Buff

"All effects are buffs. Some are just shitty."

Buffs modify stats, abilities, or behavior. They have durations, can stack, and come from various sources. Curses are just negative buffs — no separate system.

Characters Only

Buffs only target characters. This is a design constraint, not a limitation.

• Single closure signature: (world, subject, verb, object)
• subject is always a character — no type checking needed
• Rooms that need buffs get a "room spirit" character