import type { MemoryHistorySnapshot } from "./memory.js";
/** Displayed short ID length used in /memory history output. */
export declare const MEMORY_SNAPSHOT_SHORT_ID_LENGTH = 8;
/** Machine-readable error codes for snapshot selector resolution. */
export type SnapshotResolutionError = "empty" | "not_found" | "ambiguous";
/**
 * Result of strict snapshot selector resolution.
 *
 * Contract:
 * - `matchedInput` is always the normalized selector actually evaluated
 * - `resolvedId` is the full `entryId` when resolution succeeds
 * - `candidates` is populated only for ambiguous-prefix failures
 */
export interface SnapshotResolution {
    snapshot: MemoryHistorySnapshot | undefined;
    matchedInput: string;
    resolvedId: string | undefined;
    error: SnapshotResolutionError | undefined;
    candidates: string[];
}
/**
 * Normalize a raw snapshot selector typed or pasted by the operator.
 *
 * Accepted normalization rules:
 * - trim surrounding whitespace
 * - strip one pair of surrounding brackets copied from `/memory history`
 * - treat `[]` as empty input
 */
export declare function normalizeSnapshotSelector(input: string): string;
/** Resolve a snapshot selector against a provided current-branch snapshot list. */
export declare function resolveSnapshotSelector(selector: string, snapshots: readonly MemoryHistorySnapshot[]): SnapshotResolution;
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