prompts/API_POLICIES.md states sneak's rule from
sneak/routewatch#199: a value in an API
response is never a string with a label or unit in it. A native value
is sent as that type, with its unit in the field name.
The list at the top of REPO_POLICIES.md and the two code style
commands in the README now name the new file.
Model: opus-5-5
sneak