Best content brief generator for designers

There are roughly 40-60 general content brief generators on the market (tools like Copy.ai, Jasper, Claude, etc.), but almost none are purpose-built for designers specifically. The existing failures are predictable: they generate text-heavy briefs optimized for words-per-minute, they don't account for visual direction or mood references, they miss design-specific constraints like platform specs or brand asset requirements, and they treat 'brief' as a writing problem instead of a creative alignment problem. The real gap isn't in brief *generation*—it's in brief *translation for design*. A designer needs mood boards, color language, typography direction, competitor visual analysis, and accessibility constraints. Most current tools ignore this entirely. The actual opportunity is building a brief generator that starts with design-specific prompts (Who's your audience visually? What emotion should the design trigger? What's your visual competitor set?), then generates briefs that include reference imagery, design constraints, and success metrics that actually matter to shipper vibecoders. The winner here will integrate with design tools (Figma, Adobe XD) and spit out briefs that designers can action immediately—not 500 words of marketing fluff they need to translate into design language themselves.