CR: /drill Skill — Verification

~/.claude/skills/drill/ directory does not exist

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No existing /drill skill registered

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~/.claude/skills/drill/SKILL.md exists with valid frontmatter

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/drill invocation presents a random challenge

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/drill awk presents an awk-specific challenge

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/drill sed beginner presents a beginner sed challenge

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Answer grading provides constructive feedback

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All 6 tools represented in drill corpus (awk, sed, grep, find, xargs, jq)

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All 3 difficulty levels represented (beginner, intermediate, advanced)

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60 total drills available (10 per tool)

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