changelog

name	changelog
description	Update CHANGELOG.md with recent changes following Keep a Changelog format

Changelog

Context

Current changelog state:

!cat CHANGELOG.md

Recent changes to document:

!jj log --limit 10 -T 'description ++ "\n---\n"'

Task

Update CHANGELOG.md following Keep a Changelog format.

Format Rules

1. Add entries under ## [Unreleased] section

2. Group changes by type:

   • ### Added - new features
   • ### Changed - changes to existing functionality
   • ### Deprecated - features to be removed
   • ### Removed - removed features
   • ### Fixed - bug fixes
   • ### Security - vulnerability fixes

3. Each entry should:

   • Start with a verb (Add, Change, Fix, Remove, etc.)
   • Be concise but descriptive
   • Reference ADRs when relevant: (See ADR-NNNN)
   • Group related items logically

Style

• Write in imperative mood ("Add X" not "Added X")
• Focus on user-facing changes, not implementation details
• Combine related commits into single entries when appropriate
• Order entries by importance within each section

Example Entry

### Added

- Add `Xyz` and `Lms` color spaces as foundation for color representation
- Add chromatic adaptation transforms: Bradford, CAT02, CAT16, Von Kries, and others (See ADR-0002)
- Add `illuminant` module with CIE standard illuminants (D65 always available, others feature-gated)