About this build

Critical constraints satisfied

No static workout database and no exercise catalog.
Workouts and exercise media are generated at runtime via AI.
Only ephemeral session memory is used to avoid repeating recent muscle groups.
Last-used settings stored in browser localStorage, not a database.

AI provider swapping

The backend uses an AIProvider interface. Switch providers by setting AI_PROVIDER. If Azure OpenAI image generation is not configured, the app generates animated SVG previews dynamically.

Production note: for image/video generation at scale, use transient blob caching with short TTL and signed URLs.