This week: Sunnyday Sandbox resume, Assistant; next Axle CLI?

On the Sunnyday side:

  • Agent sandboxes per session are fully resumable now, up to a maximum of 30 days. This sets up each agent up to take follow up commands, which will open up new avenues of interacting and correcting remote agents
  • Assistant is now in beta. You can now prototype, create, and update Agents using the Assistant. This is something I’ve been mulling on for a while; as much as I think the UI is remarkably intuitive, the blank screen problem is still tricky to design around. This provides a way to turn sketches into infrastructure builds really quickly.

Because the work was based on Axle (we shipped an update for this around the internal ontology — 0.29.0), and most of the work took advantage of features in Axle recently, it was quick to come together. For me, this sets up some further thinking around conversations as the primary UI that I’ve been mulling about, and I believe will make some of the deeper cutting features, such as self-serve custom evals, possible. AI Agents are very good at pulling existing snippets together.

I’ve been thinking about the next iteration of axle-cli. I’ve been building axle-code for fun on the side, and it has been illuminating to see what features require more work (harness) and what works “out of the box”. Spoiler alert: frontier AI models are coding models by default. I am going to need a more sophisticated CLI soon: it’s going to look a bit like Cowork but with the conveniences of task runners. More to come!

Posted Aug 09, 2026