Sidecar Association Coworker — AI-powered tools for all types of associations: professional societies, trade associations, enthusiast clubs, fraternal organizations, chambers of commerce, standards bodies, alumni groups, and more. Provides slash commands and domain expertise for membership lifecycle, governance, events, communications, advocacy, and beyond.
Create compelling advocacy briefs, position papers, and policy documents.
Create compelling annual reports and impact summaries.
Prepare comprehensive board meeting materials and executive briefings.
Conduct comprehensive bylaws review and modernization.
Design and manage continuing education and professional development programs.
This skill provides comprehensive knowledge for planning and executing effective advocacy and government relations programs.
This skill provides foundational knowledge about association management, structures, and operations.
This skill provides comprehensive knowledge for managing geographic chapters, sections, and local affiliate organizations.
This skill provides comprehensive knowledge for association communications, marketing, branding, and public relations.
This skill provides comprehensive knowledge for implementing diversity, equity, and inclusion initiatives in association contexts.
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AI-powered tools for associations and the communities they serve.
We believe that every association deserves access to expert-level tools, regardless of their size or budget. Professional societies, trade associations, enthusiast clubs, fraternal organizations, chambers of commerce, and nonprofit organizations do vital work connecting communities, advancing professions, and advocating for important causes.
This repository provides free, open-source Claude Cowork plugins that encode decades of association management best practices into AI-powered tools anyone can use. No infrastructure required. No vendor lock-in. Just immediate value.
flowchart LR
subgraph "Free Standalone Value"
A[Association Professional] --> B[Sidecar Cowork Plugin]
B --> C[Expert-Quality Output]
end
subgraph "Enhanced with MemberJunction"
D[MemberJunction Platform] --> E[MCP Server]
E --> B
B --> F[Automated Workflows]
F --> G[Connected Data]
end
style A fill:#e1f5fe
style C fill:#c8e6c9
style G fill:#c8e6c9
| Plugin | Description | Status |
|---|---|---|
| Sidecar Association Coworker | 16 commands + 12 skills for all types of associations | ✅ Ready |
| MJ Admin/Developer | Tools for MemberJunction developers - entity queries, migrations, codegen | 🚧 Planned |
| MJ Agent Builder | Create, test, and iterate on MJ AI agents through Cowork | 🚧 Planned |
Each plugin follows the Claude Cowork standard structure with no runtime code and no build steps:
plugin-name/
├── .claude-plugin/
│ └── plugin.json # Plugin metadata and configuration
├── .mcp.json # MCP server integrations
├── commands/ # Slash commands (user-invoked actions)
│ ├── command-one.md
│ └── command-two.md
├── skills/ # Domain knowledge (markdown expertise)
│ └── skill-name/
│ └── SKILL.md
└── README.md # Plugin documentation
flowchart TB
subgraph Plugin["Sidecar Cowork Plugin"]
Commands["📋 Slash Commands<br/><i>User-invoked actions</i>"]
Skills["🧠 Skills<br/><i>Domain knowledge</i>"]
MCP["🔌 MCP Connectors<br/><i>External integrations</i>"]
end
subgraph Cowork["Claude Cowork"]
AI["Claude AI"]
end
subgraph External["External Services"]
Search["Web Search"]
Fetch["Content Fetch"]
Memory["Persistent Memory"]
MJMCP["MemberJunction MCP"]
end
Commands --> AI
Skills --> AI
MCP --> Search
MCP --> Fetch
MCP --> Memory
MCP --> MJMCP
style Plugin fill:#fff3e0
style Cowork fill:#e3f2fd
style External fill:#f3e5f5
In Claude Cowork, add the Sidecar plugin marketplace:
https://raw.githubusercontent.com/MemberJunction/co-work-plugins/main/.claude-plugin/marketplace.json
Invoke commands directly in your conversation:
/member-onboarding corporate --tier=premium --industry=healthcare
/board-prep regular --date="2024-03-15" --format=hybrid
/event-planning annual-conference --scale=large --budget="$500k"
The plugin's skills automatically inform Claude's responses with association management best practices, governance frameworks, and industry knowledge.
Our plugins are designed with a tiered value approach:
graph TB
subgraph Tier1["🆓 Tier 1: Standalone Value"]
T1A["Works immediately"]
T1B["No infrastructure needed"]
T1C["Expert-quality output"]
T1D["Free forever"]
end
subgraph Tier2["⚡ Tier 2: Enhanced with MCP"]
T2A["Web search integration"]
T2B["Content analysis"]
T2C["Persistent memory"]
end
subgraph Tier3["🚀 Tier 3: MemberJunction Integration"]
T3A["Connected member data"]
T3B["Automated workflows"]
T3C["Real-time analytics"]
T3D["Full platform power"]
end
Tier1 --> Tier2
Tier2 --> Tier3
style Tier1 fill:#c8e6c9
style Tier2 fill:#fff9c4
style Tier3 fill:#bbdefb
Start free. Grow when ready.
Associations operate at the intersection of community, commerce, and cause. They:
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