Own Voice Rewrite (Student-Voice Rewrite)

Rewrite a homework draft in the student's own voice. Two calibration paths: if a real writing sample from the student is available, extract distributional voice features (sentence-length band, punctuation rhythm, connective preferences) and a negative-constraint list; otherwise fall back to grade-level calibration (primary / middle / high-school vocabulary, sentence-length caps) and declare it as a proxy. Then force-inject the student's real materials in place of generic filler, add restrained human touches, re-audit with ai-trace-auditor, and deliver with a read-through-before-submitting reminder plus an append-only calibration record. The human-warmth core of the homewo…