A written brief records what a client believed before anyone made them choose. A kickoff is where the choosing happens.
Briefs arrive agreed and vague, because agreement is easiest when nothing is specific. Every sentence everyone signed off is a sentence that avoided a trade-off, and the trade-off arrives later anyway, usually in a review.
Force the trade-off early
We run a half day with the decision-makers in one room and a short list of either-or questions. Recognisable or distinctive. One room or a chain. Priced against the market or above it.
Nobody leaves with every answer, but the disagreements surface while they are still cheap.
Every sentence everyone agreed on is a trade-off somebody postponed.
Get the decision-maker in the room
A kickoff without the person who can approve the work is a workshop about a workshop. We say so before booking it, and we would rather move the date than run it without them.
Half the value is watching where that person hesitates.
Leave with one page
The output is a single page: what we are making, what it must survive, what we agreed not to do, and who decides. It is circulated the same day and it replaces the brief.
When a review drifts, that page ends the drift in a sentence.