0035 — Dual-Ceiling Population Model (Citadel-Bound vs Habitability-Bound)

Status

Folded into FEATURES/planets/colonization.md (2026-06-19). max_colonists is a citadel-tier workforce ceiling (L1 1,000 → L5 200,000) and max_population is the habitability-derived demographic ceiling (habitability_score × 1,000); the two are independent caps, neither substituting for the other.

Context

Four incompatible population formulas across the docs and world generators were reconciled into two independent ceilings — one driven by citadel tier, one by habitability.

Folded into

The durable rule now lives in FEATURES/planets/colonization.md (dual-ceiling model, formulas, runtime invariants, and Genesis/colonization initialization). This record is retained for decision history per the append-only ADR policy.