Add Claude Code Plugin marketplace support (--tool claude-plugin)

[jasonz-ncc42]

Summary

Add support for distributing agency-agents as a proper Claude Code plugin via marketplace, in addition to the existing --tool claude-code integration that copies agents to ~/.claude/agents/.

Motivation

Claude Code's plugin system (via /plugin marketplace add) provides:

• Discoverability — users browse and install via /plugin UI
• Auto-updates — marketplace refresh pulls latest agents automatically
• Versioning — proper semver tracking via plugin.json
• Clean install/uninstall — managed by Claude Code, not manual file copies
• Namespacing — agency-agents:seo-specialist avoids conflicts with other plugins

Currently --tool claude-code copies 150+ .md files to ~/.claude/agents/, which:

• Pollutes the user-level agents directory
• Has no uninstall mechanism (manual deletion)
• No auto-update support
• Can conflict with agents from other sources

Proposed Changes

1. convert.sh — add claude-plugin tool

Converts all division agents into a single plugin under integrations/claude-plugin/agency-agents/:

integrations/claude-plugin/agency-agents/
├── .claude-plugin/
│   └── plugin.json          # Plugin manifest
└── agents/
    └── *.md                 # Converted agent files (kebab-case names)

2. Marketplace file at repo root

Add .claude-plugin/marketplace.json at repository root so the repo itself can be added as a marketplace:

{
  "name": "agency-agents",
  "owner": { "name": "The Agency" },
  "plugins": [
    {
      "name": "agency-agents",
      "source": "./integrations/claude-plugin/agency-agents",
      "description": "150+ specialized AI agent personalities for every domain"
    }
  ]
}

3. install.sh — add claude-plugin tool

Instead of copying files, prints installation instructions:

/plugin marketplace add msitarzewski/agency-agents
/plugin install agency-agents@agency-agents

Installation (user experience)

# From Claude Code:
/plugin marketplace add msitarzewski/agency-agents
/plugin install agency-agents@agency-agents
/reload-plugins

All 150+ agents become available as agency-agents:agent-name in any project.

References

• Claude Code Plugin docs
• Plugin Marketplace docs
• Working implementation available — happy to submit a PR.