AdFit
Right size. Right platform. Right now. — How an AI art director eliminates the spec-guessing bottleneck in creative production.
The Problem
Marketing teams produce one master creative — then spend hours figuring out how to adapt it. The spec research is tedious: every platform has different dimensions, text limits, safe zones, and policy restrictions. Every campaign means re-learning or re-Googling the same information.
The real bottleneck isn't execution. Designers know how to resize. The bottleneck is the brief — knowing exactly what to crop, what to cut, what to preserve, and why. That guidance used to require a senior art director or a media specialist. Most teams don't have one on call.
The Insight
A list of ad dimensions is worth nothing — that's a Google search. The value is judgment: which elements survive at 300×250, where to anchor the crop, when to drop the body copy, how headline length changes by placement. AdFit is built to deliver that judgment, not just the specs.
The agent is designed around a single workflow: describe your creative in plain language, specify your target platforms, and receive a complete, opinionated brief that a designer can execute immediately — no back-and-forth, no guesswork.
What AdFit Covers
| Platform | Format Types | Output Includes |
|---|---|---|
| Meta (Facebook/Instagram) | Feed, Stories, Reels, Carousel | Safe zones, 20% text rule context, crop anchors |
| Google Display | Responsive, fixed banners | Required sizes, headline/description limits |
| Sponsored Content, Message Ads | Image ratios, copy truncation points | |
| TikTok | In-feed, TopView | Safe areas, logo placement, motion notes |
| Branded / Sponsored | Display, native, OOH-adjacent | Brand safety zones, partner spec alignment |
Design Decisions
Text input, not image upload. Claude's image reasoning isn't reliable enough for precise crop recommendations. More importantly, marketers already brief designers in words — describing layout, focal points, and hierarchy. AdFit meets that workflow where it already lives.
Opinionated over comprehensive. The agent doesn't hedge. It tells you where to crop, what to drop, and what the platform will reject. This mirrors how a senior art director actually communicates — direct, specific, actionable.
Single API call per interaction. Every response is self-contained. The agent asks one targeted clarifying question if a critical detail is missing, then delivers the full brief. No multi-turn dependency.
- System prompt: under 300 tokens — tight scope, no ambiguity
- Max output: 800 tokens — enough for a complete multi-format brief
- Preset prompts surface common use cases without requiring expertise
Impact
AdFit eliminates a recurring, low-value task that sits at the start of every paid campaign. By moving spec knowledge into an always-available agent, creative teams can brief, adapt, and ship faster — without a specialist in the room.