{"version":"2.1.285","anchor":"zod-validation-mac-and-credit-card-string-formats-map-unit","canonical_anchor":"zod-validation-mac-and-credit-card-string-formats-map-unit","heading":"Bundled validation library can check MAC addresses and credit card numbers","tier":"internal","area":"Schemas","url":"https:\/\/changelogs.core-directive.com\/v\/2.1.285\/e\/zod-validation-mac-and-credit-card-string-formats-map-unit","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.285","markdown":"### Bundled validation library can check MAC addresses and credit card numbers\n\nThe library Claude Code uses to check data formats now recognises MAC addresses and credit card numbers\n\n**What**\n\nThe library Claude Code bundles for checking that data has the right shape can now recognise two more text formats: MAC addresses (the hardware address of a network device) and credit card numbers. Its error messages in other languages gained matching labels, and it gained wording for the size of map-style data.\n\n**Why**\n\nThis comes with a library update and has little direct effect on how you use Claude Code.\n\n- Area: Schemas\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 0\/5"}