What problem does it solve? Reading code or docs rarely proves you actually understand how a system works. This Skill tests your understanding of a concept as it is implemented in your own codebase, scores you against an 80% pass mark, and teaches only the concepts you missed. ## Core Features & Use Cases - Implementation-grounded questions: Reads the actual code first, building ten concept questions with five variations each and distractors drawn from rejected alternatives, superseded designs, and spec/code divergences. - Structured assessment: Asks ten multiple-choice questions in batches, scores at 80% to pass, and reports a card naming the misconception behind each wrong answer. - Targeted reteaching: Teaches each missed concept with file-and-line citations, then re-asks it from an unseen variation until you pass or exhaust all five angles. - Use Case: After reviewing a billing service's allocation logic, run the quiz on "signed allocations" to verify you can explain the invariants, locking, and failure modes before modifying that code. ## Quick Start Ask the AI to quiz me on how signed allocations work in this repository until I demonstrably understand it.