Every world-editing op and its fields, as JSON Schema.

The ops world_apply accepts (add_zone, add_npc, add_quest, add_link, set_worldgen and the rest), each with its fields as JSON Schema: types, bounds, the closed lists of words and which keys are required. Printed from the same table the engine validates against, so it cannot drift from what is accepted. Pass op to get one op's schema alone. Costs no units.