Claude Concilium
Multi-agent AI consultation framework for Claude Code via MCP.
Get a second (and third) opinion from other LLMs when Claude Code alone isn't enough.
Claude Code ──┬── OpenAI (Codex CLI) ──► Opinion A
├── Gemini (gemini-cli) ─► Opinion B
│
└── Synthesis ◄── Consensus or iterateThe Problem
Claude Code is powerful, but one brain can miss bugs, overlook edge cases, or get stuck in a local optimum. Critical decisions benefit from diverse perspectives.
The Solution
Concilium runs parallel consultations with multiple LLMs through standard MCP protocol. Each LLM server wraps a CLI tool — no API keys needed for the primary providers (they use OAuth).
Key features:
- Parallel consultation with 2+ AI agents
- Production-grade fallback chains with error detection
- Each MCP server works standalone or as part of Concilium
- Plug & play: clone,
npm install, add to.mcp.json
Architecture
┌─────────────────────────────────────────────────────────┐
│ Claude Code │
│ │
│ "Review this code for race conditions" │
│ │
│ ┌──────────────┐ ┌──────────────┐ │
│ │ MCP Call #1 │ │ MCP Call #2 │ (parallel) │
│ └──────┬───────┘ └──────┬───────┘ │
│ │ │ │
└─────────┼──────────────────┼──────────────────────────────┘
│ │
▼ ▼
┌──────────────┐ ┌──────────────┐
│ mcp-openai │ │ mcp-gemini │ Primary agents
│ (codex exec)│ │ (gemini -p) │
└──────┬───────┘ └──────┬───────┘
│ │
▼ ▼
┌──────────────┐ ┌──────────────┐
│ OpenAI │ │ Google │ LLM providers
│ (OAuth) │ │ (OAuth) │
└──────────────┘ └──────────────┘
Fallback chain (on quota/error):
OpenAI → Qwen → DeepSeek
Gemini → Qwen → DeepSeek
