feat: hand-written lessons 13-25 with topic-bound practice - #17

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feat/rewrite-lessons-13-25

Jul 28, 2026

Commits on Jul 28, 2026

feat: hand-written lessons 13-25 with topic-bound practice

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fix: content review — dedicated error card L18, plausible distractors L16, zip-tuple link L24

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fix: tighten unpacking source check to target function and add L24 error card

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