# Install lspmux with Homebrew, apk, Nix Share one language instance between multiple LSP clients to save resources. Version 0.3.0 via Homebrew; verified 2026-07-15. Also installable with nix: nix profile install nixpkgs#lspmux. ## Install ```sh sudo av install brew:lspmux ``` Additional install commands: ### macOS - Homebrew (100%): ```sh brew install lspmux ``` Evidence: local Homebrew formula metadata ### Linux - apk (92%): ```sh sudo apk add lspmux ``` Evidence: Alpine Linux edge package indexes: lspmux from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz - Nix (92%): ```sh nix profile install nixpkgs#lspmux ``` Evidence: nixpkgs package indexes: pkgs/by-name/ls/lspmux/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 ## Package facts - **Package key:** brew:lspmux - **Package manager:** Homebrew - **Package manager page:** - **Version:** 0.3.0 - **Source summary:** Share one language instance between multiple LSP clients to save resources - **Homepage:** - **Repository:** - **Upstream docs:** - **License:** EUPL-1.2 - **Source archive:** - **Last updated:** 2026-07-15T08:34:20Z - **Generated:** 2026-07-26T07:20:29+00:00 ## Executables - lspmux (cli) - lspmux (alias) ## Dependencies - rust-analyzer ## Build dependencies - rust ## Install behavior - Post-install hook: not defined - Service: declared - Bottle: available on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux ## Freshness - Page generated: 2026-07-26 - Package-manager version: 0.3.0 - Package-manager updated: 2026-07-15 - Local data: ok - Upstream repository: https://codeberg.org/p2502/lspmux - info: Release/tag comparison is only available for GitHub repositories. ## Project history and usage lspmux is a Language Server Protocol multiplexer that lets multiple editor clients share one language-server instance per workspace. Its README describes it as a proxy and client shim that multiplexes editor connections onto the appropriate language server to save resources. ### Project history The project started as ra-multiplex, focused on rust-analyzer. Its changelog shows early releases in January and February 2022 adding configuration, removing a nightly Rust requirement, improving client/server behavior, and adding initial support for language servers other than rust-analyzer. In 2024, the project added status and reload commands, native LSP initialize-message handshakes, Unix socket support, and environment filtering. In October 2025, it migrated to Codeberg, changed license to EUPL-1.2, and was renamed from ra-multiplex to lspmux to reflect its broader language-server scope. ### Adoption history lspmux is a niche developer tool aimed at users who run multiple editor windows or clients against the same workspace. The README points users to Cargo installation and package-manager availability through Repology, while the supplied package facts list Homebrew, Alpine, and Nix. ### How it is used The usual setup is to run `lspmux server` as a user service and configure an editor to use `lspmux` as the language-server executable or connect directly to the lspmux socket. The README gives examples for rust-analyzer, CoC in Neovim, clangd, systemd user services on Linux, and launchd services on macOS. Configuration is optional and stored in a TOML file in the system default configuration directory, with `~/.config/lspmux/config.toml` given as the Unix example. The README documents defaults for instance timeout, garbage-collection interval, TCP or Unix-socket listen/connect addresses, logging filters, and environment-variable filtering. ### Why package nerds care lspmux matters to package nerds because it is a resource-control tool for the LSP era. Rather than replacing an editor or a language server, it sits in the middle and makes repeated editor sessions cheaper, especially for heavy servers such as rust-analyzer. ### Timeline - 2022: ra-multiplex 0.1.x releases add configuration and early support for non-rust-analyzer servers. - 2024: 0.2.x releases add status/reload commands, Unix sockets, native LSP handshake changes, and environment filtering. - 2025: Repository migrates to Codeberg and license changes to EUPL-1.2. - 2025: Project is renamed from ra-multiplex to lspmux in v0.3.0. ### Related projects - Related projects include rust-analyzer, clangd, Neovim LSP clients, CoC, and the Language Server Protocol itself. ### Sources - - - - source_facts.package-manager ## Security Notes broad file, network, media, or database