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SubagentInstalls cleanly

Plan and review code changes

Feature Dev plugin (Anthropic)

Anthropic's feature-dev plugin adds three agents: one explores your code, one designs the change and one reviews it, in a seven-step workflow.

Works with
Claude Code
Good for
Web developers, Build an app

What it does

What it is

A subagent is a helper that your main agent can call for one job. The feature-dev plugin from Anthropic adds three helpers:

  • code-explorer reads your project and explains how a feature works today.
  • code-architect plans how the new feature should fit in.
  • code-reviewer checks the new code for bugs and mistakes.

The command /feature-dev runs all three in seven steps.

Who it helps

People who add features to an existing project and want a careful process instead of one big change.

Be careful

The agents can edit files. Work in a project you can restore. The process takes longer and uses more of your usage limit than a single request.

How to install

/plugin install feature-dev@claude-plugins-official

How to use it

Type /feature-dev followed by what you want, for example /feature-dev Add user login with OAuth. The agents explore the code, ask you questions, design the change, build it and review it.

What to watch out for

  • The agents read your code and can edit files in the project. Use a project under version control.
  • The workflow asks many questions and uses helper agents, which use more of your usage limit.

Licence and author

Licence
Apache-2.0
Author
Anthropic
Source code
github.com/anthropics/claude-plugins-official

How we tested it

We installed it on an empty test computer on 12 Oct 2026. Installed and started in a clean test system. Not yet used in a real AI session.

Test level

We did not run the /feature-dev workflow with a model. We did not judge the quality of the agents' advice.

Technical details of the test
Date
12 Oct 2026
Method
Added the official Anthropic marketplace and installed feature-dev with the Claude Code command line in a clean container with no account. The plugin showed as enabled and the folder held 3 agent files (code-explorer, code-architect, code-reviewer). All 3 have a name and a description.

Checked again on 12 Oct 2026

Sources

  • github.com/anthropics/claude-plugins-official/tree/main/plugins/feature-dev