Copilot CLI Weekly: /fleet Ships — Parallel Multi-Agent Execution

/fleet: The CLI Gets a Team The biggest Copilot CLI release in months landed April 1: /fleet enables parallel multi-agent execution. Instead of working through tasks sequentially, Copilot now dispatches multiple sub-agents to work on different parts of your codebase simultaneously. GitHub's blog post describes it best: when you run /fleet Refactor the auth module, update tests, and fix the related docs, the orchestrator decomposes your task into discrete work items, identifies what can run in parallel, and dispatches independent items as background sub-agents. Think of it as a project lead assigning work to a team. This isn't just faster sequential execution — it's fundamentally different architecture. The orchestrator plans, breaks down dependencies, dispatches waves of parallel work, and synthesizes results. Each sub-agent gets its own context window but shares the filesystem. They can't talk to each other; only the orchestrator coordinates. The key to making /fleet work is writing p