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mcp/harbor
LangChain

Fable Mode for LangChain

io.github.rex-codebase/fable-mode

Mechanical write gates, evidence receipts, and adversarial review for AI coding agents.

client:LangChain transport:stdio runtime:pypi

Install Fable Mode in LangChain

pip install langchain-mcp-adapters 

from langchain_mcp_adapters.client import MultiServerMCPClient

client = MultiServerMCPClient({
        "fable-mode": {
            "transport": "stdio",
            "command": "uvx",
            "args": ["fable-engine"],
        }
})

tools = await client.get_tools()

get_tools() returns the server's tools as LangChain tools, ready for an agent. LangChain docs

Fable Mode in other clients

Fable Mode MCP server