server.matlab-ls]
command = "matlab-language-server"
args = ["--stdio"]

[language-server.matlab-ls.config.MATLAB]
indexWorkspace = false
installPath = "/PATH/TO/MATLAB/INSTALLATION"
matlabConnectionTiming = "onStart"
telemetry = false

[[language]]
name = "matlab"
scope = "source.m"
file-types = ["m"]
language-servers = ["matlab-ls"]
comment-token = "%"
shebangs = ["octave-cli", "matlab"]
indent = { tab-width = 2, unit = "  " }

Mint

https://www.mint-lang.com

Install Mint using the instructions. The language server is included since version 0.12.0.

Mojo

https://www.modular.com/mojo

Install the Modular CLI
Install the Mojo SDK

See this PR: https://github.com/helix-editor/helix/pull/8583

Nim

https://github.com/nim-lang/langserver

# May require choosenim
nimble install nimlangserver

Nix

The default language server is nil since the 2022-12 release.

https://github.com/oxalica/nil

This program is available in NixOS/nixpkgs under attribute nil, and is regularly updated.

If you use nix-env, run nix-env -iA nixpkgs.nil
If you use nix profile, run nix profile install nixpkgs#nil
Check out the GitHub repository for additional options

The formatter nixpkgs-fmt is not included and can be installed with nix-env -iA nixpkgs.nixpkgs-fmt

To set up the formatter, set the following in your languages.toml :

[[language]]
name = "nix"
formatter = { command = "nixpkgs-fmt" }

To use the previous default language server, check out https://github.com/nix-community/rnix-lsp

OCaml

https://github.com/ocaml/ocaml-lsp

The OCaml language server ocamllsp can be installed via OPAM:

opam install ocaml-lsp-server

Perl

https://github.com/bscan/PerlNavigator

Provides syntax checking, autocompletion, perlcritic, code navigation, hover for Perl.

Implemented as a Language Server using the Microsoft LSP libraries along with Perl doing the syntax checking and parsing.

Perl Navigator can be installed by downloading the latest release for your platform at the project's releases page and putting the perlnavigator executable somewhere in your PATH.

PowerShell

Syntax highlighting is not currently possible as there is no PowerShell treesitter. But auto-completion can be achieved by the following configuration. Download the latest PowerShellEditorServices zip and extract it. In this example, I extracted it to C:\projects\powershell.

[[language]]
name = "powershell"
scope = "source.ps1"
file-types = ["ps1", "psm1"]
roots = [".git"]
comment-token = "#"
indent = { tab-width = 4, unit = "    " }
language-servers = [ "powershell-editor-services" ]

[language-server.powershell-editor-services]
command = "pwsh"
args = ["-NoLogo", "-NoProfile", "-Command", "C:\\projects\\powershell\\PowerShellEditorServices\\PowerShellEditorServices\\Start-EditorServices.ps1 -BundledModulesPath C:\\projects\\
powershell\\PowerShellEditorServices -SessionDetailsPath C:\\projects\\powershell\\PowerShellEditorServices\\PowerShellEditorServices.sessions.json -LogPath C:\\projects\\powershell\\
PowerShellEditorServices\\PowerShellEditorServices.log -FeatureFlags @() -AdditionalModules @() -HostName helix -HostProfileId 0 -HostVersion 1.0.0 -Stdio -LogLevel Normal"]

Prisma

https://github.com/prisma/language-tools/tree/main/packages/language-server

prisma-language-server can be installed via npm:

npm install -g @prisma/language-server

Python - pylsp

python-lsp/python-lsp-server (pylsp) is a fork of the python-language-server project (pyls), maintained by the Spyder IDE team and the community. It is a Python 3.7+ implementation of the Language Server Protocol (versions <1.4 should still work with Python 3.6).

Installation instructions can be found in the project's README, but it consists of installing a package using pip (or pipx):

pip install -U 'python-lsp-server[all]'

The [all] above refers to the optional providers supported. You can fine-tune what to install following the instructions here.

python-lsp-ruff

python-lsp/python-lsp-ruff is a plugin for pylsp that provides support for ruff (see below). See installation instructions.

The plugin supports some configuration, but it should work out of the box after installing.

Python - pyright

Pyright is a fast type checker and language server from Microsoft, meant for large Python source bases. It is the LSP part of pylance (the VS Code python daemon).

https://github.com/microsoft/pyright

The language server can be installed by running npm install --location=global pyright

languages.toml

[[language]]
name = "python"
language-servers = [ "pyright" ]

Python - ruff

charliermarsh/ruff is an extremely fast Python linter, written in Rust (see installation instructions).

An LSP for it is available through charliermarsh/ruff-lsp (see installation instructions).

A suggested Helix configuration using ruff-lsp is given below (based on charliermarsh/ruff-lsp#example-helix):

[language-server.ruff-lsp]
command = "ruff-lsp"
[[language]]
name = "python"
language-servers = [ "ruff-lsp" ]

# In case you'd like to use ruff alongside black for code formatting:
formatter = { command = "black", args = ["--quiet", "-"] }
auto-format = true

Note that ruff lacks basic features and is meant to be used alongside another LSP (helix-editor/helix#5399 (comment), charliermarsh/ruff-lsp#23, charliermarsh/ruff-lsp#23 (comment)).

