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Claude plugin structure

The Brand Kit OS Cowork plugin (v1.2.0) bundles MCP, skills, hooks, agents, and slash commands into a single uploadable folder.

Layout

brand-kit-os-plugin/
├── plugin.json          # capabilities manifest
├── .mcp.json            # MCP server connection (API key pre-embedded)
├── hooks.json           # session_start hook
├── README.md
├── skills/
│   ├── brand-context/
│   └── brand-voice-enforcement/
├── agents/
│   ├── content-generation.md
│   ├── brand-review.md
│   ├── audience-adaptation.md
│   ├── quality-assurance.md
│   └── cowork-digest-publisher.md
└── commands/
    ├── enforce-voice.md
    └── create-content.md

Capabilities (plugin.json)

mcp, skills, hooks, agents, commands — all enabled.

Session-start hook (hooks.json)

On every new Cowork session:

1. Calls list_brand_kits
2. If exactly one kit exists → auto-loads get_brand_kit_summary
3. If multiple → prompts the user to choose

Skills

• brand-context — when and how to load brand data
• brand-voice-enforcement — pre-flight checklist for content review

Agents

Slash commands

• /brand-kit:enforce-voice — load guidelines and apply them to a content request
• /brand-kit:create-content — generate brand-aligned content for a type, audience, and topic

Conditional MCP injection

When Leafpad is linked under Partner Integrations, the downloaded .mcp.json automatically gains a leafpad server entry — required by the cowork-digest-publisher agent.