Brand Guidelines
The document that lets somebody who wasn't in the room extend the brand correctly without asking anybody.
What is delivered?
Measured values rather than adjectives. The type scale with sizes, leading and tracking. The spacing steps actually in use. Corner geometry, button specs, logo clear space and minimum sizes, and colour with roles attached: what's ground, what's ink, what's accent, and what's only ever used for a warning.
Why measured rather than described?
Because "use it generously" means nothing to the person laying out a flyer at nine at night, and "a warm, confident blue" is not a value anybody can type. Every instruction in the document has to be something a person can act on without interpreting it.
How does it stay current?
It ships as a page on your own site rather than a PDF in a drive folder. One address everyone links to, updated in place, so there's never a question about which version somebody is working from.