/**
 * time/checkRecord — the record half of the result checks (time design
 * § 9.2, § 9.6, step T8): the shapes a `period` row carries
 * (`PeriodDiffers`, `ReadSource`), the checkpoint door's tests for them
 * (`isPeriodDiffers`, `isShifted`), and the two reads over the turn's
 * wall-clock sources (`distinctSources`, `clocksDiffer`).
 *
 * Pattern: pure shapes and guards; no conversion, no drift, no clock.
 * Role:    split from `check.ts` BY FILE for the synchronous doors — the
 *          checkpoint door's row test (`coverage/period.ts` ·
 *          `periodRowIsWellFormed`) is on every agent's graph, and a bundler
 *          places a whole file there — so this file imports only
 *          `instant.ts` and the range and zone types (the optional-family
 *          law, `test/trace-toolpack/browserGraph.test.ts`). `check.ts`
 *          re-exports every public name.
 * Emits:   N/A.
 *
 * @example
 * ```ts
 * clocksDiffer([
 *   { toolName: 'orders', zone: 'America/New_York' },
 *   { toolName: 'tickets', zone: 'Europe/Berlin' },
 * ]); // { tools: ['orders', 'tickets'], zones: ['America/New_York', 'Europe/Berlin'] }
 * ```
 */
import type { TimeRange } from './range.js';
import type { ZoneName } from './zone.js';
/** Where a check's read range came from — see the module table. */
export type ReadSource = 'declared' | 'sent' | 'shifted' | 'asked';
/**
 * `period-differs-from-asked` (§ 9.2): the range compared against, what was
 * read, and the two lists — each piece half-open, in time order, spelled in
 * UTC. At least one list is non-empty (an empty check is not filed).
 */
export interface PeriodDiffers {
    /** `asked` — the call's asked range; `person` — the person's window, for a window the model chose. */
    readonly against: 'asked' | 'person';
    /** The range compared against. */
    readonly asked: TimeRange;
    /** What the call read — one range per declared period, else one. */
    readonly read: readonly TimeRange[];
    readonly source: ReadSource;
    /** The step a declared inclusive end was read back with (§ 3.3) — `source: 'declared'` only. */
    readonly stepMs?: number;
    /** Asked but not read. */
    readonly missing: readonly TimeRange[];
    /** Read but not asked. */
    readonly extra: readonly TimeRange[];
}
/** A dataset of one call whose declared time axis names a zone — a wall-clock source. */
export interface SourceClock {
    readonly toolName: string;
    readonly zone: ZoneName;
}
/** `clocks-differ` (§ 9.6): the wall-clock sources of one answer, when they declare different zones. */
export interface ClocksDiffer {
    readonly tools: readonly string[];
    readonly zones: readonly ZoneName[];
}
/**
 * The wall-clock sources of one answer, one per tool and zone in the order
 * met — the limits block names each. Fresh plain objects.
 */
export declare function distinctSources(sources: readonly SourceClock[]): SourceClock[];
/**
 * `clocks-differ` (§ 9.6) — the tools and zones when the wall-clock sources
 * of one answer declare more than one zone; `undefined` otherwise. A label
 * only: it changes no standing, and every comparison is made on instants.
 */
export declare function clocksDiffer(sources: readonly SourceClock[]): ClocksDiffer | undefined;
/** The checkpoint door's test for a row's {@link PeriodDiffers}. */
export declare function isPeriodDiffers(value: unknown): value is PeriodDiffers;
/** The checkpoint door's test for a row's `shifted`. */
export declare function isShifted(value: unknown): boolean;