feat(skills): add pixel-art skill (consolidated from #8930) - #12663
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…ased skill Merges pixel-art-arcade and pixel-art-snes into one pixel-art skill with named presets (arcade, snes) + parametric overrides. The underlying pipeline was already identical across both variants — only palette size, block size, and enhancement strength differed. A single preset-based function is easier to discover, maintain, and extend (adding a new era like gameboy or nes is just another preset dict). Contributor authorship preserved on original additive commit.
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Summary
Adds a built-in pixel-art skill that converts images into retro pixel art via named presets. Salvaged from #8930 (dodo-reach) — consolidated their two near-duplicate skills (pixel-art-arcade, pixel-art-snes) into a single preset-based skill and promoted it into built-in skills.
Changes
skills/creative/pixel-art/SKILL.md— new skill witharcadeandsnespresets + parametric overrides. Single Pillow pipeline (enhance → posterize → downscale NEAREST → quantize with Floyd-Steinberg → upscale NEAREST) dialed per preset.scripts/release.py— AUTHOR_MAP entry for dodo-reach (CI compliance).Why consolidate
The two originals were identical Pillow pipelines with only 5 numeric knobs different (contrast/color/posterize bits, block size, palette size). A preset-based single skill is easier to discover (one name for "retro pixel art"), maintain (one function signature), and extend (adding gameboy/nes is just another preset dict).
Why built-in instead of optional
Pillow is already ubiquitous, the skill is small, and retro pixel art is a common creative ask — fits alongside existing built-in creative skills.
Validation
Pmode,preset='gameboy'raises ValueError, overrides (palette=16on snes) work.Credit: @dodo-reach — original commit preserved via cherry-pick with their authorship intact.
Closes #8930.