The brand brain

The brand brain is the structured record of your business that every concept, every ad, and every critic review resolves against. It is the reason Mag's work sounds like you rather than like an AI.

It holds things like: what you sell, who you sell it to and who you don't, your positioning, your voice, your pricing, your differentiators, words you must use, and words you must never use.

How it gets filled

Mag drafts most of it by reading your marketing site, then asks you to confirm. Roughly:

• Confirmed, not asked — company name, products, brand colors and fonts. Mag found them; you check them.
• Always confirmed — positioning, voice, and ideal customer. Mag infers these from your copy, and an inference you never corrected is a liability.
• Always asked outright — whether you're in a regulated category, whether Mag may use your face or voice, and any topics ads must never touch. These are not detectable and Mag will not guess them.

How it changes

A brand brain that never changes goes stale. Once a week Mag reads the brain against everything that has accumulated since the last pass — paid performance, site analytics, which of its proposals you accepted or rejected — and proposes edits:

Your ICP says 25–34, but the cohort actually engaging skews 35–44. Here's the suggested edit.

Mag never applies these itself. A proposed change arrives as something you approve or reject, and only on approval does the brain version bump. Mag can only propose edits to a restricted set of fields — positioning, value props, differentiators, word lists, and the pains and jobs-to-be-done of a customer segment. Anything structural is yours to author.

You can read the current brain at any time, in the app or through the MCP server.