export interface ActiveRootStore {
    /** The scan root all route handlers should use, resolved per request. */
    getRoot(): string;
    /** Replace the active scan root (e.g. after a project switch). */
    setRoot(root: string): void;
    /**
     * Re-derive the active root from `~/.vskill/workspace.json`'s active project.
     * Updates the store and returns the new value; if no active project resolves,
     * the current root is kept and returned.
     */
    reload(workspaceDir: string): string;
}
/**
 * Resolve the active project's path from the workspace registry. Returns null
 * when there is no workspace, no active project, or the active id is dangling.
 * Shared by both boot resolution (eval-server) and runtime reloads (this store).
 */
export declare function resolveActiveRoot(workspaceDir: string): string | null;
export declare function createActiveRootStore(initialRoot: string): ActiveRootStore;