A source-backed retained-DOM PolyCSS port of XScreenSaver menger.
The implemented first slice is a deterministic depth-3 sponge prepared from the pinned XScreenSaver 6.15 source semantics. Preparation generates the exact 18,048 visible source-face census, proves the 9,528-leaf minimum rectangular fallback, then prebakes its holes into 84 coverage-proven directional-plane atlas bundles. It prepares 1,536 rotator/palette states and exports one stable PolyCSS snapshot with only camera/scene projection roots and 84 direct leaves. Preparation bakes moving two-light color into one Q83 AVIF atlas, byte-dedupes its source-cell tiles, and emits one forward exact delta address schedule. The first 995 states retain the native rotator exactly; preparation then closes the sequence into a 46.08 second C2 forward cycle with continuous orientation, velocity, acceleration, and palette cadence. The compositor publishes prepared rotation every 30 ms. Default lighting is held for 60 ms; the CSS-opacity presentation publishes prepared lighting every 30 ms. Runtime performs no lighting math, geometry, merging, address comparison, or DOM construction.
pnpm install
CSSMENGER_SOURCE_ROOT=/path/to/pinned/xscreensaver pnpm prepare:menger:source
pnpm test:menger
pnpm test:menger:assets
pnpm build:menger
pnpm test:menger:browser
CSSMENGER_SOURCE_ROOT=/path/to/pinned/xscreensaver pnpm oracle:mengerThe source checkout must be at commit
906693799e4fb7581436590cf84ecb2d3c9186ba. Generated assets, source
checkouts, screenshots, and oracle evidence stay ignored locally.
The oracle follows the cssFlower exact-first shape over native/browser ticks 0-45: exact source binding, native state and frame A/A, browser frame A/A, exact source-state comparison, and native/browser/absolute-diff artifacts. Source state is exact and both A/A gates are pixel-exact. Native/browser pixels intentionally diverge because the prepared browser product trades Q83 atlas encoding, prepared cycle closure, and profile-specific lighting cadence for lower transfer and runtime work, so native visual parity remains unqualified.