The best builders don't want to code less.
They want to understand more.
File City
Your entire codebase, rendered as a living map. Watch it light up when something changes.
Principal Activity Feed
A live stream of how software evolves. Across your repos, your team, and the builders shaping the code you depend on. Even the non-human ones.
fix: map runtime modes to correct permission levels (#1587)
refactor: modernize state management hooks
feat: add telemetry integration for agent workflows
Story-Based Monitoring
Your agent said it's done. That's not the same as correct. We capture the intent in your code and show you whether the running code did what you meant.
See and build. Build and see. Verify intention. Repeat.
Download Principal AIBuilt for agents. Optimized for humans. Because you're still the boss of AI.