In this video I’m testing the brand-new Claude Code “Agent Teams” feature, and it genuinely feels like peering into the future of agentic engineering. Instead of one agent grinding through everything sequentially (or subagents working in isolation), I can have multiple Claude Code instances running at the exact same time, sharing a task list, and coordinating in real time. I demo a practical example—spinning up a team to review my codebase with dedicated roles (security, code quality, docs)—and show how Claude creates the split-pane setup through tmux/iTerm so you can interact with each agent directly. I also break down the key difference everyone’s confused about: subagents are great for context-isolated research where you only want a summary back, while Agent Teams are built for implementation because the agents actually communicate and don’t constantly step on each other’s toes. That said, Agent Teams are token-heavy (often 2–4x), the collaboration visibility is still pretty rough, and you sometimes have to be extremely specific or Claude will form weird teams or mis-handle terminals. To address that, I share my custom “build with agent team” skill, including a contract-first spawning approach so upstream work (like DB schema) lands before downstream agents sprint ahead on the wrong assumptions.