/** Shared task filtering and enumeration truth (T12200). */
import type { DataAccessor, Task, TaskPopulation, TaskQueryFilters } from '@cleocode/contracts';
/**
 * Apply identical eligibility to ordinary and archived task rows.
 * @param task - Candidate task from either storage population.
 * @param filters - Axis, parent, label and phase eligibility constraints.
 * @returns Whether the candidate satisfies every supplied constraint.
 * @remarks Archive inclusion is handled by the population reader, before pagination.
 * @example
 * ```ts
 * const eligible = matchesTaskFilters(task, { parentId: "T001" });
 * ```
 */
export declare function matchesTaskFilters(task: Task, filters: TaskQueryFilters): boolean;
/**
 * Read the full eligible population before matching or pagination.
 * @param accessor - Project-bound canonical task store.
 * @param filters - Eligibility constraints; pagination fields are deliberately ignored.
 * @param includeArchive - Include archived storage rows with the same filters.
 * @returns Eligible task rows deduplicated by task identity.
 * @remarks Archive read errors propagate; they must not imply an empty population.
 * @example
 * ```ts
 * const tasks = await readTaskPopulation(accessor, { parentId: "T001" }, true);
 * ```
 */
export declare function readTaskPopulation(accessor: DataAccessor, filters: TaskQueryFilters, includeArchive?: boolean): Promise<Task[]>;
/**
 * Slice once and retain explicit match, returned, pagination and archive facts.
 * @typeParam T - Eligible row shape retained without projection.
 * @param rows - Entire matched population in presentation order.
 * @param limit - Non-negative page size; zero returns all rows after offset.
 * @param offset - Non-negative count of initial matched rows to skip.
 * @param archive - Archive inclusion policy used when assembling the population.
 * @returns Selected rows and matched-versus-returned population facts.
 * @remarks Invalid or fractional bounds are rejected rather than rounded or defaulted.
 * @example
 * ```ts
 * const page = paginateTaskPopulation(tasks, 10, 0, "excluded");
 * ```
 */
export declare function paginateTaskPopulation<T>(rows: T[], limit: number, offset?: number, archive?: TaskPopulation['archive']): {
    rows: T[];
    population: TaskPopulation;
};
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