Trim Emacs config to a lean editor; fix cold-start failures

.config/zsh/aliases.zsh

@@ -7,8 +7,10 @@ alias mkdir="mkdir -p"
 # fd is installed as fdfind on Ubuntu/Debian
 command -v fdfind > /dev/null && alias fd=fdfind
 
-# Emacs client with proper socket
-alias e="emacsclient -a 'emacs' --socket-name $EMACS_SOCKET_NAME"
+# Emacs client. No --socket-name: emacsclient derives the same default socket
+# path that server-start writes, so hardcoding it only creates a way for the
+# two to disagree (they did, on macOS).
+alias e="emacsclient -a 'emacs'"
 
 # Deno web server
 alias serve="deno run --allow-read --allow-net jsr:@std/http/file-server"

.config/zsh/tools.zsh

@@ -78,19 +78,11 @@ if [[ -z "$XDG_RUNTIME_DIR" ]]; then
   fi
 fi
 
-# Configure Emacs socket name based on platform
-# These paths must match Emacs's default server-socket-dir behavior
-# Emacs checks XDG_RUNTIME_DIR first (on any platform), then falls back
-if [[ -n "$XDG_RUNTIME_DIR" ]]; then
-  EMACS_SOCKET_NAME="${XDG_RUNTIME_DIR}/emacs/server"
-elif [[ "$CURRENT_OS" = "Darwin" ]]; then
-  # Darwin fallback: $TMPDIR/emacs (no UID)
-  EMACS_SOCKET_NAME="${TMPDIR%/}/emacs/server"
-else
-  # Linux fallback without XDG_RUNTIME_DIR: /tmp/emacs<uid>
-  EMACS_SOCKET_NAME="/tmp/emacs$(id -u)/server"
-fi
-export EMACS_SOCKET_NAME
+# No EMACS_SOCKET_NAME here on purpose. This block used to re-derive Emacs's
+# default server-socket-dir, and got it wrong on macOS: Emacs 30 uses
+# $TMPDIR/user/<uid>/emacs, not $TMPDIR/emacs, so every `e' missed the running
+# server and cold-started a new Emacs instead. emacsclient computes the same
+# default the server does, so the right fix is to not pass --socket-name.
 
 # Set up Java environment
 export JAVA_OPTIONS="-Djava.awt.headless=true"

.emacs.d/early-init.el

@@ -0,0 +1,36 @@
+;;; early-init.el --- Runs before package.el and the first frame -*- lexical-binding: t; -*-
+
+;; Emacs 27+ loads this before package initialization and before the initial
+;; frame is created.  Anything that changes frame geometry belongs here, so
+;; the frame gets drawn once at its final size instead of flickering.
+
+;; Effectively disable GC for the duration of startup.  init.el restores a
+;; sane working threshold on `emacs-startup-hook'.
+(setq gc-cons-threshold most-positive-fixnum
+      gc-cons-percentage 0.6)
+
+;; init.el drives package activation itself so it can guarantee that
+;; dependencies are on the load-path before anything macro-expands against
+;; them.  Without this, a first run on a machine with an empty elpa/ fails
+;; while activating packages that expand against compat.
+(setq package-enable-at-startup nil)
+
+;; Frame chrome.  Setting these as frame parameters avoids drawing the bars
+;; and then removing them.
+(push '(tool-bar-lines . 0) default-frame-alist)
+(push '(menu-bar-lines . 0) default-frame-alist)
+(push '(vertical-scroll-bars) default-frame-alist)
+
+;; Don't re-lay-out the frame every time the font or modeline changes size.
+(setq frame-inhibit-implied-resize t)
+
+;; Native compilation warnings come almost entirely from third-party
+;; packages, where there is nothing useful to do about them.
+(setq native-comp-async-report-warnings-errors 'silent)
+
+;; Skip the regexp scan of `file-name-handler-alist' for every file loaded
+;; during startup.  init.el puts it back.
+(defvar tl/file-name-handler-alist file-name-handler-alist)
+(setq file-name-handler-alist nil)
+
+;;; early-init.el ends here