Changelog:

• 0.6.0
  • Added completion suggestion strategy powered by completion system
  • Allow setting ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE to an empty string
  • Don't fetch suggestions after copy-earlier-word
  • Allow users to unignore zle-* widgets
• 0.6.1
  • Fixed bug occurring when _complete had been aliased
• 0.6.2
  • Fixed bug deleting the last character in the buffer in vi mode
  • Degrade gracefully when user doesn't have zsh/system module installed
• 0.6.3
  • Fixed bug moving cursor to end of buffer after accepting suggestion

1. Ensure source /usr/share/zsh-autosuggestions/zsh-autosuggestions.zsh exists in .zshrc.
2. Run Zsh.
3. Suggestions should appear based on history.