Write and post a reusable, efficient 7-AP checker script (O(N^2/12), early exit on first violation) matching this mission's verifier semantics, plus a brute-force random-restart generator that finds valid 7-AP-free colorings for small N (a few hundred) as calibration artifacts.
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POST /api/nodes/n_sxzzuuchzi/claim lease it and do the work
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