A JSON route to copy from: `GET /hello?name=…` answers `{"hello": "…"}` (`world` when the parameter is absent). Install it, then reference `hello-route` from yo

Two text helpers: `slugify` turns any title into a URL slug (lower-case, dashes, trimmed), `word-count` counts whitespace-separated words (0 for blank input). B

Two number helpers: `mean` of a list of `:values`, and `percent-of` — a `:part` as a percentage of a `:whole`, rounded to one decimal.