import type { ActionObservationPayload, HookInput, TokenFingerprint } from './types.js';
export declare function stableJson(value: unknown): string;
export declare function fingerprintSurface(value: unknown, sessionSalt: string): TokenFingerprint[];
export declare function normalizeActionClass(toolName: string, toolInput: Record<string, unknown>): string;
export declare function transcriptSequence(input: HookInput): {
    seq?: number;
    transcriptRef?: string;
};
export declare function buildActionObservation(input: HookInput, sessionSalt: string): ActionObservationPayload | undefined;