Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[0.2.0] - Unreleased

halogen-image: Image-to-theme color extraction using histogram bucketing and HCT k-means clustering
halogen-image: resolveImage() engine extensions for URL-based and raw-pixel theme resolution
halogen-image: extractColors() for standalone palette extraction without theme resolution
halogen-image: Coil 3 integration with platform-specific pixel extraction (Bitmap on Android, Skia on JVM/iOS/wasmJs)
halogen-image: Algorithmic (toSpec()) and LLM-enhanced (toHint()) theme generation paths

halogen-core: HalogenThemeSpec, HalogenLlmProvider interface, HalogenColorScheme with 49 M3 color roles
halogen-core: Pure Kotlin HCT color science (CAM16, tonal palettes, WCAG contrast validation)
halogen-core: HalogenTypography (15 M3 text styles) and HalogenShapes (5 M3 shape sizes)
halogen-engine: HalogenEngine with in-memory LRU cache, single provider model
halogen-cache-room: Optional Room KMP persistent cache (Android, iOS, JVM)
halogen-engine: Halogen.Builder for configuration with .provider() and .remoteThemes()
halogen-engine: Prompt construction with system prompt, few-shot examples, and extension injection
halogen-compose: HalogenTheme composable wrapping MaterialTheme
halogen-compose: HalogenSettingsCard drop-in settings UI component
halogen-compose: LocalHalogenExtensions composition local
halogen-provider-nano: GeminiNanoProvider for on-device inference via ML Kit
Custom extensions system for developer-defined theme tokens
Keyed theme cache with eviction, refresh, and observability APIs
One LLM call generates both light and dark color schemes
KMP support: Android, iOS (arm64, simulatorArm64), Desktop (JVM), Web (WasmJs)