After merging two 1password vaults I ended up with a lot of duplicates. I wanted to only keep one version of each entry.

deduplicate_1password_items.sh

#!/bin/bash

# This script basically find duplicateds based on titles, keep the first one and delete the other ones.
# /!\ Be careful if you have different IDs that potentially have the same title.
# You need 1password client and jq to make it work

json_data=$(op item list --format json)
duplicates=$(echo "$json_data" | jq -r '.[] | .title' | sort | uniq -d)

while read -r title; do
  ids=$(echo "$json_data" | jq --arg title "$title" -r '.[] | select(.title == $title) | .id' | tr '\n' ' ')

  # Shift first id
  first_id=$(echo "$ids" | cut -d ' ' -f1)

  # Delete the other ones
  for item in $(echo "$ids" | cut -d ' ' -f2-); do
    echo "Deleting $item for $titre"
    op item delete $item
  done
done <<<"$duplicates"