Every production regathers the same information. The caterer's number. Which car park the crew can use. The exact hex value of the secondary brand colour. The name of the location manager at the warehouse you shot at last spring.
Someone knows all of it. Usually one person, usually in their email, and the cost only becomes visible when they're on holiday or they leave.
A brand library is the fix, and it's less about tooling than about a maintenance rule.
The four things worth keeping
Resist the urge to build a comprehensive archive. Four categories carry almost all the value.
Contacts
Every person a production might need. Crew you'd rehire, freelancers, the location manager, catering, equipment hire, the drone operator with the right certification, the person at head office who approves overtime.
Per entry: name, role, phone, email, when you last worked with them, and one line of honest assessment. That last field is the whole point. "Excellent on documentary, struggles with tight scripts" is worth more than the phone number, and it's the thing that lives only in someone's head.
Locations
Everywhere you've shot or scouted. Address, access notes, who to contact, parking, power, whether there's a permit process, sound problems, when the light is good, and what it cost.
Location scouting is one of the largest hidden costs in production and it's almost entirely repeatable. A location you rejected is worth keeping too, with the reason — otherwise you'll scout it again in eighteen months.
Props and gear
What you own, what you've hired, and where it is. Brand-owned physical assets have a way of becoming untraceable between shoots.
For hired items, keep the supplier and the price. Rate memory is unreliable, and quotes are easier to check when you know what it was last time.
Palette and visual constants
Hex values, fonts, logo files and their clear-space rules, lower-third templates, the approved music library.
This is the one that produces the most rework when it's missing. An editor guessing at a brand colour produces a piece that's subtly wrong and expensive to fix at the end.
What doesn't belong
Finished content. That's an asset library — different thing, different problem.
Anything one person can hold. If it's genuinely trivial and stable, a library entry is overhead.
Strategy documents. They belong with the brief, not with the production kit.
Anything you can't keep current. This is the real filter, and it's the next section.
The maintenance rule
Brand libraries fail for one reason: they go stale, someone gets burned by a wrong phone number, and everyone stops trusting it. After that it's dead — a stale library is worse than none, because it looks authoritative.
The rule that works is update at wrap, not at some later review.
At the end of every shoot, before anyone goes home, someone spends fifteen minutes updating: new contacts added, rates corrected, location notes amended, the honest one-line assessments refreshed.
That's it. No quarterly audit, no owner nominated in a meeting who then forgets. Attached to an event that already happens, done by whoever ran the day.
Two things worth recording that people don't
What went wrong. The location where the neighbours ran a leaf blower every afternoon. The supplier who delivered late twice. Institutional memory of failure is the most valuable and least recorded thing in production.
What it cost. Rates drift and memory is optimistic. A price history per supplier makes the next quote checkable, and makes judging whether a rate is fair something other than a feeling.
Structure it flat
The temptation is to build a taxonomy. Don't.
Four flat lists with good search beat a nested folder structure nobody remembers the shape of. The test isn't whether it's elegantly organised — it's whether someone who didn't build it can find a phone number in thirty seconds while standing in a car park.
Practical minimums: one entry per real thing, no duplicates, a last-updated date on everything, and searchable free text rather than rigid fields for the notes.
Where Acumin fits
The Brand Library holds exactly these four kinds — contacts, locations, props and palette swatches — as reusable collections, and they import into the production documents rather than being retyped. Build the contact once; it appears on the call sheet.
That import is the part that makes maintenance pay. A library that only feeds a document you'd have written anyway is admin; a library that removes the retyping gets updated, because updating it saves the person doing it time on the next job.
It sits alongside the other half of the reusable set — brand voice for how you sound, the library for what you shoot with.
How to use this today
Take your last three productions and list every phone number, address and hex value someone had to look up or ask for.
That list is your library's first version, and it's probably shorter than you'd expect. Put it somewhere shared before the person who knows it takes leave.
Related: The anatomy of a call sheet is where most of this ends up on the day. Documenting your brand voice is the same idea applied to how you sound rather than how you shoot.