/**
 * Child session backfill from SDK messages.
 *
 * Extracted from EventCapture to reduce module size and enable independent
 * testing. Handles backfilling turns and lastMessage from OpenCode SDK
 * messages when a child session completes.
 *
 * @module session-tracker/capture/child-backfiller
 */
import type { OpenCodeClient } from "../../../shared/session-api.js";
import type { ChildWriter } from "../persistence/child-writer.js";
/**
 * Dependencies for child session backfill operations.
 */
export interface ChildBackfillerDeps {
    client: OpenCodeClient;
    childWriter: ChildWriter;
}
/**
 * Handles backfilling turns and lastMessage from OpenCode SDK messages
 * when a child session completes.
 *
 * This is a pure utility class with no mutable state — safe to share
 * across concurrent child session completions (up to 10 parallel children).
 */
export declare class ChildBackfiller {
    private client;
    private childWriter;
    constructor(deps: ChildBackfillerDeps);
    /**
     * Backfills turns from SDK messages for a completed child session.
     *
     * Called from session.idle, session.deleted, and session.error handlers
     * when the completed session is a child (has parentID). The backfill is
     * fire-and-forget — errors are logged, never thrown.
     *
     * @param parentID - The parent session ID.
     * @param childSessionID - The completed child session ID.
     */
    backfillChildTurnsFromSdk(parentID: string, childSessionID: string): Promise<void>;
    /**
     * Extracts the role from an SDK message object.
     * Handles both `{ info: { role } }` and `{ role }` shapes.
     */
    messageRole(message: unknown): string | undefined;
    /**
     * Extracts text content from an SDK message's parts array.
     * Handles text parts, thinking parts (optional), and tool-only fallback.
     */
    extractTextFromSdkMessage(message: unknown, includeThinking?: boolean): string | undefined;
}
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