import type { LLMMessage } from '../llm/llm-provider.js';
import type { Message } from '../session/session-jsonl.js';
export type TaskFrameStatus = 'active' | 'paused_resumable' | 'completed' | 'error' | 'aborted';
export type TaskFrameSource = 'user' | 'tool' | 'assistant' | 'compaction' | 'guard' | 'max_turns' | 'error' | 'abort';
export interface TaskFrameToolFinding {
    toolName: string;
    summary: string;
    isError: boolean;
    at: number;
}
export interface TaskFrame {
    schemaVersion: 1;
    sessionKey: string;
    runId?: string;
    goal: string;
    constraints: string[];
    currentStep: string;
    completedSteps: string[];
    pendingSteps: string[];
    artifacts: string[];
    importantPaths: string[];
    toolFindings: TaskFrameToolFinding[];
    lastError?: string;
    nextAction: string;
    status: TaskFrameStatus;
    source: TaskFrameSource;
    updatedAt: number;
}
export interface TaskFrameLoadResult {
    frame?: TaskFrame;
    messages: Message[];
}
export interface ContinuationIntent {
    isContinuation: boolean;
    isArchiveLookup: boolean;
}
export declare function isTaskFrameCheckpointMessage(message: Message | LLMMessage): boolean;
export declare function splitTaskFrameCheckpointMessages(messages: Message[]): TaskFrameLoadResult;
export declare function detectContinuationIntent(userMessage: string): ContinuationIntent;
export declare function createOrUpdateTaskFrame(params: {
    previous?: TaskFrame;
    sessionKey: string;
    runId: string;
    userMessage: string;
    now?: number;
}): TaskFrame;
export declare function recordTaskFrameToolStart(frame: TaskFrame, toolName: string, input: Record<string, unknown>, now?: number): TaskFrame;
export declare function recordTaskFrameToolEnd(frame: TaskFrame, params: {
    toolName: string;
    input?: Record<string, unknown>;
    result: string;
    isError: boolean;
    aborted?: {
        by: 'user' | 'timeout';
    };
    now?: number;
}): TaskFrame;
export declare function recordTaskFrameCompaction(frame: TaskFrame, params: {
    summaryChars: number;
    droppedMessages: number;
    now?: number;
}): TaskFrame;
export declare function recordTaskFrameAssistant(frame: TaskFrame, text: string, stopReason: string, now?: number): TaskFrame;
export declare function recordTaskFrameStop(frame: TaskFrame, params: {
    reason: 'max_turns' | 'error' | 'abort';
    detail?: string;
    now?: number;
}): TaskFrame;
export declare function createTaskFrameCheckpointMessage(frame: TaskFrame): LLMMessage;
export declare function buildTaskFrameContext(frame: TaskFrame, intent: ContinuationIntent): string;
export declare function stripTaskFrameCheckpointsFromLlmMessages(messages: LLMMessage[]): LLMMessage[];
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