Why multiple agents need isolation to avoid overwriting each other

When you have multiple agents working on the same codebase at the same time — one building an email client, another setting up a Linux environment, another updating a landing page — they need to operate in isolation. Without that, agents overwrite each other's work. As Greg Isenberg puts it, about 95% of the time when people are building with agents, agents end up messing up and overwriting things. The isolation approach is analogous to how a real engineering team works: you wouldn't have every developer pushing directly to main. Each agent gets its own branch and its own workspace, so they can move in parallel without stepping on each other. Once the work is merged, the branch and work tree are cleaned up automatically. The idea is to structure the way you work with agents to feel more like managing a team rather than having a single agent do everything sequentially.