Prior art

What exists already, what Stipple learned from it and where it differs.

• dithercn is a set of dithered components for React and shadcn, with GLSL fields, MIT licensed. Its idea of one engine under many components, themed with an ink and a paper colour, and its agent skill for writing new dithers, were the inspiration for Stipple. Stipple shares no code with it.
• Paper Shaders for Android ports Paper Design’s shaders, including dithering and halftone, to AGSL. It is Android only, needs API 33 and isn’t on Maven.
• dither-kit-compose is a Compose library of dithered components. It uses a single Bayer 4x4 pattern, has no pattern or field abstraction and no modifiers, and has no web target.

What Stipple adds: a small engine (patterns, fields, themes) separate from the components, modifiers that dither any element, a cell renderer that works back to Android 6, an optional shader renderer, error diffusion for images, reduced motion on every platform, and a skill file for coding agents.

Not covered yet

• Globes and maps from dithercn.
• Frame times on low-end Android devices and on a physical iPhone are not measured.