/** Public game I/O is pixels plus neutral controls. Metadata/solutions remain author-only. */
export type Button=1|2|3|4|5|6;
export interface GameAction {button:Button;x?:number;y?:number}
export interface PixelObservation {pixels:number[][];actions:Button[];level:number;status:'playing'|'won'}
export interface EpisodeInit<S=any> {state:S;witness:GameAction[]}
export interface Environment<S=any> {
 id:string;
 /** Private author metadata; NEVER rendered or given to a blind solver. */
 name:string;family:string;version:string;levels:number;
 mechanics:string[];stateVariables:string[];novelty:string;
 init(level:number,seed:number):EpisodeInit<S>;
 observe(state:S):PixelObservation;
 step(state:S,action:GameAction):S;
 solved(state:S):boolean;
}
export function clone<T>(v:T):T{return structuredClone(v)}
export function random(seed:number){let a=seed>>>0;return()=>{a+=0x6d2b79f5;let t=a;t=Math.imul(t^t>>>15,t|1);t^=t+Math.imul(t^t>>>7,t|61);return((t^t>>>14)>>>0)/4294967296}}
export function grid(w:number,h:number,fill=0){return Array.from({length:h},()=>Array(w).fill(fill))}
export function action(button:Button,x?:number,y?:number):GameAction{return{x,y,button}}