Best Claude Code subagents (by use case)

Subagents are specialized assistants Claude Code delegates work to, each with its own context. These are the roles worth having on your team — install any of them into .claude/agents/ in one click.

1. 1
   Code reviewer

   Reads your diff and flags real bugs, edge cases and risky changes before you commit.
2. 2
   Test writer

   Generates and updates unit / integration tests for the code you just changed.
3. 3
   Security auditor

   Scans for injection, secrets, auth gaps and unsafe dependencies.
4. 4
   Debugger

   Reproduces the failure, isolates the cause and proposes a targeted fix.
5. 5
   Refactorer

   Simplifies and de-duplicates code while keeping behavior identical.
6. 6
   Docs writer

   Turns code and decisions into README, API docs and changelog entries.
7. 7
   Frontend engineer

   Builds accessible, responsive UI components that match your design system.
8. 8
   Backend / API engineer

   Designs endpoints, data models and migrations with sensible defaults.
9. 9
   DevOps / SRE

   Writes CI, Dockerfiles and infra, and triages incidents.
10. 10
    Data / SQL analyst

    Writes and explains queries and turns questions into reports.

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