[Fix #1454] Drop stale tide references from docs

prelude-ts moved from tide to typescript-ts-mode + LSP, but the TS
module docs and the prelude-format-on-save docstring still described
tide. Rewrite docs/modules/ts.md for the current setup (point to the
prelude-apheleia module for format-on-save) and update the docstring.

Author: bbatsov

CHANGELOG.md

@@ -28,6 +28,7 @@
 - Use `ocaml-eglot-mode` instead of the obsolete `ocaml-eglot` alias (renamed in `ocaml-eglot` 1.4.0).
 - Add a temporary `eglot-server-programs` entry for `neocaml` so older `neocaml` versions still get `ocamllsp` started. Can be removed once `neocaml >= 20260331` is widely available on MELPA.
 - Drop `M-g e` and `M-g f` from `prelude-vertico`'s consult bindings so they no longer shadow the avy bindings (`avy-goto-word-0`, `avy-goto-line`) set in core. Bind `consult-compile-error` / `consult-flymake` in your personal config if you want them.
+- [#1454](https://github.com/bbatsov/prelude/issues/1454): Drop stale `tide` references from the docs now that `prelude-ts` uses `typescript-ts-mode` + LSP.
 
 ## 2.1.0 (2026-03-29)
 

core/prelude-custom.el

@@ -102,7 +102,7 @@ in the desired elisp file."
 
 (defcustom prelude-format-on-save t
   "Run mode specific format on file before it's saved.
-Currently only applies to tide-mode."
+Currently only applies to TypeScript files."
   :type 'boolean
   :group 'prelude)
 

docs/modules/ts.md

@@ -6,41 +6,41 @@
 
 ## Packages
 
-- [typescript-mode](https://github.com/emacs-typescript/typescript.el) -
-  major mode for TypeScript
-- [tide](https://github.com/ananthakumaran/tide) - TypeScript
-  Interactive Development Environment
+This module relies on Emacs' built-in tree-sitter support and LSP, so it
+doesn't pull in any third-party packages:
+
+- `typescript-ts-mode` / `tsx-ts-mode` - tree-sitter powered major modes
+  for TypeScript and TSX (built into Emacs 29+)
 
 ## Features
 
-Tide provides a rich development experience for TypeScript:
+Code intelligence is provided by an LSP server (Eglot by default):
 
 - Code completion (via company-mode)
-- Syntax checking (via Flycheck)
+- Syntax checking (via Flymake or Flycheck)
 - Eldoc integration for inline type information
-- Identifier highlighting (`tide-hl-identifier-mode`)
-- Format on save (when `prelude-format-on-save` is enabled)
+- Navigation, refactoring, and documentation lookup
 
 ## Prerequisites
 
-You need [Node.js](https://nodejs.org/) and `tsserver` (bundled with TypeScript)
-installed. Install TypeScript globally:
+The tree-sitter modes need the TypeScript grammars installed. You can grab
+them with:
 
-```sh
-npm install -g typescript
+```emacs-lisp
+(treesit-install-language-grammar 'typescript)
+(treesit-install-language-grammar 'tsx)
 ```
 
-## Configuration
-
-### Format on Save
+For code intelligence you need [Node.js](https://nodejs.org/) and a language
+server. The default is
+[typescript-language-server](https://github.com/typescript-language-server/typescript-language-server):
 
-By default, Tide formats the buffer before saving when `prelude-format-on-save`
-is enabled. You can customize the format action:
+```sh
+npm install -g typescript typescript-language-server
+```
 
-```emacs-lisp
-;; Disable format on save for TypeScript
-(setq prelude-format-on-save nil)
+## Format on Save
 
-;; Or use a different formatter
-(setq prelude-ts-format-action #'my-custom-format-function)
-```
+For automatic formatting on save, enable the
+[Apheleia](apheleia.md) module. It runs `prettier` (or another configured
+formatter) asynchronously whenever you save a TypeScript buffer.