engine-onboarding

Onboard a new heterogeneous engine into the autopilot lifecycle. Use when: "onboard a new engine", "qualify gpt-X / a new model as a reviewer", "is model Y good enough", "add an implementer engine", "add a planner engine", "add a verifier engine", "evaluate a model as orchestrator", "route a model by role", "new model for review/dispatch", "新增一個引擎", "驗證某模型夠不夠格", "這個 model 能不能用", "加一個 reviewer/implementer/verifier/orchestrator 模型". Not for: writing new scorecard scripts, inventing new routing policies, or deciding model-family domain fit.