Plugin Official

code-simplifier

Agent that simplifies code for clarity and maintainability while preserving behaviour.

Author: Anthropic
Works with: Claude Code
License: Apache-2.0
Documented: Oct 2, 2026

Repository ↗ Official docs ↗

What code-simplifier is

Plugin (v1.0.0) providing a code-simplifier agent.

What it does

Where code-simplifier runs and what it adds, from its documentation

Refines code for clarity and consistency
Preserves functionality
Improves maintainability

When to use it

Good fit

Cleaning up recently written code

Not for

Behaviour-changing refactors

How to install code-simplifier

You need: Claude Code

Marketplace ships enabled by default in Claude Code; or browse via /plugin > Discover
Install: /plugin install code-simplifier@claude-plugins-official
Run the plugin's commands/agents as described in its README
Trust check: Anthropic warns to trust a plugin before installing, as it cannot verify included MCP servers, files or software

Permissions and security

What it can access

Runs inside Claude Code; commands, agents and hooks use Claude Code's tool permissions (see plugin README for specifics)

Security notes from the maintainers

Marketplace README: make sure you trust a plugin before installing, updating, or using it

Review the source before granting an agent access to credentials or production systems. We document what the maintainers state; we do not audit code.

Tools it extends

Coding

Claude Code

Web · Desktop

No user reviews yet

Anthropic's agentic coding tool that reads your codebase, edits files and runs commands from the terminal, IDEs, desktop app or browser.

Watch out: Not included in the Free Claude plan, and usage on subscriptions is capped by plan limits.

Listed Not yet reviewed

Verified Sep 29, 2026 code.claude.com (opens Claude Code website in a new tab)

From $20/mo US · checked Sep 29

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Frequently asked questions

How do I install the code-simplifier plugin?

Run /plugin install code-simplifier@claude-plugins-official in Claude Code. source

Is the code-simplifier plugin made by Anthropic?

Yes, it is listed under /plugins (internal plugins developed by Anthropic) in the claude-plugins-official repo. source

What does the code-simplifier plugin add to Claude Code?

Agent that simplifies code for clarity and maintainability while preserving behaviour. source

Related guides

Claude Code plugins and marketplace: 40 profiled in 2026

Sources and gaps

https://raw.githubusercontent.com/anthropics/claude-plugins-official/main/plugins/code-simplifier/README.md readme, checked Oct 2, 2026
https://code.claude.com/docs/en/plugins docs, checked Oct 2, 2026
https://github.com/anthropics/claude-plugins-official readme, checked Oct 2, 2026

Not stated by the maintainers: last_release (not read); limitations not stated in README.