Plugin Forge

If you're building plugins for Claude Code marketplaces, this handles the scaffolding and manifest wrangling so you don't have to. It includes Python scripts that generate the full directory structure, create both plugin.json and marketplace.json files, and bump semantic versions across both manifests at once. The real value is in the automation: creating a new plugin is one command instead of manually setting up directories and keeping two JSON files in sync. It also documents the subdirectory-based command naming pattern and includes reference docs on plugin structure. Solid time saver if you're shipping multiple plugins or maintaining a marketplace.

skills.sh installs: 4K
GitHub stars: 2.7K
last updated: Aug 21, 2026

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Install

$ npx -y skills add softaworks/agent-toolkit --skill plugin-forge --agent claude-code

Installs into .claude/skills of the current project.

Files

CC Plugin Forge

Purpose

Build and manage Claude Code plugins with correct structure, manifests, and marketplace integration. Includes workflows, automation scripts, and reference docs.

When to Use

Creating new plugins for a marketplace
Adding/modifying plugin components (commands, skills, agents, hooks)
Updating plugin versions
Working with plugin or marketplace manifests
Setting up local plugin testing
Publishing plugins

Getting Started

Create New Plugin

Use create_plugin.py to generate plugin structure:

python scripts/create_plugin.py plugin-name \
  --marketplace-root /path/to/marketplace \
  --author-name "Your Name" \
  --author-email "your.email@example.com" \
  --description "Plugin description" \
  --keywords "keyword1,keyword2" \
  --category "productivity"

This automatically:

Creates plugin directory structure
Generates plugin.json manifest
Creates README template
Updates marketplace.json

Bump Version

Use bump_version.py to update versions in both manifests:

python scripts/bump_version.py plugin-name major|minor|patch \
  --marketplace-root /path/to/marketplace

Semantic versioning:

SKILL.md on GitHub

Details

Repository: github.com/softaworks/agent-toolkit
Categories: Frontend Development, AI & Agent Building