tool signal. formula declares a Homebrew service. - **Geiger risk:** orange / medium - broad file, network, media, or database tool signal - formula declares a Homebrew service ## Configuration and credential file locations These source-backed paths show where this package keeps local settings or durable credentials. Automic Vault can use them as review targets for secret scanning, migration, and command approval. ## Configuration files - Unix: ~/.config/lspmux/config.toml ## Source Database Details - **Source Database:** Homebrew formula API - **Tap:** homebrew/core - **Full Name:** lspmux - **Version Scheme:** 0 - **Revision:** 0 - **Head Version:** HEAD - **Bottle Stable Root URL:** - **Deprecated:** no - **Disabled:** no - **Keg Only:** no - **URL Keys:** head, stable ## Other Package-Manager Records - Nix - lspmux: normalized package name match | nixpkgs package indexes: pkgs/by-name/ls/lspmux/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - apk - lspmux - 0.3.0-r0: normalized package name match | Alpine Linux edge package indexes: lspmux from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz | Share one instance of an LSP between multiple clients | https://codeberg.org/p2502/lspmux - apk - lspmux-doc - 0.3.0-r0: normalized package name match | Alpine Linux edge package indexes: lspmux-doc from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz | Share one instance of an LSP between multiple clients (documentation) | https://codeberg.org/p2502/lspmux ## Related links - [Secret-risk packages](https://www.automicvault.com/pkg/secret-risk-packages/) - Has protected-tool coverage, approval-gate, or non-low Geiger security signals. - [Terminal utility packages](https://www.automicvault.com/pkg/terminal-utilities/) - Matched terminal and command-line workflow metadata. - [Text processing packages](https://www.automicvault.com/pkg/text-processing-tools/) - Matched text, document, or structured-data processing metadata. - [Developer build packages](https://www.automicvault.com/pkg/developer-build-tools/) - Matched build, compiler, generator, or developer workflow metadata. - [rust-analyzer](https://www.automicvault.com/pkg/brew/rust-analyzer/) - Runtime dependency declared by Homebrew. - [rust](https://www.automicvault.com/pkg/brew/rust/) - Build dependency declared by Homebrew. - [actions-languageserver](https://www.automicvault.com/pkg/brew/actions-languageserver/) - Shares av.db curated category or tags: cli, developer-tools, language-server, lsp. - [ansible-language-server](https://www.automicvault.com/pkg/brew/ansible-language-server/) - Shares av.db curated category or tags: cli, developer-tools, language-server, lsp. - [expert](https://www.automicvault.com/pkg/brew/expert/) - Shares av.db curated category or tags: cli, developer-tools, language-server, lsp. - [gopls](https://www.automicvault.com/pkg/brew/gopls/) - Shares av.db curated category or tags: cli, developer-tools, language-server, lsp. - [jq-lsp](https://www.automicvault.com/pkg/brew/jq-lsp/) - Shares av.db curated category or tags: cli, developer-tools, language-server, lsp. - [postgres-language-server](https://www.automicvault.com/pkg/brew/postgres-language-server/) - Shares av.db curated category or tags: cli, developer-tools, language-server, lsp. - [python-lsp-server](https://www.automicvault.com/pkg/brew/python-lsp-server/) - Shares av.db curated category or tags: cli, developer-tools, language-server, lsp. - [ruby-lsp](https://www.automicvault.com/pkg/brew/ruby-lsp/) - Shares av.db curated category or tags: cli, developer-tools, language-server, lsp. - [git-pages](https://www.automicvault.com/pkg/brew/git-pages/) - Local metadata places this package in an adjacent workflow. Shared terms: cli, developer, developer-tools, server. - [git-pages-cli](https://www.automicvault.com/pkg/brew/git-pages-cli/) - Local metadata places this package in an adjacent workflow. Shared terms: cli, developer, developer-tools, server. ## Combined YAML source View the package source record on GitHub. [combined/lspmux.yml](https://github.com/automic-vault/db/blob/main/combined/lspmux.yml) ## Sources - Nucleus package database - Geiger risk classifier - package-page enrichment - curated configuration and credential file locations - curated package history - package version freshness - av.db category and tag curation - package relationship graph - external package-manager database matches - cross-ecosystem install command graph