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AnthropicOfficial ReleaseOfficial SourceNew
Claude Code ships subagents in isolated context windows
Long refactors no longer pollute the parent context — a child agent does the noisy work and reports back.
AnthropicJul 2, 20264 min
Source Summary
Subagents get their own context window and a clean handoff contract. The parent session receives only the result summary and the list of touched files.
Practical Implication
Fewer derailed sessions on big tasks. Route any task over ~20 file edits to a subagent and keep your planning context clean.
Agent-Ready Context
Claude Code subagents run in isolated context. Use them for long refactors and research sweeps: the parent stays clean while a child does the noisy work, then reports which files remain. Prefer for tasks >20 file edits.
Labels
Coding AgentsContext EngineeringClaude CodePrepare Coding SessionImprove Agent Reliability
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Graph is progressive enhancement. Every edge listed below.