export declare const SUPERVISION_WATCH_KIND: "supervision.watch";
export declare const SUPERVISION_MODE_LIVE_STEER: "live_steer";
export declare const MAX_SUPERVISION_OBSERVERS = 4;
export declare const DEFAULT_STEERS_PER_SUBJECT_TURN = 3;
export declare const SUPERVISION_EXCERPT_CHARS = 500;
export declare const SUPERVISION_CONTENT_FLUSH_CHARS = 4096;
export declare const SUPERVISION_SNAPSHOT_MESSAGE_LIMIT = 8;
export declare const SUPERVISION_WATCH_PROTOCOL_NOTE: string;
export type SupervisionMode = typeof SUPERVISION_MODE_LIVE_STEER;
export type SupervisionTurnRole = "worker" | "observer";
export type SupervisionSteerAction = "nudge" | "interrupt";
export type SupervisionMilestoneKind = "turn.started" | "tool.started" | "tool.completed" | "content.flushed" | "turn.terminal";
export interface SupervisionPairSpec {
    observers: readonly string[];
    mode: SupervisionMode;
}
export interface SupervisionWatchWorker {
    actorId: string;
    turnId: string;
}
export interface SupervisionSnapshotTool {
    name: string;
    status: "started" | "completed";
    toolCallId?: string;
}
export interface SupervisionSnapshotMessage {
    eventId: string;
    excerpt: string;
}
export interface SupervisionSnapshot {
    turnId: string;
    status: string;
    deliveryCertainty?: string;
    lastSeq: number;
    watchCursor: number;
    terminal: boolean;
    subjectCancelled: boolean;
    task: {
        eventId: string;
        excerpt: string;
    };
    messages: SupervisionSnapshotMessage[];
    tools: SupervisionSnapshotTool[];
    steerCount: number;
    lastSteerReason?: string;
}
export interface SupervisionMilestone {
    kind: SupervisionMilestoneKind;
    turnId: string;
    watchCursor: number;
    seq: number | null;
    status?: string;
    tool?: SupervisionSnapshotTool;
    excerpt?: string;
}
export declare function isSupervisionWatchMessage(body: unknown): boolean;
export declare function excerptText(value: string, maxChars?: number): string;
export declare function toolNameFromDetails(details: unknown): string;
export declare function buildSupervisionWatchBrief(input: {
    task: string;
    workers: readonly SupervisionWatchWorker[];
    observers: readonly string[];
}): string;
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