Add support for Python(ty) (#4785)

* feat(clients): add LSP support for Python(ty) language

Introduce a new client for the Python(ty) programming language in `lsp-mode`.
This includes the ability to start the `ty` language server and provides integration with `python-mode`.

* feat(python): add support for Python(ty) language server

Added configuration and documentation for the Python(ty) language server, including links to its repository and installation instructions.
Updated the changelog and navigation in the documentation to reflect the new support.

* feat(lsp): add support for lsp-python-ty

Author: takeokunn

CHANGELOG.org

@@ -38,6 +38,7 @@
   * Add ~lsp-nix-nixd-server-arguments~ to allow passing arguments to the ~nixd~ LSP.
   * Improve the lsp-ocaml client (see [[https://github.com/emacs-lsp/lsp-mode/issues/4731][#4731]] for the follow-up issue. MRs: [[https://github.com/emacs-lsp/lsp-mode/pull/4741][#4741]], [[https://github.com/emacs-lsp/lsp-mode/pull/4732][#4732]])
   * Add support for ~source.removeUnusedImports~ for lsp-javascript
+  * Add Python(ty) support
 
 ** 9.0.0
   * Add language server config for QML (Qt Modeling Language) using qmlls.

clients/lsp-python-ty.el

@@ -0,0 +1,49 @@
+;;; lsp-python-ty.el --- description -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2025 emacs-lsp maintainers
+
+;; Author: emacs-lsp maintainers
+;; Keywords: lsp, python
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; LSP Clients for the Python(ty) Programming Language.
+
+;;; Code:
+
+(require 'lsp-mode)
+
+(defgroup lsp-python-ty nil
+  "LSP support for Python(ty)."
+  :group 'lsp-mode
+  :link '(url-link "https://github.com/astral-sh/ty"))
+
+(defcustom lsp-python-ty-clients-server-command '("ty" "server")
+  "Command to start the python-ty language server."
+  :group 'lsp-python-ty
+  :risky t
+  :type '(repeat string))
+
+(lsp-register-client
+ (make-lsp-client :new-connection (lsp-stdio-connection lsp-python-ty-clients-server-command)
+                  :major-modes '(python-mode)
+                  :server-id 'lsp-python-ty))
+
+
+(lsp-consistency-check lsp-python-ty)
+
+(provide 'lsp-python-ty)
+;;; lsp-python-ty.el ends here

docs/lsp-clients.json

@@ -940,6 +940,16 @@
     "installation-url": "https://github.com/emacs-lsp/lsp-python-ms",
     "debugger": "Yes"
   },
+  {
+    "name": "python-ty",
+    "full-name": "Python (ty)",
+    "server-name": "LSP support for Python(ty).",
+    "server-url": "https://github.com/astral-sh/ty",
+    "client-name": "lsp-python-ty",
+    "client-url": "https://github.com/astral-sh/ty",
+    "installation-url": "https://github.com/astral-sh/ty",
+    "debugger": "Yes"
+  },
   {
     "name": "qml-ls",
     "full-name": "QML (Qt Modeling Language)",

lsp-mode.el

@@ -186,7 +186,7 @@ As defined by the Language Server Protocol 3.16."
      lsp-matlab lsp-mdx lsp-meson lsp-metals lsp-mint lsp-mojo lsp-move lsp-mssql
      lsp-nextflow lsp-nginx lsp-nim lsp-nix lsp-nushell lsp-ocaml lsp-openscad
      lsp-pascal lsp-perl lsp-perlnavigator lsp-php lsp-pls lsp-postgres
-     lsp-purescript lsp-pwsh lsp-pyls lsp-pylsp lsp-pyright lsp-python-ms
+     lsp-purescript lsp-pwsh lsp-pyls lsp-pylsp lsp-pyright lsp-python-ms lsp-python-ty
      lsp-qml lsp-r lsp-racket lsp-remark lsp-rf lsp-roc lsp-roslyn lsp-rubocop
      lsp-ruby-lsp lsp-ruby-syntax-tree lsp-ruff lsp-rust lsp-semgrep lsp-shader
      lsp-solargraph lsp-solidity lsp-sonarlint lsp-sorbet lsp-sourcekit

mkdocs.yml

@@ -150,6 +150,7 @@ nav:
     - Python (Pyright): https://emacs-lsp.github.io/lsp-pyright
     - Python (Microsoft): https://emacs-lsp.github.io/lsp-python-ms
     - Python (Ruff): page/lsp-ruff.md
+    - Python (ty): https://github.com/astral-sh/ty
     - QML: page/lsp-qml.md
     - R: page/lsp-r.md
     - Racket (jeapostrophe): page/lsp-racket-langserver.md