
# Learning Method

Each skill must contain:

1. Concept and appropriate use.
2. Design reasoning and trade-offs.
3. Repeatable procedure.
4. Good examples with editable source.
5. Rejected examples with explicit diagnosis.
6. Nominal, boundary and invalid tests.
7. Reflection after failure.
8. Source provenance and licence.
9. Safety classification.
10. Certification evidence.

Finished STL files alone are weak learning material because they omit design intent, dimensions, construction history, parameter relationships, failures and validation.
