{"version":"2.1.300","anchor":"zod-upgrade-schemas-frozen-and-lazily-built","canonical_anchor":"zod-upgrade-schemas-frozen-and-lazily-built","heading":"Updated built-in data validation library","tier":"internal","area":"Dependencies","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.300\/e\/zod-upgrade-schemas-frozen-and-lazily-built","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.300","markdown":"### Updated built-in data validation library\n\nClaude Code's bundled validation library has been updated, with little visible effect\n\n**What**\n\nClaude Code includes a library called zod, which checks that data has the expected shape. The bundled version has been updated: it locks its parts against changes, builds some checks only when they are first needed, and handles more kinds of keys in lookup tables.\n\n**Why**\n\nThis is a library update with little effect on how you use Claude Code.\n\n- Area: Dependencies\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 0\/5\n- Scope: individual\n- Heads-up: no"}