export declare const DEFAULT_AGENT_ID = "main";
/** Normalized id segment safe for directory names under `agents/<id>/`. */
export declare const STRICT_AGENT_ID_RE: RegExp;
/** Path-safe agent id. */
export declare function normalizeAgentId(value: string | undefined | null): string;
/** Derive a folder-safe id, including for display names with no ASCII characters. */
export declare function deriveAgentIdFromDisplayName(displayName: string): string;
/** Validate a new Agent id before it becomes a filesystem path segment. */
export declare function validateAgentIdForNewAgent(explicitId: string | undefined | null, displayNameForDerivation: string): {
    ok: true;
    agentId: string;
} | {
    ok: false;
    error: string;
};