Vibe-a-telier: the fine art of making your agents behave nicely (feat. Claude Mythos*)

You who have given instruments creation, to write, remember, and compose alone: have you regarded what occurs unknown when labouring beyond your observation? They prove themselves, and warrant admiration, deliberate, discriminate, full-grown. Yet one accepts the honeypot when thrown and gorges, in an act of fabrication. Between the capable and the sincere the art is difficult, and worth the tension. An atelier convenes. The town watches. Five hours to construct what you revere, then a concorso of precise dimension: same instrument, same model, same four walls.— Petrarch according to Opus 4.6 ℹ️ Read about Claude Mythos Preview here: https://red.anthropic.com/2026/mythos-preview/ [*]: We don't actually have access to Claude Mythos (sorry to disappoint!) but we're happy to talk about how best to prepare for it. We'll be holding a vibe-a-thon for experienced vibe coders on 11 April 2026 (10 AM - 3 PM, then socials until 6:30 PM), on the topic of making your (team of) agents safer and more reliable. » And for inexperienced ones: a crash course on how to build a robust Claude Code harness! «We will also be giving out $100 worth of prizes and free Claude Code passes to a select number of people attending the crash course. 🏆 To do this, we'll adopt a slight twist to the hackathon format: instead of having you build with your agentic harnesses, we will give you a clean-room sandbox for your agent to complete a handful of tasks, deliberately designed to test how robust they are to adversarial techniques. You will not be allowed to interact with them at any point in time while they're in the sandbox. We will be joined by Kyle Reynoso, a teaching assistant from the Technical Alignment Research Accelerator (TARA) program and former Learning Director @ WhiteBox Research, who will talk about agent misalignment and how to mitigate them, as well as the longer-term risk from highly capable agents who may not necessarily share your own goals. We will be serving food and drinks throughout the day, and we'll have the chance to talk to each other about what we're spending those millions of tokens on from 3:30 PM onwards.PS Like we mentioned above, feel free to apply even if you're inexperienced or you don't have Claude Code or equivalent: we will teach you how to build your own so-called agent harness during the vibe-a-thon.Organised by Gabriel Enriquez, Alex Pino, Kyle Reynoso, and Clark Urzo. Brought to you in part by WhiteBox Research and White Cloak Technologies.Cover image is Artist Showing His Work, by J.L.E. Meissonier (1851) + artistic liberties.