Step 2 is the Blueprint, six tabs. The niche and the promise are the only two things nobody can look up for you; the rest is optional depth the AI reads whenever it is filled in. Your own measured numbers appear where they can guide a choice.
Tab 1. The niche in one line, and the promise: what a viewer gets from every video. AI: Suggest Promise drafts one from your channel description; edit it until it is true. Size and stage below are filled from YouTube.

Tabs 2 and 3: the three to five content pillars every video sits under, and who it is for. Each has a suggest button that reads what you already wrote. Keep them short; they are read by every generator later.

Tab 4. Videos per week, publish days, typical length and your Shorts strategy. The line under length is measured: here, under one minute performs best across 48 of this channel's settled videos, with See the working. Guardrails and the TAM calculator are tabs 5 and 6. Save Blueprint when done.

The Blueprint is written once and read everywhere, and where a choice can be measured, like typical length, the page shows your own channel's numbers next to the field instead of a generic rule.