

Ryan Johnson
4.9K posts

@ryanmjohnson
Builder and resident @culdesac. Was founding team @opendoor, @baincapital, @mta. Dm for ebike recs







I spent 24 hours inside America's newest car-free neighborhood, with the man who designed it. @ryanmjohnson It made me realize how broken everywhere else actually is – and how American cities are about to change forever. What I learned is that autonomous cars will reduce the need for the majority of parking. When you remove parking lots and garages from a neighborhood, you free up an enormous amount of land. That land can become courtyards, gardens, restaurants, and shops all within walking distance of every front door. The company that made this town, Culdesac built an entire neighborhood in Tempe, Arizona on this idea. And the result is something that could be the blueprint for how we design our neighborhoods once AVs become fully adopted. The insight is simple: parking doesn't just take up space, it kills the energy of a place. Remove it and you get density, walkability, and community back. Now they're scaling it. More cities, more neighborhoods, a different vision for how Americans live. Most people think walkable cities are a European thing — too old, too dense, impossible to replicate here. Culdesac is proving that's wrong, one neighborhood at a time and giving us insight into how we can develop neighborhoods for AV age. @culdesac


I made a universal company brain. - connect to ANY agent natively - Git-like versioning and RBAC permissioning - connectors to all sync tools of companies - Dreams about your company - run on-prem. Free to start. it's live today. we've been using it for 6 months @supermemory


It’s never been easier to design your dream house. Draw a shape. Define your rooms. Set your constraints. @DraftedAI generates complete floor plans, elevations, and 3D home designs in seconds. Over the last month, 120,000 people generated 325,000+ home designs with Drafted.ai.

What many people discussing this fail to realise is that the Netherlands is one of the best places in the world to cycle and to drive a car.

Today, I’m launching my newco, NavigateAI. We are short hundreds of thousands of skilled workers and we're on a mission to give every field worker an AI copilot, so they can build faster and better when we need it most. navigate.ai/blog/2026-05-2…

Today, we share a breakthrough on the planar unit distance problem, a famous open question first posed by Paul Erdős in 1946. For nearly 80 years, mathematicians believed the best possible solutions looked roughly like square grids. An OpenAI model has now disproved that belief, discovering an entirely new family of constructions that performs better. This marks the first time AI has autonomously solved a prominent open problem central to a field of mathematics.











I can’t imagine there’s a button in existence that does less than this. Maybe the close door button on an elevator?



If you design/remodel a home too idiosyncratically to your own tastes It will be extremely challenging to sell later on, even in the blazing hot San Francisco real estate market of 2026