Multi-agent AI consultation framework for Claude Code via MCP — get second opinions from OpenAI, Gemini, Qwen, DeepSeek

Gemini 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 iterate

The 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 fo