/** Stored self-context id, or null when absent, empty, or path-like. */
export declare function normalizeStoredSelfContextId(value: unknown): string | null;
/**
 * Agent-facing projection of an `agentSelfContexts` document; null for anything
 * that is not a usable cross-session context. Ownership and conversation
 * scoping stay with the CALLER — both consumers check them against their own
 * Firestore handle before calling this.
 */
export declare function serializeSelfContext(id: string, data: Record<string, unknown>): Record<string, unknown> | null;