create-plugin

A procedure for creating a new Claude Code plugin with its manifest and standard folders. A plugin is a package that can contain commands, agents, skills, hooks, scripts, and service connections.

In plain words
What is it for?
Use it to scaffold plugin.json, create the directory structure, and optionally add folders for commands, agents, skills, hooks, scripts, and documentation.
Why use it?
It prevents missing required files or using an invalid plugin layout when starting from scratch.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/jpoutrin/product-forge/create-plugin
Any agent
npx skills add jpoutrin/product-forge --skill create-plugin
Clone the repo
git clone --depth 1 https://github.com/jpoutrin/product-forge

Made for: Claude Code, Codex.

Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,195 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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 $0.00041 $0.02195
Opus 5 $0.00020 $0.01097
Sonnet 5 $0.00008 $0.00439
Haiku 4.5 $0.00004 $0.00219

Measured 2d ago against content hash 459eefd71300, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

create-plugin 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 2d 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.

plugins/claude-code-dev/skills/create-plugin/SKILL.md · 335 lines

How it starts

The opening of the file, as written. The whole thing — 335 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Create Plugin Skill

Create new Claude Code plugins with proper structure and configuration.

Plugin Directory Structure

plugin-name/
├── .claude-plugin/           # Required: Metadata directory
│   └── plugin.json          # Required: Plugin manifest
├── commands/                 # Optional: Command definitions
│   ├── command1.md
│   └── command2.md
├── agents/                   # Optional: Agent definitions
│   ├── agent1.md
│   └── agent2.md
├── skills/                   # Optional: Agent Skills
│   ├── skill-name/
│   │   └── SKILL.md
│   └── another-skill/
│       ├── SKILL.md
│       └── scripts/
├── hooks/                    # Optional: Hook configurations
│   ├── hooks.json           # Main hook config
│   └── additional-hooks.json
├── .mcp.json                # Optional: MCP server definitions
├── scripts/                 # Optional: Hook and utility scripts
│   ├── script1.sh
│   └── script2.py
├── LICENSE                  # Optional: License file
├── CHANGELOG.md             # Optional: Version history
└── README.md                # Optional: Documentation

Plugin Manifest (plugin.json)

Required Fields

Field Type Description
name string Plugin identifier (kebab-case recommended)
version string Semantic version (e.g., "1.2.0")
description string Brief description of the plugin

Optional Fields

Field Type Description
author object Author information
author.name string Author's name (required if author present)
author.email string Author's email
author.url string Author's website or GitHub profile
homepage string Plugin documentation URL
repository string Git repository URL
license string License identifier (e.g., "MIT", "Apache-2.0")
keywords array Searchable keywords
commands string or array Custom command locations (directory or file paths)
agents array Array of agent file paths (must end with .md)
hooks string Custom hook configuration file location
mcpServers string Custom MCP server configuration file location

Read the full file on GitHub · 335 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. 2d ago First seen · 335 lines · 41 tokens per session scan A 459eefd71300

Subscribe to this mod's changes

create-plugin is a skill published in the GitHub repository jpoutrin/product-forge (15 stars, last pushed 6mo ago), licensed MIT. It adds 41 tokens to every session and 2,195 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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