What is the /fleet slash command and what problem does it solve?

The /fleet command allows Copilot CLI to spawn multiple subagents that work in parallel on different parts of a complex implementation plan. This dramatically speeds up multi-step tasks that would otherwise need to be executed sequentially.

# Example: implement a feature with multiple independent components
/fleet
# Copilot divides the work into parallel sub-tasks:
# Subagent 1: Update the database schema
# Subagent 2: Write unit tests
# Subagent 3: Update API documentation
# All run simultaneously - dramatically faster than sequential

# You can monitor progress from GitHub.com or mobile
# while /fleet coordinates the subagents in the background

How /fleet works:

• Copilot analyses your task and identifies parts that can be worked on in parallel
• It spawns subagents, each with their own context and tool access
• Results are coordinated and merged
• You stay in control - you can monitor, steer, and merge from GitHub.com or GitHub Mobile

Typical use case: large features that span multiple files or subsystems - e.g. adding a new API endpoint (requires schema change + controller + tests + docs). Without fleet, Copilot does these sequentially; with fleet, they run in parallel.

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