A new client sent me their brand guidelines last week with a one-line email: for context. One hundred and eighteen pages. The file was named Brandbook_FINAL_v4_UPDATED. I read the whole thing on a Tuesday night with Barnaby standing on the keyboard, and somewhere around page forty I could have told you which agency made it, what the internal fight was, and who won.
Page nine had a rule about never placing the wordmark over photography. Not a preference, not a caution. A rule, bolded, illustrated with a red X. Somebody lost an argument about a hero image in 2015 and got it written into scripture so it could never happen to them again.
That is what most guideline documents are. Not instructions. Minutes.
A brand guidelines PDF is a record of decisions made by one team, written in the grammar of permanent law, and handed to a team that was not in the room and has no idea what the argument was about.
The math on this is not complicated. The marketing director who commissioned the work is usually gone within two years. The agency that built it has rotated its own staff twice. The people left holding the document inherited every conclusion and none of the reasoning, which means the rules read as arbitrary, because to them they are. Nobody follows a rule they cannot reconstruct. They work around it, quietly, in a deck due Thursday, and eighteen months later the brand has a second unofficial system that lives in a shared Google Drive folder and actually gets used.
So write for the successor, not the signatory. Three things I now insist on. One, every rule gets a because. The wordmark stays off photography because legibility testing failed at small sizes, not because Kevin hated a photo. Two, mark what is fixed and what is open. A system that pretends all hundred and eighteen pages carry equal weight teaches people to ignore all of them equally. Three, the document has an owner with a name and a calendar reminder, or it is furniture.
The best version of this I have seen is not a PDF at all. Mailchimp put its content style guide on the open web and it reads like a person explaining choices to a colleague. Not a monument. A working document that assumes somebody new will arrive and need to understand why.
Somebody lost an argument about a hero image in 2015 and got it written into scripture so it could never happen to them again.
I printed the client's hundred and eighteen pages, because I still read better on paper, and Truffles was asleep on the stack within an hour. She was there all evening. It is the most engagement that document has gotten in three years, and I intend to say so in the readout.