Running Multiple Agents Simultaneously with Copilot CLI's /fleet Command

A new slash command, /fleet, has been introduced to GitHub Copilot CLI. This feature goes beyond a single task by simultaneously running multiple sub-agents to perform complex goals in parallel.

An internal orchestrator breaks down the user's request into independent units of work, determines whether they can be executed in parallel, and assigns tasks to the agents. Each agent has its own individual context window while sharing the same file system to collaborate.

For effective use, the following prompting strategies are needed:

• Specify concrete deliverables: Clear outputs such as files, test suites, and documentation should be specified for smooth parallel processing.
• Set clear boundaries: Limit the scope of agents by including the work scope (directories), constraints, and validation criteria.
• Declare dependencies: Specify the order of precedence between tasks so that the orchestrator can optimize execution order.

In addition, custom agents with specific models and tools designated can be defined in the .github/agents/ directory and called from within /fleet prompts.