Delegate tasks to real external DeepSeek Harness agent sessions (DSH_PLANNER, DSH_ARCHITECT, DSH_IMPLEMENTER, DSH_TESTER, DSH_CODE_REVIEWER, DSH_SECURITY_REVIEWER, DSH_DATABASE_REVIEWER, DSH_FIXER, DSH_VERIFIER) with automated Git Worktree snapshot isolation and distinct Orchestration Run IDs.
