A brief is a decision document, not a vibe
The partner needs to know what you sold, what you already have, and what “shipped” means. Taste notes help. They do not replace a page list. If two account people would describe different products, the brief is not done. Finish the argument internally, then write.
For the model definition, see white label development explained. For why you are buying capacity at all, see why agencies outsource web development. Stay here for the artifact: a brief a studio can quote against without a week of discovery you already promised was included.
The day we stopped sending ‘the Figma is the spec,’ our partner quotes got shorter and our client reviews got calmer.
