Tried to manage model parameters in YAML. Got sick of the nesting, quoting, and type juggling. Moved to Python files for everything. Each run config is just a dict: models, hyperparams, feature toggles, time windows. Executable, validated, and testable. Bonus: I can generate param sweeps programmatically instead of copy-pasting YAML blobs. Simple idea, massive quality of life upgrade. [[ML]] [[Serendipity]]