Working songwriters shape this product.
Reviews from working pros — verbatim quotes, mapped to shipped fixes. Sibling format to /case-studies (quantitative lyric pipeline). The discipline here is the format: hypothesis → before → what shipped in response → after → lessons. No marketing prose.
The first case study is in operator review. It tells the story of how a working Nashville songwriter's verbatim feedback shaped the product over two cycles. Listed here when the reviewer confirms named attribution.
Queue — coming soon
Slot 2 — different genre, different cycle
A working songwriter from a different niche (indie / CCM / pop) runs the same tour. Brett confirmed country / Americana; the next review balances the genre spread.
Slot 3 — international / multilingual
A non-US songwriter or a non-English-first reviewer puts the cross-language fairness work to the test. Pairs with the Phase C corpus expansion on the same timeline.