v3.2.0

Minor Changes

• #116 56bc2cf Thanks @lawvs! - Add comparison support for Zod 4.3 and 4.4 schema updates.

  Zod 4.3 support covers schema variants including z.xor(), z.looseRecord(), and .exactOptional(). Zod 4.4 support treats empty z.union([]) and z.xor([]) schemas, including nested empty unions, as never for TypeScript-level same-type and compatibility checks. It also keeps z.undefined() object properties required and clarifies runtime-only comparison warnings while leaving strict runtime behavior to custom rules.

Patch Changes

• c9d3c0b Thanks @lawvs! - Fix TypeScript 6 declaration output so published packages include dist/index.d.ts instead of only dist/src/index.d.ts.

v3.1.0

Minor Changes

• #114 6cc59d3 Thanks @lawvs! - Update isCompatibleType to use the (expectedType, providedType) assignability model and improve TypeScript-like compatibility checks for optional and nullable wrappers, unions, finite literal and enum values, arrays, tuples, objects, records, maps, and sets.

  Document that Zod 4 brands are type-only and compare like their underlying runtime schema.

v3.0.0

Major Changes

• #100 7801de3 Thanks @copilot-swe-agent! - Drop Zod v3 support. Zod v4 is now the sole supported version.

  Breaking Changes

  • Peer dependency: Changed from zod: ^3.25.0 || ^4.0.0 to zod: ^4.0.0. Zod v3 is no longer supported.
  • Removed sub-exports: zod-compare/zod3 and zod-compare/zod4 entry points have been removed. Use the main zod-compare entry point instead.
  • Removed version utilities: isZod3Schema, isZod4Schema, and haveSameZodMajor are no longer exported.
  • Simplified API surface: isSameType and isCompatibleType now only accept Zod v4 schemas. Mixed-version comparison (which previously threw) is no longer possible.

  Migration

  - import { isSameType } from "zod-compare/zod4";
  + import { isSameType } from "zod-compare";

v2.0.1

Patch Changes

• 2ca3be7 Thanks @lawvs! - Update dependencies

v2.0.0

Major Changes

• #84 3e0bbf0 Thanks @lawvs! - Add first-class compatibility with Zod v4.

  • New entry point: zod-compare/zod4 exposes the same comparison APIs for Zod v4
  • Peer dependency widened to zod: ^3.25.0 || ^4.0.0
  • No breaking changes for Zod v3 users

  Notes:

  • Mixed-major comparisons are not supported at runtime. When Zod majors differ, both isSameType and isCompatibleType throw an error.

  Usage:

  // Zod v4
  import { z } from "zod/v4";
  import { isSameType, isCompatibleType } from "zod-compare/zod4";
  
  // Zod v3
  import { z as z3 } from "zod";
  import {
    isSameType as isSameV3,
    isCompatibleType as isCompatV3,
  } from "zod-compare/zod3";

v1.1.0

Minor Changes

• c3ff484 Thanks @lawvs! - Upgrade dependencies

v1.0.0

Major Changes

• a49c6a3 Thanks @lawvs! - Release 1.0

v0.3.1

Patch Changes

• 95175c4: feat: add compare result to debug stack

v0.3.0

Minor Changes

• b40d479: refactor: redesign isCompatibleType with new rule style

  The function createIsSameTypeFn has been renamed to createCompareFn.

v0.2.0

Minor Changes

• ff25a46: refactor!: replace misc options with middleware

  BREAKING CHANGE: The options object has been removed and replaced with custom rules.