Write the calibrated leans from a voice round into the FOUNDER'S OWN voice profile, the personal register. It can never touch the brand register: the brand voice came from the website, is what pages and listings are written in, and this endpoint takes no parameter that could point at it. Scope 'act'; free, unmetered, every plan. Merges per axis, so an axis you do not send keeps what it had and the descriptive voice fields (tone, characteristic phrases, vocabulary, sentence style, avoid) are untouched. A personal profile the founder has pinned is left as it is and reported as already recorded. An unknown axis id is refused rather than ignored, because a lean silently dropped is a calibration lost. Bounded to a fixed number of writes per product run per day, claimed atomically before the write.