/**
 * Branded entity IDs for the harness/runtime contract.
 *
 * Pattern adapted from pingdotgg/t3code (`packages/contracts/src/baseSchemas.ts`).
 * Branded string types prevent accidentally passing a SessionId where a TurnId
 * is expected — caught at compile time, zero runtime cost.
 */
declare const brand: unique symbol;
export type Brand<T, B extends string> = T & {
    readonly [brand]: B;
};
export type HarnessId = Brand<string, "HarnessId">;
export type ProviderInstanceId = Brand<string, "ProviderInstanceId">;
export type SessionId = Brand<string, "SessionId">;
export type ThreadId = Brand<string, "ThreadId">;
export type TurnId = Brand<string, "TurnId">;
export type ToolCallId = Brand<string, "ToolCallId">;
export type EventId = Brand<string, "EventId">;
export type WorkspaceId = Brand<string, "WorkspaceId">;
export type AnyEntityId = HarnessId | ProviderInstanceId | SessionId | ThreadId | TurnId | ToolCallId | EventId | WorkspaceId;
declare const PREFIXES: {
    readonly HarnessId: "hns";
    readonly ProviderInstanceId: "prv";
    readonly SessionId: "ses";
    readonly ThreadId: "thr";
    readonly TurnId: "trn";
    readonly ToolCallId: "tcl";
    readonly EventId: "evt";
    readonly WorkspaceId: "wsp";
};
type EntityKind = keyof typeof PREFIXES;
export declare function makeId<K extends EntityKind>(kind: K): Brand<string, K>;
export declare function asId<K extends EntityKind>(kind: K, raw: string): Brand<string, K>;
export declare function isId<K extends EntityKind>(kind: K, raw: unknown): raw is Brand<string, K>;
export declare function entityKindOf(raw: string): EntityKind | null;
export {};