Route tests for q=banana, q=0, q=101, an empty q= and q=&q=500: each
must be a 400 whose error names q and the value. Route tests for q=80%
and q=50;fit=contain, whose query string cannot be decoded: each must be
a 400 whose error shows it. They fail on next, where each is served at
the default quality 85.
Model: opus-5-5
sneak
8b001da0a6