export type LauncherPinKind = "dual-layout" | "v3-only";
export type LayoutCompatibility = {
    schemaVersion: 1;
    journalSlug: string;
    pinKind: LauncherPinKind;
    rollbackSafe: boolean;
    compatible: boolean;
    selectedRunner: "dual-layout-serialized-bridge" | "v3-only";
    reason: "rollback-safe" | "rollback-unsafe-area-layout" | "legacy-layout";
};
/**
 * A launcher must call this before selecting a v3-only pin. The bridge is
 * always safe to start: it reads the committed layout state and can compose
 * back, whereas a v3-only binary can strand the latest area mutation.
 */
export declare function resolveLayoutCompatibility(rootDir: string, journalSlug: string, pinKind: LauncherPinKind): LayoutCompatibility;
//# sourceMappingURL=layout-compatibility.d.ts.map