/**
 * Kernel Execution — contracts.
 *
 * KernelExecutionService is the public interface for anything that wants
 * to change the repo on behalf of a caller. CLI / MCP / orchestrator go
 * through this. Phantom/SubAgentRuntime implement the RuntimeBackend
 * interface; KernelExecutionService depends on RuntimeBackend, not on
 * any Phantom class directly (PR 3 contract).
 */
export {};
