A shell hack for restoring basic up/down arrow functionality with atuin while still using its database instead of vanilla shell history until it's implemented natively: https://github.com/ellie/atuin/issues/798

atuin.zsh

export ATUIN_ARROW_INDEX=-1

upArrow() {
  export ATUIN_ARROW_INDEX=$(( ATUIN_ARROW_INDEX + 1))

  COMMAND=$(atuin search --limit 1 --offset $ATUIN_ARROW_INDEX | cut -f2)
  LBUFFER="$COMMAND"

  return
}

downArrow() {
  export ATUIN_ARROW_INDEX=$(( ATUIN_ARROW_INDEX - 1))

  if [ $ATUIN_ARROW_INDEX -lt 0 ]; then
    export ATUIN_ARROW_INDEX=-1
    LBUFFER=""
    return
  fi

  COMMAND=$(atuin search --limit 1 --offset $ATUIN_ARROW_INDEX | cut -f2)
  LBUFFER="$COMMAND"

  return
}

returnKey() {
  export ATUIN_ARROW_INDEX=-1
  zle accept-line
}

zle -N upArrow
zle -N downArrow
zle -N returnKey

bindkey '\eOA' upArrow
bindkey '\eOB' downArrow
bindkey '^M' returnKey

# TODO: The below ctrl+c intfercepting doesn't work in ZSH for some reason

ctrlC() { 
  echo "ctrl c"
  export ATUIN_ARROW_INDEX=-1
}

zle -N ctrlC

bindkey '^C' ctrlC
trap "ctrlC" INT TERM