An engagement prediction system taken from notebook to something operable, as four deployable FastAPI services: a leakage-safe feature pipeline, cost-aware model selection under a paired-bootstrap tie test, an operating point chosen against a traffic budget rather than by maximising F1, then model introspection and drift monitoring around it.
| # | Service | The question it answers | Tests |
|---|---|---|---|
| 01 | Single Prediction | Is the model right? | 43 |
| 02 | Batch Prediction | Does it hold up at volume? | 78 |
| 03 | Model Info | Is the artefact in memory the one that shipped? | 70 |
| 04 | Analytics Dashboard | Is it still healthy today? | 101 |