Validation as a Pipeline Gate

Day 44 of 100 Days of MLOps. Validation you can run is good; validation that always runs is what protects you. Wire a schema check into your pipeline as a hard gate — before any training, the data is validated, and if it fails, the pipeline stops with a clear error instead of training on garbage. Fail fast, so a poisoned batch can never silently reach your model. Runs 100% locally on any OS.