/**
 * Wire protocol between the relay server and the Chrome extension. Ported
 * verbatim from oh-my-pi `relay/protocol.ts`. The extension dials out to
 * `ws://127.0.0.1:<port>/ext`; the relay drives the extension with numbered
 * RPCs, and the extension pushes tab lifecycle + `chrome.debugger` events.
 */
export interface TabSnapshot {
    tabId: number;
    url: string;
    title: string;
    active: boolean;
    windowId: number;
    /** Pinned tabs are never grouped (Chrome would silently unpin them). */
    pinned: boolean;
    /** Chrome tab group id; -1 when ungrouped. */
    groupId: number;
}
/** RPCs the relay may ask the extension to perform. */
export type RelayRpcRequest = {
    op: "attach";
    tabId: number;
} | {
    op: "detach";
    tabId: number;
} | {
    op: "send";
    tabId: number;
    sessionId?: string;
    method: string;
    params?: Record<string, unknown>;
} | {
    op: "createTab";
    url: string;
} | {
    op: "removeTab";
    tabId: number;
} | {
    op: "activateTab";
    tabId: number;
} | {
    op: "group";
    tabIds: number[];
    title: string;
    color: string;
} | {
    op: "ungroup";
    tabIds: number[];
};
/** Messages sent relay → extension. */
export type RelayToExtMessage = ({
    t: "rpc";
    id: number;
} & RelayRpcRequest) | {
    t: "pong";
};
/** Messages sent extension → relay. */
export type ExtToRelayMessage = {
    t: "hello";
    userAgent: string;
    browserVersion: string;
    tabs: TabSnapshot[];
    /** Tabs that already have a `chrome.debugger` attachment (relay reconciles after a service-worker restart). */
    attachedTabIds: number[];
} | {
    t: "cdpEvent";
    tabId: number;
    sessionId?: string;
    method: string;
    params?: Record<string, unknown>;
} | {
    t: "detached";
    tabId: number;
    reason: string;
} | {
    t: "tabCreated";
    tab: TabSnapshot;
} | {
    t: "tabUpdated";
    tab: TabSnapshot;
} | {
    t: "tabRemoved";
    tabId: number;
} | {
    t: "rpcResult";
    id: number;
    ok: boolean;
    result?: unknown;
    error?: string;
} | {
    t: "ping";
};