/**
 * Readonly context carrying agent and user identity.
 * Passed to tools, signals, and scheduled tasks for user-scoped operations.
 */
export declare class Context {
    readonly userId: string;
    readonly hasAgentId?: boolean;
    constructor(input: {
        userId: string;
        agentId?: string;
    });
    get agentId(): string;
}
/**
 * Creates a user-scoped context without an agent identity.
 * Expects: userId is already validated by caller.
 */
export declare function contextForUser(input: {
    userId: string;
}): Context;
/**
 * Creates an agent-scoped context with both user and agent identity.
 * Expects: userId and agentId are already validated by caller.
 */
export declare function contextForAgent(input: {
    userId: string;
    agentId: string;
}): Context;
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