Hey HN,Thijs here! I m the founder of Prototyper and today we re launching the first visual canvas built for agents.Couple of interesting lessons from building the product that I think are worth sharing:For the agents, everything is a file. In Prototyper, everything from plans, to apps, and diagrams, can be read as a file.We found that a filesystem is the most natural way for an agent to navigate: it discovers new content and functionality just by traversing the tree.We kept this layer deliberately thin and unopinionated, because it s the substrate, not the experience. It s the foundation that makes everything work on top.It essentially operates as a distributed, web-based unix kernel.Because of that it s built for the agents you already use. People run all kinds of models and harnesses, often several at once.With this architecture, we don t try to lock you into one, it s built to work with any agent that you like. That means that any agent can read from and write to your workspace.It s fast. File writes land in under a millisecond. That s not a bogus metric, it s what makes the whole thing feel seamless and like a real extension of your thinking. Thanks to our custom unix kernel.Visual first. Every file in your workspace can be opened on the canvas. Whether you re an engineer working on a new frontend or a PM building a product roadmap.It s a real visual workspace for the actual work, not a description of it. As said, it s not a blank canvas with a box of primitives: the canvas represents a real unix system, which is the kind of purpose-built, opinionated experience that makes a product.In essence, the substrate is generic so the things you build on it don t have to be.What s most interesting is that by this architecture we found that we can decouple system prompt length from agent capability.I m happy to get feedback from the community and see what you all think of it :).