Seed. The universe is seeded with EARTH-GENESIS-0001. A xmur3 string hash initializes sfc32. No Math.random() is used; every choice comes from deterministic integer hashes or the seeded PRNG.
A wrapped equirectangular planet is stored as a 180×100 cellular map. Continents are fractal value-noise fields mixed with latitude falloff, then raised by drifting tectonic plates. Rivers are approximated by steep wet downhill traces; erosion slowly lowers high wet slopes and feeds coasts.
Latitude controls solar input: equator warm, poles cold. Altitude cools air. Seasonal oscillation moves the thermal belt over years. Moisture comes from ocean proximity, winds, rain shadow, rivers, and biomass recycling.
Each cell carries nutrients, microbes, plants, herbivores, predators and culture. Growth spends sunlight, water and nutrients. Consumers diffuse, feed, reproduce and die. Regional genotypes mutate resistance, water need and temperature preference; successful regions spread, failed ones vanish.
The sun drives primary production. Scarcity creates crashes. One rendered frame advances one simulated month; at 60fps roughly five years pass each real second. Generations turn in minutes; ten minutes is planetary deep time.
It does not understand consciousness, meaning, language, or why an observer cares. It mistakes abundance for purpose and collapse for silence.