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Engine Folder

This folder contains the main application logic.

Files

• generation.py Generation backend selection and implementation. Includes the real Diffusers-backed generator, the test-only mock generator, image-size parsing, prepared-model resolution, and runtime diagnostics.

• orchestrator.py Coordinates experiment creation, session creation, round generation, feedback submission, replay export, lifecycle validation, and trace emission.

• __init__.py Package marker.

Key idea

The engine layer keeps route handlers thin. API endpoints call into the orchestrator instead of implementing lifecycle rules directly.