export declare const TASK_STATE_TYPE = "task-state";
export declare const TASK_STATE_FIELDS: readonly ["goal", "next", "blocked", "done"];
export type TaskStateField = (typeof TASK_STATE_FIELDS)[number];
export type TaskState = Partial<Record<TaskStateField, string>> & {
    updated_at?: string;
    legacy_updated_at?: string;
    stated_at?: Partial<Record<TaskStateField, string>>;
};
export declare const MAX_FIELD_CHARS = 300;
export declare function taskStateName(project: string): string;
export declare function taskStateUnreadableMessage(project: string): string;
export declare function parseTaskState(metadata: unknown): TaskState;
export declare function normalizeFieldValue(value: string): string | null;
export interface TaskStateMerge {
    state: TaskState;
    changed: TaskStateField[];
    observations: string[];
}
export declare function mergeTaskState(previous: TaskState, patch: Partial<Record<TaskStateField, string>>, now: string): TaskStateMerge;
export declare function isEmptyTaskState(state: TaskState): boolean;
export declare function taskStateLines(state: TaskState, project: string, now?: Date): string[];
export declare const STALE_TASK_STATE_HOURS = 72;
export declare const CLOCK_SKEW_ALLOWANCE_MINUTES = 5;
export declare function briefingTaskStateLines(state: TaskState, project: string, now?: Date, { includeFresh }?: {
    includeFresh?: boolean;
}): string[];
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