Altitude docs

A method for writing and polishing documentation so every page reads like it was written by one careful author: it opens at the right height, descends from plain-language orientation to concrete detail in order, hands the reader on cleanly, and reaches for a component only when the component earns its place.

The core idea is altitude: a controlled descent through fixed bands, from "why this exists" down to "the exact edge case". Each kind of page is allowed a different range — a tutorial stays high, a reference page sits low.

This skill governs how a page is built, not what is true. Every API name, symbol and behavior is verified against the current repository — see the accuracy rules in references/contracts.md.

Two modes: