Changelog

v0.5.0 (2026-04-23)

Embed the Draft 2020-12 built-in meta-schema family directly in code and cache compiled built-in defs for $ref and $dynamicRef resolution
Refactor built-in Draft 2020-12 support into draft-specific modules: JSONSchex.Draft202012.Schemas, JSONSchex.Draft202012.Vocabulary, and JSONSchex.Draft202012.Dialect
Simplify and de-duplicate reference resolution logic, including URI fragment handling and loaded-schema validation flow
Fix built-in meta-schema validation so schemas can be validated against the canonical Draft 2020-12 meta-schema without an external loader
Update official test suite, and adapt to pass the official Draft 2020-12 optional format cases for duration, time, and uri:
- Tighten duration format validation to match the RFC 3339 Appendix A grammar used by the official Draft 2020-12 optional format suite
- Accept RFC 3339 time values with unknown local offset (-00:00)
- Tighten uri and uri-reference format validation to reject invalid percent-encoding triplets

Fixed an issue where $ref could cause an infinite loop during validation
Refactor compile-time and validation-time failures to use the unified JSONSchex.Types.Error model with structured ErrorContext
Improve error formatting so invalid keyword and compile errors produce clearer, more contextual messages
Treat the canonical Draft 2020-12 meta-schema as a built-in dialect without requiring a loader, while still honoring explicit $vocabulary declarations
Split vocabulary handling between supported vocabularies and the built-in Draft 2020-12 default active vocabulary set
Optimize local $ref compilation by batching JSON Pointer resolution for explicit local fragment references
Improve scope scanning so $id, anchors, and explicit local fragment refs are registered more consistently
Consolidate time format validation into the date-time format implementation