Audit a text for AI-writing fingerprints: scan built-in Chinese/English AI high-frequency word lists, measure sentence-length variance (std/mean), list/parallelism density and structural cliches, then report a 0-100 score with per-finding locations as machine-parseable JSON. Use when the user asks to detect AI flavor / AI-trace detection / check whether this reads like AI wrote it / AI-rate check / audit AI traces / detect AI writing / scan for AI style / de-AI check. Do NOT use as an official AI detector for academic-integrity arbitration — heuristic self-check only.
