import type { Agent, AgentConfig, AgentMiddleware, AgentOutputSchema, InferAgentOutputSchema } from "./types.js";
/**
 * Agent helper.
 *
 * `TOutput` is inferred from `config.outputSchema`, so `response.object` is
 * typed without an annotation. Agents without one keep no `object`.
 */
export declare function agent<TOutputSchema extends AgentOutputSchema>(config: AgentConfig<InferAgentOutputSchema<TOutputSchema>> & {
    outputSchema: TOutputSchema;
}): Agent<InferAgentOutputSchema<TOutputSchema>>;
export declare function agent<TOutput = never>(config: AgentConfig<TOutput>): Agent<TOutput>;
/**
 * Build an agent runtime without adding it to the project registry.
 *
 * Framework facades use this when they need the agent runtime pipeline for a
 * single call, but must not expose a reusable agent in registry-backed
 * listings.
 */
export declare function createEphemeralAgent<TOutputSchema extends AgentOutputSchema>(config: AgentConfig<InferAgentOutputSchema<TOutputSchema>> & {
    outputSchema: TOutputSchema;
}): Agent<InferAgentOutputSchema<TOutputSchema>>;
export declare function createEphemeralAgent<TOutput = never>(config: AgentConfig<TOutput>): Agent<TOutput>;
/**
 * Resolve the middleware array for an agent, prepending security middleware
 * unless explicitly opted out with `security: false`.
 *
 * The security middleware does not impose any input character limit: agent
 * input (latest user message plus conversation history and structured tool
 * results) can be arbitrarily large. Prompt-injection pattern blocking and
 * output PII filtering still apply.
 */
export declare function resolveSecurityMiddleware(config: Pick<AgentConfig, "security" | "middleware">): AgentMiddleware[];
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