/**
 * search/door — which result door a search tool's value came through, and the
 * facts composition reads off it.
 *
 * Pattern: one pure reader over the three doors a tool returns through —
 *          `absent()`, `coverage()`, `describedResult()` — by their own
 *          recognizers. No fourth door.
 * Role:    semantics/ layer, pure.
 * Emits:   N/A.
 *
 * A search tool's coverage comes from its declaration, so a result that ALSO
 * hand-writes a `checked` list is declined (`checked-beside-declared`): the
 * library reads it as written, files today's row, and composes nothing — a
 * row it did not compose establishes nothing. A `coverage()` wrapped around
 * `absent({ checked: 'declared' })` is refused: the declaration is the
 * boundary, so the absence is returned on its own.
 */
import { type DeclaredPeriod } from '../period.js';
import type { CoverageItem, DeclaredCoveredResult, DeclaredToolAbsence } from '../types.js';
import { type PagingDeclaration, type ResolvedDeclaration } from './resultFacts.js';
/** The facts one door carries, as composition reads them. */
export interface DoorFacts {
    readonly door: 'declared-absence' | 'declared-coverage' | 'described' | 'coverage';
    /** How many rows came back; `undefined` when they cannot be counted. */
    readonly rows: number | undefined;
    readonly resolved?: readonly ResolvedDeclaration[];
    readonly paging?: PagingDeclaration;
    readonly period?: DeclaredPeriod;
    readonly handNotChecked: readonly CoverageItem[];
    readonly handCannotCover: readonly CoverageItem[];
    /** The envelope to compose in place of — present for the two `'declared'` doors. */
    readonly absence?: DeclaredToolAbsence;
    readonly ledger?: DeclaredCoveredResult;
}
/** What a value is, to a search tool's composition. */
export type DoorReading = {
    readonly outcome: 'door';
    readonly facts: DoorFacts;
} | {
    readonly outcome: 'checked-beside-declared';
};
/**
 * Read `value` as one of the three doors, or `undefined` when it is none of
 * them (plain data: nothing is composed).
 */
export declare function readSearchDoor(value: unknown, toolName: string): DoorReading | undefined;