docs(readme): the headline command is example OUTPUT, and the saving needs a budget, routing, skills

The install block sits directly above the 5.0% figure, so the page read as "run --for, get 5%".
It does not. An unbudgeted --for returns a rich terminal bundle by design -- right when it ends the
question, wasteful when it does not -- and running it on every question is the most expensive way to
use this tool.

Names the three things that actually produce the saving: --token-budget / --top-k to cap the bundle,
--help-task to route (it abstains, and "just grep for it" is a correct answer it will give), and the
skills, without which an agent has 175 flags and no map of which moment each is for.

Also marks the claim boundary: the published figures are single-agent. That the saving grows with the
number of cold orientations follows from the fixed-cost mechanism but is pre-registered and unrun, so
the page says so instead of implying a measurement that does not exist.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>