import type { ExtensionContext } from "@earendil-works/pi-coding-agent";
import type { SubagentBackend, SubagentProfileName } from "../types.js";
export declare const SUBAGENT_SESSION_KEY_CUSTOM_TYPE = "pi-flow-subagent-session-key";
export interface SessionKeyBinding {
    key: string;
    sessionId: string;
    profile: SubagentProfileName;
    backend: SubagentBackend;
}
export declare function normalizeSessionKey(value: string | undefined): string | undefined;
export declare function createSessionKey(): string;
export declare function getPersistedSessionKeyBinding(ctx: ExtensionContext, key: string): SessionKeyBinding | undefined;
export declare function persistSessionKeyBinding(ctx: ExtensionContext, binding: SessionKeyBinding): void;
export declare function assertBindingMatchesProfile(binding: SessionKeyBinding, params: {
    profile: SubagentProfileName;
    backend: SubagentBackend;
}): void;
export declare class SessionKeyLocks {
    private readonly tails;
    run<T>(key: string | undefined, task: () => Promise<T>, signal?: AbortSignal): Promise<T>;
}