As an alternative, pylsp has support for ruff via a plugin. See instructions for Helix here

Python - pyright + ruff + black

pyright - npm install pyright -g

ruff - pip install ruff-lsp

black - pip install black

[[language]]
name = "python"
language-servers = [ "pyright", "ruff" ]

[language-server.pyright.config.python.analysis]
typeCheckingMode = "basic"

[language-server.ruff]
command = "ruff-lsp"

[language-server.ruff.config.settings]
args = ["--ignore", "E501"]

[language.formatter]
command = "black"
args = ["--line-length", "88", "--quiet", "-"]

OpenPolicyAgent

An implementation of the language server protocol for OpenPolicyAgent's rego.

You can download it from its releases page, or

$ go install github.com/kitagry/regols@latest

Prolog

An implementation of the language server protocol for SWI-Prolog

https://github.com/jamesnvc/lsp_server

Install the swi-prolog package and run swipl:

?- pack_install(lsp_server).

R

An implementation of the Language Server Protocol for R.

https://github.com/REditorSupport/languageserver

The language server can be installed by running R -e 'install.packages("languageserver")'.

Racket

https://github.com/jeapostrophe/racket-langserver

The Racket language server. This project seeks to use DrRacket's public API to provide functionality that mimics DrRacket's code tools as closely as possible.

Install via raco: raco pkg install racket-langserver

ReScript

https://github.com/rescript-lang/rescript-vscode

// ReScript language server.

Rust

rust-analyzer (aka rls 2.0), a language server for Rust.

https://github.com/rust-analyzer/rust-analyzer

You can install rust-analyzer using rustup starting from Rust 1.64, and it will be added to your system's $PATH starting from Rustup 1.26.0:

rustup component add rust-analyzer

Add the following to your languages.toml to enable clippy on save:

[language-server.rust-analyzer.config.check]
command = "clippy"

See docs for extra settings. Everything under the rust-analyzer key goes under language-server.rust-analyzer.config key in helix (for example, rust-analyzer.check.command = "clippy" is translated into the language.toml as above.)

SCSS

SCSS's language server is available from the vscode-langservers-extracted collection:

https://github.com/hrsh7th/vscode-langservers-extracted

You may install it by running:

npm i -g vscode-langservers-extracted

Slint

https://github.com/slint-ui/slint/tree/HEAD/tools/lsp
https://slint-ui.com/

cargo install slint-lsp

Smithy

For Smithy projects the following LSP is used: https://github.com/awslabs/smithy-language-server

coursier must be installed so that the language server can be launched. To install coursier please see their installation instructions. Since coursier will take care of everything else, no other steps are necessary!

Swift

A language server for Swift, formatting provided via swift-format

https://github.com/apple/sourcekit-lsp

https://github.com/apple/swift-format

Follow the Getting Started guide to get sourcekit-lsp installed correctly for your OS. No additional configuration is needed, though note to use the same toolchain for both your installed LSP, and that you use to build.

Solargraph

https://solargraph.org/

Solargraph, a language server for Ruby

You can install Solargraph via gem install.

gem install --user-install solargraph

solc

solc is the native language server for the Solidity language.

https://docs.soliditylang.org/en/latest/installing-solidity.html

Svelte

https://github.com/sveltejs/language-tools/tree/master/packages/language-server

svelte-language-server can be installed via npm:

npm i -g svelte-language-server

For integration with .js and .ts files install typescript-svelte-plugin via npm:

npm i -g typescript-svelte-plugin

Then for each svelte project update your tsconfig.json/jsconfig.json to add the typescript-svelte-plugin

{
    "compilerOptions": {
        ...
        "plugins": [{
            "name": "typescript-svelte-plugin"
        }]
    }
}

Further information on js and ts integration for svelte can be found here.

TailwindCSS

https://github.com/tailwindlabs/tailwindcss-intellisense

tailwindcss-language-server can be installed via npm:

npm i -g @tailwindcss/language-server

Add this to your local languages.toml file to enable it

languages.toml:

[[language]]
name = "html"
language-servers = [ "vscode-html-language-server", "tailwindcss-ls" ]

[[language]]
name = "css"
language-servers = [ "vscode-css-language-server", "tailwindcss-ls" ]

[[language]]
name = "jsx"
language-servers = [ "typescript-language-server", "tailwindcss-ls" ]

[[language]]
name = "tsx"
language-servers = [ "typescript-language-server", "tailwindcss-ls" ]

[[language]]
name = "svelte"
language-servers = [ "svelteserver", "tailwindcss-ls" ]

If you want to use TailwindCSS language server with other languages, configure like example below. The example is with rust.

[[language]]
name = "rust"
language-servers = ["rust-analyzer", "tailwindcss-ls"]

[language-server.tailwindcss-ls]
config = { userLanguages = { rust = "html", "*.rs" = "html" } }

Terraform

You'll need terraform-ls installed; the instructions are here.

