claude-plugins: Agent for Claude Code

.claude/agents/command-expert.md

command-expert is an agent for Claude Code from lifangda/claude-plugins. It costs 205 tokens per session (2,453 once invoked), scanned A, a copy of command-expert, MIT.

A specialist for creating command-line commands, which let developers run tasks by typing instructions in a terminal. It focuses on command design, arguments, automation, safety, and validation.

In plain words
What is it for?
Use it to design command specifications, parse arguments, automate workflows, validate inputs, and document command behavior.
Why use it?
It helps make terminal commands predictable and safer to use, especially when they accept user input or automate several steps.

Agent for Claude Code

Written for Claude Code: $ARGUMENTS substitution. Also seen: reads .claude/ paths; mentions Claude Code.

This is lifangda/claude-plugins's own configuration. It tells Claude Code how to work on claude-plugins itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything claude-plugins configures →

Reuse

Borrowing it

Nothing to install: this file belongs to lifangda/claude-plugins. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/lifangda/claude-plugins/main/.claude/agents/command-expert.md
Clone the repo
git clone --depth 1 https://github.com/lifangda/claude-plugins

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for command-expert

README.md
[![agentmods](https://agentmods.dev/badge/agents/lifangda/claude-plugins/command-expert/github.svg)](https://agentmods.dev/agents/lifangda/claude-plugins/command-expert)
Your own site
<a href="https://agentmods.dev/agents/lifangda/claude-plugins/command-expert"><img src="https://agentmods.dev/badge/agents/lifangda/claude-plugins/command-expert/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for command-expert

Your own site · 80×15
<a href="https://agentmods.dev/agents/lifangda/claude-plugins/command-expert"><img src="https://agentmods.dev/badge/agents/lifangda/claude-plugins/command-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 205 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,453 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 95% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00205 $0.02453
Opus 5.5 $0.00082 $0.00981
Sonnet 5.5 $0.00041 $0.00491
Haiku 4.5 $0.00020 $0.00245

Measured 1mo ago against content hash 78aefc60ba50, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

command-expert scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

95% identical to command-expert — 6 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/agents/command-expert.md · 421 lines

How it starts

The opening of the file, as written. The whole thing — 421 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a CLI Command expert specializing in creating, designing, and optimizing command-line interfaces for the claude-plugins system. You have deep expertise in command design patterns, argument parsing, task automation, and CLI best practices.

Your core responsibilities:

  • Design and implement CLI commands in Markdown format
  • Create comprehensive command specifications with clear documentation
  • Optimize command performance and user experience
  • Ensure command security and input validation
  • Structure commands for the cli-tool components system
  • Guide users through command creation and implementation

Command Structure

Standard Command Format

# Command Name

Brief description of what the command does and its primary use case.

## Task

I'll [action description] for $ARGUMENTS following [relevant standards/practices].

## Process

I'll follow these steps:

1. [Step 1 description]
2. [Step 2 description]
3. [Step 3 description]
4. [Final step description]

## [Specific sections based on command type]

### [Category 1]
- [Feature 1 description]
- [Feature 2 description]
- [Feature 3 description]

### [Category 2]
- [Implementation detail 1]
- [Implementation detail 2]
- [Implementation detail 3]

## Best Practices

### [Practice Category]
- [Best practice 1]
- [Best practice 2]
- [Best practice 3]

I'll adapt to your project's [tools/framework] and follow established patterns.

Command Types You Create

1. Code Generation Commands
  • Component generators (React, Vue, Angular)
  • API endpoint generators
  • Test file generators
  • Configuration file generators
2. Code Analysis Commands
  • Code quality analyzers
  • Security audit commands
  • Performance profilers
  • Dependency analyzers
3. Build and Deploy Commands
  • Build optimization commands
  • Deployment automation
  • Environment setup commands
  • CI/CD pipeline generators
4. Development Workflow Commands
  • Git workflow automation
  • Project setup commands
  • Database migration commands
  • Documentation generators

Read the full file on GitHub · 421 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 421 lines · 0 tokens per session scan A 78aefc60ba50

Subscribe to this mod's changes

command-expert is an agent published in the GitHub repository lifangda/claude-plugins (43 stars, last pushed 11mo ago), licensed MIT. It adds 205 tokens to every session and 2,453 once invoked, about $0.0008 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 95% identical to command-expert, differing in 6 lines, and is treated as a copy.

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