How to Use Claude Code Subagents to Run Parallel Tasks

I’ve been using Claude Code subagents daily for the past few months. They’re the feature that turned Claude Code from a useful assistant into something that actually scales - running multiple tasks at once without losing context or focus. Here’s how they work, when to reach for them, and the patterns that actually matter in practice. What Claude Code Subagents Are A subagent is a separate Claude Code instance that your main session spawns to handle a scoped task.