package spectrum_capabilities

Changelog

1.0.0.alpha

Major enhancements!

• automatic color quantization: RGB and HSL colors are now automatically downsampled to ANSI-256 or ANSI-16 based on detected terminal capabilities
• perceptual color matching: use LAB color space with octree-based nearest-neighbor search for accurate color quantization
• unified converter architecture: removed legacy Chalk and ImprovedChalk converters in favor of the Perceptual converter
• custom palette support: architecture now supports arbitrary palettes via JSON sources
• package split: spectrum (main runtime), spectrum_palette (palette definitions), spectrum_palette_ppx (palette codegen PPX), spectrum_tools (color conversion utilities), and spectrum_palettes (generated palette modules)
• palette JSON definitions live in lib/spectrum_palette/*.json, with PPX-generated modules in lib/spectrum_palettes/terminal.ml
• Spectrum.Stag module: type-safe variant-based API for Format.stag, allowing pre-validated tag construction with zero parsing overhead as an alternative to string tags
• spectrum_capabilities package: terminal capability detection extracted into a standalone opam package (zero dependency on the rest of Spectrum)
• property-based tests: QCheck2 property tests for parser, lexer, color conversions, capabilities detection, and stag/string-tag equivalence
• comprehensive test coverage: all modules now tested
• odoc documentation: comprehensive API docs with examples

0.7.0

• minimum OCaml version raised to 4.14
• replace pcre dependency with re (pure OCaml)

0.6.0

• finally understood what the interface should be 😅
• expose main interface via the parent Spectrum module (instead of Spectrum.Printer as it used to be)
• main interface is now Spectrum.prepare_ppf, allowing Spectrum tag handling with the usual Format.printf methods, with the usual buffering behaviour in user's control
• "instant gratification" interface (previously our main interface) is now Spectrum.Simple.printf and friends, having the always-flush buffer behaviour
• changed the colour names in Basic range to match the list at https://www.ditig.com/256-colors-cheat-sheet
• make % char optional in HSL colours, to avoid ugly escaping

0.5.0

• support CSS-style rgb(...) and hsl(...) color tags

0.4.0

• port the terminal colour capabilities detection from chalk.js

0.3.0

• expose separate Exn and Noexn interfaces
• fix for buffer interaction issue (tests broke when updating dep Fmt.0.9.0) ...probably affected most uses of sprintf_into
• replace sprintf_into kludge with a working sprintf implementation

0.2.0

• first viable version