# Codex Prompt — Pass 09 Detection Pipeline Interface

Implement object detection pipeline interface.

Follow:

- docs/DETECTION_PIPELINE_SPEC.md
- docs/DETECTION_CLASSES_CATALOG.md
- docs/MODEL_REGISTRY_SPEC.md
- docs/BUILD_TICKETS_M3.md T-011

Required:

- analysis run creation
- detection service interface
- model registry lookup
- deterministic fixture detector for test/demo mode
- detections persisted with class, confidence and geometry
- GeoJSON output
- frontend detection page can start run and view results

The interface must be compatible with later YOLO/Ultralytics implementation.