Create a custom subagent in Claude Code

Subagents really shine when you need to do the same task across many files at once. Instead of processing files one by one in your main thread, you can spawn off multiple subagents that work in parallel, and each has its own context window.

Let's build a really useful example: a PHPDoc generator agent that documents your entire Laravel codebase.

Why PHPDoc generation?

Generating docblocks within a subagent makes sense because it's low-risk and highly visible. The subagent will read your code, understand what each method does, and add the related documentation — without touching any actua...