/** Whether a metadata id uses Claude Code's legacy cloaking shape. */
export declare function isClaudeCloakingUserId(userId: string): boolean;
/** Extract a stable session id from a supported Anthropic metadata user id. */
export declare function extractClaudeMetadataSessionId(userId: unknown): string | undefined;
/** Generate a legacy Claude Code cloaking metadata id. */
export declare function generateClaudeCloakingUserId(): string;
/** Derive the stable Claude device id for an installation and optional account. */
export declare function deriveClaudeDeviceId(installId: string, accountId?: string): string;
/** Read a non-empty string from provider metadata. */
export declare function readAnthropicMetadataString(metadata: Record<string, unknown> | undefined, key: string): string | undefined;
/** Resolve the account id aliases accepted in Anthropic request metadata. */
export declare function readAnthropicMetadataAccountId(metadata: Record<string, unknown> | undefined): string | undefined;
/** Resolve the provider-facing metadata user id for API-key or OAuth requests. */
export declare function resolveAnthropicMetadataUserId(userId: unknown, isOAuthToken: boolean, sessionId?: string, accountId?: string): string | undefined;
/** Apply Claude Code's wire-only tool prefix. */
export declare const applyClaudeToolPrefix: (name: string) => string;
/** Remove one Claude Code wire-only tool prefix. */
export declare const stripClaudeToolPrefix: (name: string) => string;