import type { Context } from './types/context.js';
import type { AgentMessage, UserMessage } from './types/agent-message.js';
import type { AgentEvent, ThinkingLevel, ToolExecutionMode } from './types/agent-event.js';
import type { Model } from './types/model.js';
import type { LlmTool, ParsedToolCall } from './types/tool.js';
import { type StreamOptions } from './api-registry.js';
export interface BeforeToolCallContext {
    toolCall: ParsedToolCall;
    tools: LlmTool[];
}
export interface BeforeToolCallResult {
    allowed?: boolean;
    reason?: string;
    modifiedArguments?: Record<string, unknown>;
}
export interface AfterToolCallContext {
    toolCall: ParsedToolCall;
    result: AgentMessage;
}
export interface AgentLoopConfig {
    model: Model;
    maxIterations?: number;
    reasoning?: ThinkingLevel;
    sessionId?: string;
    toolExecution?: ToolExecutionMode;
    convertToLlm?: (messages: AgentMessage[]) => AgentMessage[] | Promise<AgentMessage[]>;
    transformContext?: (messages: AgentMessage[], signal?: AbortSignal) => Promise<AgentMessage[]>;
    beforeToolCall?: (context: BeforeToolCallContext, signal?: AbortSignal) => Promise<BeforeToolCallResult | void>;
    afterToolCall?: (context: AfterToolCallContext, signal?: AbortSignal) => Promise<void>;
    executeTool?: (toolCall: ParsedToolCall, tools: LlmTool[], signal?: AbortSignal) => Promise<AgentMessage>;
    getSteeringMessages?: () => Promise<AgentMessage[]>;
    getFollowUpMessages?: () => Promise<AgentMessage[]>;
    onContextOverflow?: (messages: AgentMessage[], signal?: AbortSignal) => Promise<AgentMessage[] | null | undefined>;
    streamOptions?: Omit<StreamOptions, 'signal'>;
}
export interface AgentContext {
    systemPrompt: string;
    messages: AgentMessage[];
    tools: LlmTool[];
}
export declare function agentLoop(prompts: AgentMessage | AgentMessage[], initialContext: AgentContext, config: AgentLoopConfig, signal?: AbortSignal): AsyncGenerator<AgentEvent>;
export declare function agentContextFrom(context: Context): AgentContext;
export type { UserMessage };
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