/**
 * Brainstorm session tool.
 *
 * The parent LLM drives the brainstorm lifecycle (UNDERSTAND → CONFIRM →
 * scan gate → DISCUSS) through conversation, but the hard-lock state must
 * live in state.json — not in chat memory. This tool is the LLM-callable
 * bridge to the state helpers in core/state.ts:
 *
 *   - confirm-understanding: releases the hard lock after the user confirms
 *     the parent's one-paragraph understanding (records the mission type).
 *   - set-scans: persists the scan kinds picked at the scan-plan gate.
 *   - upsert-question: records one DISCUSS-loop question state change.
 *
 * All writes run inside withFileMutationQueue (tools execute in parallel in
 * pi) and withRunLock (cross-session exclusion, per the saveState contract).
 */
import { type ExtensionAPI } from "@earendil-works/pi-coding-agent";
export declare function registerBrainstormSessionTool(pi: ExtensionAPI): void;