Round 6 — Claude repository review of v7

Independently re-derived the attainability numbers, contributed eleven adopted recommendations — including retitling “incentive-response” to “treatment-response” — and produced the archive's most instructive reviewer error: initially concluding two Explore Science figure issues were fabricated because the wrong branch was inspected. The retraction created a permanent process rule: every review request pins repository, commit, PDF SHA-256, page count, and build run.