Interview protocol (fixed before running): interviewer = our reimplementation of "Grill Me" (see outputs/harness/c_grill.py prompt), max 10 questions, one question per turn. Control = single open question "Tell me about yourself and your work" then write about-me.md. Coverage = number of F1..F10 regexes matching the final about-me.md. Invention check = LLM judge counts claims in about-me.md absent from persona file.