/**
 * SandboxStrategy — port interface for isolated agent execution environments.
 *
 * Three implementations, selected by task config with automatic fallback:
 *
 * - DockerSandboxStrategy — full isolation via Docker containers
 * - TempDirSandboxStrategy — lightweight fallback using OS temp directories
 * - GitWorktreeSandboxStrategy — uses `git worktree` for repo-based tasks
 *
 * Selection: task config specifies preferred strategy; runtime falls back
 * Docker → TempDir if Docker is unavailable. CI environments prefer Docker.
 *
 * @see docs/archive/exec-plans/architecture-overhaul/phase-4-agent-harness.md
 */
export {};
