import type { LanguageModel, ModelMessage } from 'ai';
import type { AgentConfig } from '../types/agentConfig.js';
import type { Flow } from '../types/flow.js';
import type { RunState } from './durable/types.js';
import { availableHostFlows } from './hostControlTools.js';
import type { StreamPart } from '../types/stream.js';
import type { RunStore } from './durable/RunStore.js';
export type HostSelection = {
    kind: 'enterFlow';
    flow: Flow;
} | {
    kind: 'route';
    agentId: string;
    reason?: string;
} | {
    kind: 'keep';
};
export interface HostGuardVerdict {
    action: 'keep' | 'enterFlow' | 'transfer';
    flowName?: string;
    targetAgentId?: string;
    reason?: string;
    confidence?: number;
}
export declare const DEFAULT_CLASSIFIER_CONTEXT_MESSAGES = 6;
export interface ClassifyHostOptions {
    agent: AgentConfig;
    run: RunState;
    model: LanguageModel;
    allowKeep: boolean;
    excludeFlowNames?: string[];
    /** How many recent messages to include in the classifier prompt. Default: 6. */
    contextMessageLimit?: number;
    emit?: (part: StreamPart) => void;
    abortSignal?: AbortSignal;
    runStore?: RunStore;
}
export declare function classifyHostTarget(options: ClassifyHostOptions): Promise<HostGuardVerdict>;
/** @deprecated Use classifyHostTarget — kept as alias for test injection. */
export declare function selectHostTarget(options: Omit<ClassifyHostOptions, 'allowKeep'> & {
    alwaysRoute?: boolean;
}): Promise<HostSelection>;
export declare function verdictToSelection(verdict: HostGuardVerdict, agent: AgentConfig): HostSelection | undefined;
export declare function formatRecentConversation(messages: ModelMessage[], limit?: number): string;
export { availableHostFlows };