When Claude Code Spawns Sub-Agents to Search in Parallel
Claude Code's Task tool launches mini-agents in parallel — way faster than one agent doing everything itself.
7 min · Reviewed 2026
The big idea
When Claude Code needs to search 50 files for something, it doesn't read them one by one. It spawns 5 sub-agents (using the Task tool), each searches 10 files, and they report back. This is called 'fan-out.' It's the same trick a manager uses — delegate, then synthesize. Cursor's Composer and OpenAI's Swarm work the same way.
Some examples
You ask Claude Code 'find every TODO in this repo' — it fans out to 4 sub-agents.
Cursor splits 'audit this codebase for security issues' across multiple background agents.
OpenAI's Swarm framework runs three specialist agents (researcher, writer, fact-checker) on one essay.
Manus uses sub-agents to research 5 competitors in parallel for a market analysis.
Try it!
Ask Claude Code to 'find all uses of useState in this project' on a real repo. Watch the parallel sub-agent spinners.
End-of-lesson check
15 questions · take it digitally for instant feedback at tendril.neural-forge.io/learn/quiz/end-builders-agentic-subagents-and-fan-out-r7a8-teen
What is the core idea behind "When Claude Code Spawns Sub-Agents to Search in Parallel"?
Claude Code's Task tool launches mini-agents in parallel — way faster than one agent doing everything itself.
'I need a recipe using chicken and rice. Make a grocery list for it.'
summarizing
sports
Which term best describes a foundational idea in "When Claude Code Spawns Sub-Agents to Search in Parallel"?
parallelism
sub-agents
Task tool
fan-out
A learner studying When Claude Code Spawns Sub-Agents to Search in Parallel would need to understand which concept?
sub-agents
Task tool
parallelism
fan-out
Which of these is directly relevant to When Claude Code Spawns Sub-Agents to Search in Parallel?
sub-agents
parallelism
fan-out
Task tool
Which of the following is a key point about When Claude Code Spawns Sub-Agents to Search in Parallel?
You ask Claude Code 'find every TODO in this repo' — it fans out to 4 sub-agents.
Cursor splits 'audit this codebase for security issues' across multiple background agents.
OpenAI's Swarm framework runs three specialist agents (researcher, writer, fact-checker) on one essa…
Manus uses sub-agents to research 5 competitors in parallel for a market analysis.
Which of these does NOT belong in a discussion of When Claude Code Spawns Sub-Agents to Search in Parallel?
'I need a recipe using chicken and rice. Make a grocery list for it.'
Cursor splits 'audit this codebase for security issues' across multiple background agents.
You ask Claude Code 'find every TODO in this repo' — it fans out to 4 sub-agents.
OpenAI's Swarm framework runs three specialist agents (researcher, writer, fact-checker) on one essa…
What is the key insight about "The rule" in the context of When Claude Code Spawns Sub-Agents to Search in Parallel?
'I need a recipe using chicken and rice. Make a grocery list for it.'
summarizing
Fan-out is for read-only work. For writes, use one agent — parallel writes cause conflicts.
sports
Which statement accurately describes an aspect of When Claude Code Spawns Sub-Agents to Search in Parallel?
'I need a recipe using chicken and rice. Make a grocery list for it.'
summarizing
sports
When Claude Code needs to search 50 files for something, it doesn't read them one by one.
What does working with When Claude Code Spawns Sub-Agents to Search in Parallel typically involve?
Ask Claude Code to 'find all uses of useState in this project' on a real repo. Watch the parallel sub-agent spinners.
'I need a recipe using chicken and rice. Make a grocery list for it.'
summarizing
sports
Which best describes the scope of "When Claude Code Spawns Sub-Agents to Search in Parallel"?
It is unrelated to agentic workflows
It focuses on Claude Code's Task tool launches mini-agents in parallel — way faster than one agent doing everythin
It applies only to the opposite beginner tier
It was deprecated in 2024 and no longer relevant
Which section heading best belongs in a lesson about When Claude Code Spawns Sub-Agents to Search in Parallel?
'I need a recipe using chicken and rice. Make a grocery list for it.'
summarizing
Some examples
sports
Which section heading best belongs in a lesson about When Claude Code Spawns Sub-Agents to Search in Parallel?
'I need a recipe using chicken and rice. Make a grocery list for it.'
summarizing
sports
Try it!
Which of the following is a concept covered in When Claude Code Spawns Sub-Agents to Search in Parallel?
sub-agents
parallelism
Task tool
fan-out
Which of the following is a concept covered in When Claude Code Spawns Sub-Agents to Search in Parallel?
sub-agents
parallelism
Task tool
fan-out
Which of the following is a concept covered in When Claude Code Spawns Sub-Agents to Search in Parallel?