zpty module is only needed for completion strategy

src/setup.zsh

@@ -1,10 +0,0 @@
-
-#--------------------------------------------------------------------#
-# Setup                                                              #
-#--------------------------------------------------------------------#
-
-# Precmd hooks for initializing the library and starting pty's
-autoload -Uz add-zsh-hook
-
-# Asynchronous suggestions are generated in a pty
-zmodload zsh/zpty

src/start.zsh

@@ -17,4 +17,5 @@ _zsh_autosuggest_start() {
 }
 
 # Start the autosuggestion widgets on the next precmd
+autoload -Uz add-zsh-hook
 add-zsh-hook precmd _zsh_autosuggest_start

src/strategies/completion.zsh

@@ -87,6 +87,8 @@ _zsh_autosuggest_capture_buffer() {
 }
 
 _zsh_autosuggest_capture_completion() {
+	zmodload -s zsh/zpty || return
+
 	typeset -g completion
 	local line REPLY