import type { AiMiddleware, BeforeToolCallResult, MiddlewareConfigResult, MiddlewareContext, StreamChunk, TokenUsage } from './types.js';
/** Run onConfig hooks — piped (each transforms config, next sees result) */
export declare function runOnConfig(middlewares: AiMiddleware[], ctx: MiddlewareContext, config: MiddlewareConfigResult, phase: 'init' | 'beforeModel'): MiddlewareConfigResult;
/** Run onChunk hooks — piped (each can transform or drop by returning null) */
export declare function runOnChunk(middlewares: AiMiddleware[], ctx: MiddlewareContext, chunk: StreamChunk): StreamChunk | null;
/** Run onBeforeToolCall hooks — first non-void result wins */
export declare function runOnBeforeToolCall(middlewares: AiMiddleware[], ctx: MiddlewareContext, toolName: string, args: Record<string, unknown>): Promise<BeforeToolCallResult>;
/** Run a sequential hook (onStart, onIteration, onAfterToolCall, etc.) */
export declare function runSequential(middlewares: AiMiddleware[], hook: 'onStart' | 'onIteration' | 'onToolPhaseComplete' | 'onFinish', ctx: MiddlewareContext): Promise<void>;
/** Run onAfterToolCall hooks sequentially */
export declare function runOnAfterToolCall(middlewares: AiMiddleware[], ctx: MiddlewareContext, toolName: string, args: Record<string, unknown>, result: unknown): Promise<void>;
/** Run onUsage hooks sequentially */
export declare function runOnUsage(middlewares: AiMiddleware[], ctx: MiddlewareContext, usage: TokenUsage): Promise<void>;
/** Run onAbort hooks sequentially */
export declare function runOnAbort(middlewares: AiMiddleware[], ctx: MiddlewareContext, reason: string): Promise<void>;
/** Run onError hooks sequentially */
export declare function runOnError(middlewares: AiMiddleware[], ctx: MiddlewareContext, error: unknown): Promise<void>;
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