Captain's-log entry for the Fred pack and La Cale. The keeper: nobody wrote "prefer
silence" anywhere. It fell out of five reasonable measures, each correctly
implemented, none of which had an opinion about whether there was any audio in the
file. A composite score is a specification of what you want, and every term you
weight lightly is a loophole.

Second keeper, the one that will save a future session: three tests today went green
while proving nothing, and each fake test hid a real question. The finder test used
the stem's own beat grid — which finds no beats inside silence, so no window was ever
generated there and it passed with the fix disabled. The niceness test looked its
hook up in the wrong scope, got None, and fell back to a no-op lambda. Break the fix,
watch the test fail, put the fix back.