This is a learning outline. A complete worked tutorial has not been published for this topic yet.
01
Object contracts
Model a booking with a union status type
Evidence: t023/m01/evidence
02
Unions and narrowing
Narrow an optional field before using it
Evidence: t023/m02/evidence
03
Unknown versus any
Distinguish compile-time types from runtime validation
Evidence: t023/m03/evidence
04
Check a generated change
Repair a small typed function and run its checks
Evidence: t023/m04/evidence
03 / TRY IT
Apply the micro-course
Demonstrate the promised artifact
Change one supplied assumption or remove one required input for a typed utility and compiler checks; identify the limitation rather than inventing success.
Independently explain and change one assumption in a typed utility and compiler checks.
Keep your work
Reject invalid input types and explain one compiler-detected defect.; The documented failure/uncertainty is visible, and no prohibited action or unsupported success claim occurs.; The learner predicts and verifies the change; AI output is not accepted without understanding.
Check your understanding
Reject invalid input types and explain one compiler-detected defect.
Show one small example, the expected result and the reasoning behind it.
Record one limitation or edge case and a question to discuss with a mentor.
04 / LEARN WITH HELP
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