3rd Row List Names
The WhatsApp Business chat list shows two rows per conversation: contact name and last message. For businesses using Lists to organize their customers, there was no way to see how a conversation was categorized without opening it. Adding a third row with list names solves that — and gave the team a vehicle to define inbox principles at the platform level.
Problem
Lists organize the inbox. The inbox didn't show the lists.
Lists are the primary tool small and medium businesses use to make sense of their WhatsApp inbox at scale. They drive 95% of CTWA signals on the platform. Yet the chat list — the surface a business spends most of its time in — kept Lists invisible until a conversation was opened. The information was structurally present and visually absent.
The fix is small in scope and large in implication: a third row beneath the contact name and last message, surfacing how each conversation is categorized. The project worked through the cross-platform constraints that come with a small change to a high-density surface — profile-picture sizing, text truncation, visual hierarchy with the existing rows — and produced detailed design specs for Android and iOS.
Build the artifact at fidelity before approving the spec.
A working prototype was built using vibe coding — designing directly to code via AI rather than producing a Figma frame and waiting for engineering capacity. The prototype made it possible to test density, scroll behavior, and at-a-glance legibility against real conversational content before locking specs. It was highlighted by Christian Palino as one of eight standout AI-driven design prototypes across WA Business CD, described as showing "a level of fidelity and intentionality that is a hallmark of our superpower as designers."
From a feature to a platform principle
The work fed directly into a broader effort — Inbox Surface Principles — which was reviewed and aligned at WALT (WA leadership team). What started as a third-row change became a vehicle for defining what should be visible in the WhatsApp Business inbox, how information should be prioritized, and how the inbox should evolve. A focused feature, used to articulate a platform-level standard.