TOML

https://taplo.tamasfe.dev/

The NPM versions of taplo does not contain the language server at this time The full version (with the language server) can be downloaded from:

binaries: taplo releases

or installed with:

cargo:

cargo install taplo-cli --locked --features lsp

languages.toml:

[[language]]
name = "toml"
formatter = { command = "taplo", args = ["fmt", "-"] }

Run taplo lsp --help for more info.

TypeScript

typescript-language-server

https://github.com/typescript-language-server/typescript-language-server

typescript-language-server depends on typescript. Both packages can be installed via npm:

npm install -g typescript typescript-language-server

To configure type language server, add a tsconfig.json or jsconfig.json to the root of your project.

Here's an example that disables type checking in JavaScript files.

{
  "compilerOptions": {
    "module": "commonjs",
    "target": "es6",
    "checkJs": false
  },
  "exclude": ["node_modules"]
}

Biome

Biome is a fast and efficient toolchain for web development that formats and lints code, supporting JavaScript, TypeScript, JSX, and JSON, with over 190 rules and high compatibility with existing tools like Prettier.

npm install --save-dev --save-exact @biomejs/biome

Follow the official instructions on how to configure Biome for Helix.

Typst

https://github.com/uben0/tree-sitter-typst/

cargo install --git https://github.com/nvarner/typst-lsp typst-lsp

Uiua

language: https://www.uiua.org
lsp: https://github.com/uiua-lang/uiua?tab=readme-ov-file#language-server
tree-sitter: https://github.com/shnarazk/tree-sitter-uiua

[language-server.uiua-lsp]
command = "uiua"
args = ["lsp"]

[[language]]
name = "uiua"
scope = "source.uiua"
injection-regex = "uiua"
file-types = ["ua"]
roots = []
auto-format = true
comment-token = "#"
language-servers = [ "uiua-lsp" ]
indent = { tab-width = 2, unit = "  " }
shebangs = ["uiua"]
auto-pairs = {'(' = ')', '{' = '}', '[' = ']', '"' = '"'}

WGSL

https://github.com/wgsl-analyzer/wgsl-analyzer

wgsl_analyzer can be installed via cargo:

cargo install --git https://github.com/wgsl-analyzer/wgsl-analyzer wgsl_analyzer

V

https://github.com/vlang/v-analyzer

install and build:

git clone https://github.com/vlang/v-analyzer
cd v-analyzer
v build.vsh release

config path:

set the v-analyzer to environment variable:

PATH=your/path/v-analyzer/bin:$PATH

Vue

https://github.com/vuejs/language-tools/tree/master/packages/language-server

The Vue language server vue-language-server can be installed via npm:

npm i -g @vue/language-server

To autoformat your .vue files upon save, you can first install prettier via npm:

npm i -g prettier

And then add this to your languages.toml file in your Helix configuration directory:

[[language]]
name = "vue"
auto-format = true
formatter = { command = "prettier", args = ["--parser", "vue"] }

To make TypeScript recognize imports of .vue files, install typescript-vue-plugin and add the following to tsconfig.json:

{
  "compilerOptions": {
    "plugins": [
       {
         "name": "typescript-vue-plugin"
       }
    ]
  } 
}

YAML

https://github.com/redhat-developer/yaml-language-server

yaml-language-server can be installed via brew on Mac:

brew install yaml-language-server

or via npm:

npm i -g yaml-language-server@next

Example configuration using json schemas.

[language-server.yaml-language-server.config.yaml]
format = { enable = true }
validation = true

[language-server.yaml-language-server.config.yaml.schemas]
"https://json.schemastore.org/github-workflow.json" = ".github/workflows/*.{yml,yaml}"
"https://raw.githubusercontent.com/ansible-community/schemas/main/f/ansible-tasks.json" = "roles/{tasks,handlers}/*.{yml,yaml}"

Zig

Zig LSP implementation + Zig Language Server.

https://github.com/zigtools/zls

Uh oh!

How to install the default language servers

Ansible

Astro

AWK

Bash

Bass

Bicep

BQN

C/C++

Clojure

Crystal

Linux (x86_64)

ArchLinux

MacOS

CSS

C#

Usage

Linux and Windows

macOS

CMake

D

Dart

Deno

Docker

dot Graphviz

Elixir

Elm

Forth

FSharp/F#

GraphQL

Unison

GDScript

Gleam

Go

Install tools

Autoformatting

HTML

Haskell

PHP

Phpactor

Intelephense

JavaScript

JSON

Jsonnet

Java

Julia

Kotlin

LaTex

Lean 3

Lua

Markdown

Marksman

ltex-ls

markdown-oxide

Scala

Sql

Markdoc

MATLAB

Mint

Mojo

Nim

Nix

OCaml

Perl

PowerShell

Prisma

Python - pylsp

python-lsp-ruff

Python - pyright

Python - ruff

Python - pyright + ruff + black

OpenPolicyAgent

Prolog

R

Racket

ReScript

Rust

SCSS

Slint

`markdown-oxide`