Bulk Password Update

Apply or rotate passwords across multiple NFC tags from a CSV file. The skill presents each tag, verifies the UID matches the CSV row, authenticates with the old password, applies the new password, and tracks progress in a resumable sidecar file.

When to use

• You have 10+ tags that need password rotation or initial password protection.
• CSV source lists tag UIDs with corresponding old and new passwords.
• You want resumable progress tracking if the batch is interrupted.

Inputs to gather

• CSV file path — full path to the CSV (e.g., ~/Documents/nfc-batches/passwords-2026-04.csv). If not provided, prompt user; store the selected path in ${CLAUDE_USER_DATA:-${XDG_DATA_HOME:-$HOME/.local/share}/claude-plugins}/nfc-ops/config.json for future runs.
• CSV columns required: uid, old_password, new_password.
• Optional: label column (human name for the tag, for UI clarity).

Procedure