Subagent

A subagent is a secondary agent invoked by a parent Agent to handle a specific subtask, running with its own system prompt and tool set. Its key benefit is context isolation: a code-review subagent can investigate and return a concise summary without polluting the parent's chat history. The pattern is widely used in Anthropic's Claude Agent SDK and coding tools like Cursor, enabling decomposition and parallel execution of complex tasks. When designed well it conserves the Context Window and becomes a fundamental building block of Multi-agent System architectures.