import type { LanguageModel, ModelMessage } from 'ai';
import type { AgentContext, FlowAgentConfig, FlowManagerState, RunContext, Session } from '../../types/index.js';
import type { ConversationState } from '../../foundation/ConversationState.js';
export declare function getFlowState(session: Session, agentId: string): FlowManagerState | undefined;
/** Resolve per-node `model` override for flow agents (e.g. extraction, secondary LLM calls). */
export declare function resolveFlowNodeLanguageModel(agent: FlowAgentConfig, session: Session): LanguageModel | undefined;
export declare function setFlowState(session: Session, agentId: string, state: FlowManagerState, conversationState: ConversationState): void;
export declare function clearFlowState(session: Session, agentId: string, conversationState: ConversationState): void;
export declare function updateFlowStateSnapshot(session: Session, agentId: string, state: FlowManagerState): void;
export declare function normalizeSessionHistory(messages: ModelMessage[]): ModelMessage[];
export declare function appendSessionMessage(session: Session, message: ModelMessage, conversationState: ConversationState): void;
export declare function appendSessionMessages(session: Session, messages: ModelMessage[], conversationState: ConversationState): void;
export declare function buildAgentContext(input: string, context: RunContext, conversationState: ConversationState, abortSignal?: AbortSignal): AgentContext;