Agents made coding fast
Agents made coding fast. Understanding didn't keep up. An agent writes the change. Your name goes on it. You didn't write a line. You could let that slide. Plenty do. But the best builders don't want to code less. They want to understand more. So we created Code Trails. A Code Trail is a self-contained path through your code, with all the context you need to understand it, in one link. It's Frame.io, for code. Four views open at once. Plain English for what it does. A sequence for how it moves. A map for where it lives. The code, right there when you want it. Open it in any browser, nothing to clone, nothing to install. You make a Trail the moment one mind isn't enough. When you're stuck. When a decision needs context you don't have. When you're just not sure the agent got it right. The person who actually knows opens the link, drops a note on the exact line that matters, and gets back to their day. Two minutes, not a meeting. Their judgment stays in the trail, so the next person who hits that same wall isn't starting from zero. Trails aren't extra work. You build one by doing the thing you were already doing. One link at a time, understanding stops living in a single head. The expert isn't the bottleneck anymore. What one person figure out, the whole team has. The work gets better because more than one mind touched it, and nobody had to book a meeting to make that happen. Behind it: three founders who kept circling the same problem. Fernando Ramirez built distributed systems at Google and Airbnb. Julie Allen spent a decade at Cisco translating what systems do into something people can understand, with a few patents to show for it. Michael Flannery is a three-time founder who knows how to build a business. Code Trails is the first product from Principal AI, and the way into the Principal ADE: an agentic development environment where trails connect to a live map of your codebase, your team's activity, and the agents you already work with.