Julien Genestoux

@ouvre-boite.com

VP of Engineering at @relayProtocol! Previously, founder @unlock-protocol.com (aqui-hired by Relay in 2025), founder @superfeedr (RSS, websub), sold to @medium.com in 2016! Also goes by julien51 on the Internet! https://ouvre-boite.com

There are 2 kind of tests: 1. The "scaffolding tests" you create when you write a new feature. 2. The regression tests to make sure that thing won't break in the future.

One of my favorite side effects of AI is that it's making the web much more open again. For over a decade we've seen platforms increasingly become walled gardens. AI has created pressure for interoperability and we're finally seeing open standards and APIs being embraced again.

Next big thing for Leaflet: helping creators monetize! 💸 First step = paid memberships for your publications Next, exploring other things like one-off payments — tell us what you need! Almost ready & we'd love to find some early partners, please fill out the linked form if you're interested!

Piloting paid memberships for the open social web!

Lab Notes 035: building monetization features for Leaflet creators, starting with paid memberships — tell us if you'd like to be the first to try, and what else you need!

lab.leaflet.pub

I don't care about Fauci. The facts are: the US did worse than most OECD countries when it comes to health outcomes AND it also did better economically than these same countries. So the argument that the US went too far to protect lives at the expense of economic activity is pretty weak.

The best maturity signal I found in engineers is whether they only start coding/fixing/refactoring once they actually have a very very good understanding of the problem. My team is working on a latency issue and it's fascinating to see some jump to "I will change X" vs. "I will measure Y"

One thing that resonates with me a lot about global warming is that this year (or last) may the be hottest year on record so far, but it is also very likely the coldest of the next few ones. The (dis)symmetry is really what makes it obvious that we're going to face a lot of pain.

An interesting thing about agents vs other enterprise software is that most companies actually want to use 2 (or more) concurrently. In some strange way, in our org Codex and Claude are not competing. The more we use one, the more we use the the other one as well.

Until a few months ago, Iran only had a single card to play and that could only play it once: nuclear weapons. They now also can disrupt international fossil fuel markets at any point and put many countries in their knees, economically.