algorithm-expert

Marketplace

Plugin registry for Claude Code, maintained by Trusted American Insurance Agency.

Repository layout

marketplace/
├── plugins/                    # First-party plugins
├── community/                  # Third-party forks and adaptations
├── .claude-plugin/
│   └── marketplace.json        # Auto-generated plugin index (do not edit)
├── tools/
│   ├── lib/registry.js         # Shared registry generation logic
│   ├── generate-marketplace-json.js  # CLI script to regenerate marketplace.json
│   └── marketplace-mcp/        # MCP server for plugin management
├── .github/workflows/ci.yml    # Validation + registry generation
└── .mcp.json                   # Auto-loads the MCP server in Claude Code

Plugin structure

Every plugin in plugins/ or community/ must contain these files:

File	Purpose
README.md	Usage documentation
LICENSE	License file
.claude-plugin/plugin.json	Plugin manifest

Components go in the plugin root, never inside .claude-plugin/:

plugin-name/
├── .claude-plugin/
│   └── plugin.json          # Manifest — only file in this directory
├── skills/                  # Each skill is a subdirectory with a SKILL.md
│   └── skill-name/
│       └── SKILL.md
├── agents/                  # Agent definitions (.md files)
│   └── agent-name.md
├── commands/                # Slash command definitions (.md files)
│   └── command-name.md
├── hooks/                   # Hook configurations (.json files)
│   └── hooks.json
├── templates/               # Output templates (.md files)
│   └── template-name.md
├── .mcp.json                # MCP server config (optional)
├── README.md
└── LICENSE

plugin.json manifest

The name field is required and must be kebab-case (^[a-z0-9-]+$). All other fields are optional but recommended.

{
  "name": "my-plugin",
  "version": "0.1.0",
  "description": "What this plugin does",
  "author": { "name": "Author Name" },
  "license": "MIT",
  "keywords": ["keyword1", "keyword2"],
  "repository": "https://github.com/org/repo"
}

Names must be unique across the entire marketplace. If two plugins share a name, CI will warn and the second one overwrites the first in .claude-plugin/marketplace.json.

How marketplace.json works

.claude-plugin/marketplace.json is a generated index of all plugins. It is not updated in PRs. The flow:

1. A PR adds or modifies plugins and passes CI validation.
2. The PR merges to main.
3. CI runs node tools/generate-marketplace-json.js, which scans plugins/ and community/, reads each plugin.json, collects component directories, and writes .claude-plugin/marketplace.json.
4. CI commits the updated file to main with [skip ci] to avoid a loop.

The lastUpdated timestamp updates on every run. The generation logic lives in tools/lib/registry.js and is shared between the CLI script and the MCP server.

MCP server

The MCP server at tools/marketplace-mcp/ auto-loads when you open this repo in Claude Code (configured in .mcp.json). It exposes 6 tools:

Tool	What it does
create_plugin	Scaffolds a new plugin with required files and correct directory structure
validate_plugin	Checks a plugin for required files, valid manifest, and component structure
validate_all	Validates every plugin in plugins/ and community/
list_plugins	Lists all plugins with version, description, and component breakdown
add_component	Adds a skill, agent, command, hook, or template to an existing plugin
get_conventions	Returns the full marketplace conventions document

Validation checks: required files exist, plugin.json is valid JSON with a kebab-case name, and any component directories that exist contain correctly typed files (.md for skills/agents/commands/templates, .json for hooks).

CI pipeline

Every push and PR runs two jobs:

1. Validate plugins — Shell script checks every directory in plugins/ and community/ for README.md, LICENSE, and a valid .claude-plugin/plugin.json with a kebab-case name.
2. Test MCP server — Runs npm test in tools/marketplace-mcp/ (vitest, 57 tests covering validation, registry generation, component handling, and security).

On merge to main, a third job runs:

3. Update registry — Regenerates .claude-plugin/marketplace.json and commits it.

Setup

Prerequisites: Claude Code and Node.js 18+ (22 recommended).

git clone https://github.com/trusted-american/marketplace.git
cd marketplace
npm ci --prefix tools/marketplace-mcp

Open the repo in Claude Code. The MCP server loads automatically. Run list plugins to verify.

Optional: Atlassian integration

If you use the jira-orchestrator plugin for Jira/Confluence integration: