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Changelog

v0.3.2 (2025-12-07)

Fixed

  • CRITICAL: Fixed UUIDv7 sortability by implementing monotonic counter
  • UUIDv7 now uses 12-bit sequence counter for same-millisecond UUIDs
  • Ensures strict lexicographic ordering even when generating thousands of UUIDs per millisecond
  • Handles clock rollback gracefully
  • Thread-safe implementation with mutex protection

Changed

  • Enhanced UUIDv7 test coverage with 10,000 UUID generation test
  • Improved TestV7Sortability to verify strict monotonic ordering
  • Updated TestV7Monotonicity to test 10,000 UUIDs instead of 1,000
  • Added detailed logging to sortability tests

Technical Details

  • Implements RFC 9562 Section 6.2 recommendations for monotonic counters
  • 48-bit millisecond timestamp + 12-bit sequence + 62-bit random data
  • Sequence counter randomly initialized per millisecond
  • Automatic sequence increment for same-millisecond UUIDs
  • Handles sequence overflow by waiting for next millisecond

v0.3.1 (2025-12-07)

Added

  • Comprehensive Makefile for automated build process
  • Makefile targets: all, help, tidy, lint, build, test, bench, fuzz, coverage, clean, install-tools, ci
  • Color-coded output for better readability
  • Automatic dependency handling between targets
  • Coverage report generation (HTML format)
  • Development tools installation script
  • Detailed Makefile usage documentation in README.md

Changed

  • Enhanced README.md with complete Makefile documentation
  • Added development workflow section
  • Improved contributor onboarding with make targets

v0.3.0 (2025-12-06)

Added

  • UUID version 2 (DCE Security) implementation with POSIX UID/GID support
  • NewV2() function for custom domain and ID
  • NewV2Person() convenience function using current process UID
  • NewV2Group() convenience function using current process GID
  • Domain type with Person, Group, and Org constants
  • Domain() method to extract domain from UUID v2
  • ID() method to extract local identifier from UUID v2
  • Domain.String() method for human-readable domain names
  • Comprehensive UUID v2 test suite with 95%+ coverage
  • UUID v2 benchmarks (NewV2, NewV2Person, NewV2Group)
  • Fuzz tests for UUID v2 domain values and parsing
  • Enhanced documentation with UUID v2 usage examples

Changed

  • Updated to Go 1.25
  • Enhanced golangci-lint configuration
  • Improved test coverage across all UUID versions
  • Updated documentation to include DCE Security UUID examples

v0.2.0 (2025-12-04)

Added

  • UUID version 6 (reordered Gregorian time-based) implementation per RFC 9562
  • UUID version 7 (Unix Epoch time-based) implementation per RFC 9562
  • Comprehensive test suite with sortability, monotonicity, and concurrency tests
  • Benchmark tests for all UUID versions
  • Enhanced documentation with usage examples

Changed

  • Updated to Go 1.24
  • Migrated from tideland.dev/go/audit/asserts to tideland.dev/go/asserts/verify
  • Modernized test patterns following current Tideland Go standards
  • Updated copyright to 2021-2025
  • Improved documentation in README.md with comprehensive examples
  • Enhanced doc.go to reflect RFC 9562 compliance

Fixed

  • Package import path updated to modern standards
  • Test coverage improvements
  • Code style alignment with other Tideland Go packages

v0.1.1 (2021-08-31)

  • Renamed FromHex() to Parse() and improved it
  • Fix GitHub workflow

v0.1.0 (2021-08-28)

  • Migrated UUID code from former DSA Identifier package