Hi @JonW
Thanks very much for using Codebook and posting to the discussion forum with this question. We have looked into this in the past as we think it would be useful as well. Unfortunately there was no way that we could find to bulk export the keychain items (either programmatically or through the Keychain Access interface). When you select saved passwords within the Keychain Access interface, the File > Export Items menu item is disabled: Import and export keychain items using Keychain Access on Mac - Apple Support
That being said, if you’ve been saving your Passwords when prompted via Safari, then you should be able to export those passwords to a CSV and then manipulate the header according to the Codebook CSV import format: Codebook Help - Import
You can export your Passwords from Safari to CSV via File menu > Export > Export Passwords. Alternatively if you’re using macOS Ventura, you may have Passwords stored within Apple menu > System Settings > Passwords, click the 3 dots near the search field and then choose Export Passwords.
Let me know if this information is helpful and if you have any further questions. Thanks!