# Provider Interface

Providers live under `apps/api/app/providers`.

- `llm/base.py`: reasoning provider for GLM-5.2 or another OpenAI-compatible model.
- `vision/base.py`: visual grounding provider for GLM-5V-Turbo or another grounding-capable model.
- `ocr/base.py`: OCR provider for GLM-OCR or another structured OCR service.

Lenses depend on interfaces, not concrete providers. Test mode uses deterministic fakes and makes no external API calls.