Content model · A (procedural): The 66 templates below are generation rules, not daily content. Every template marked live is part of the active rotation; the picker hashes (round_id, salt) to choose templates per round (weighted by each template's weight), so each player sees a fresh sequence from the same set. Operand ranges, per-template weight, and enable/disable are admin-editable on the Manage rules page — edits go live within ~60s, no redeploy. Adding a brand-new skill still means editing internal/minigames/mentalmath/templates.go (code owns the math). Pool-health runway is infinite for this game.