import type { ToolResultSummary } from "./success-detector.js";
export interface SessionState {
    setAnchorIds(ids: readonly string[]): void;
    getAnchorIds(): readonly string[];
    clearAnchorIds(): void;
    recordToolResult(result: ToolResultSummary): void;
    getRecentToolResults(): readonly ToolResultSummary[];
}
export interface SessionStateOptions {
    ringSize?: number;
}
/**
 * Create a fresh session state tracker. All state is in-process; the
 * lifetime matches the extension instance that the hook factories close
 * over (typically the duration of a single pi session).
 */
export declare function createSessionState(options?: SessionStateOptions): SessionState;
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