export interface BoardTask {
    id: number;
    title: string;
    detail: string | null;
    state: "open" | "claimed" | "done" | "dropped";
    /** Ids it waits on: claimable once each is done (a dropped one does not hold it). */
    after: number[];
    /** Who put it on the board: "user", "concierge", or a session's name (its job id when a job). */
    by: {
        who: string;
        whoId: string | null;
    };
    at: number;
    /** The session that holds it (claimed), or held it (done). */
    owner: {
        id: string;
        name: string;
    } | null;
    claimedAt: number | null;
    doneAt: number | null;
    result: string | null;
    /** Handed to a session by the hub or the concierge (a message there); open until that session claims it. */
    assigned: {
        id: string;
        name: string;
        at: number;
    } | null;
}
export declare const TASK_MAX = 200;
export declare const TASK_TITLE_MAX = 200;
export declare const TASK_TEXT_MAX = 2000;
export interface BoardSummary {
    open: number;
    claimed: number;
    blocked: number;
    done: number;
}
/** The ids a task still waits on: the ones that exist and are neither done nor dropped. */
export declare function blockedOn(t: BoardTask, all: Iterable<BoardTask>): number[];
/** Open, claimed, blocked (open but waiting on another) and done, counted. */
export declare function boardSummary(all: BoardTask[]): BoardSummary;
/** `3 open · 2 claimed · 1 blocked · 5 done` (what is zero left out; "none" when the board is empty). */
export declare function summaryLine(s: BoardSummary): string;
export declare function taskLine(t: BoardTask, all: Iterable<BoardTask>, now?: number): string;
/** Open (claimable) first, then blocked, then claimed: the order the digest and the hub list live tasks in. */
export declare function liveOrder(t: BoardTask, all: BoardTask[]): number;
/** The board for a digest: the summary line, then every task that is not done or dropped (open, blocked, claimed). */
export declare function boardLines(all: BoardTask[], now?: number): string[];
/** The board for a tool's answer: boardLines, then the last `doneMax` done tasks (newest last). */
export declare function boardListing(all: BoardTask[], now?: number, doneMax?: number): string[];