Advise on whether and how to version FastAPI endpoints when a request/response shape needs to change without breaking the existing frontend mid-development — relevant mainly if a breaking schema change is needed after the frontend already depends on the old shape. Use when the user is about to change an existing endpoint's request/response structure and asks whether that needs versioning, or asks about API evolution strategy. For this project's current stage (single frontend, same team, pre-launch), full API versioning infrastructure is almost certainly overkill — this skill's main job is often to say so.
