decida

A local runtime for System One models. Send a state and typed questions, get a probability distribution for each one back from a single forward pass, with no generated text. It serves REST and MCP and includes a testbench of small games.

uv tool install git+https://github.com/heldernoid/decida
decida serve        # then open http://127.0.0.1:8000

Simulated request

The request on the left is real decida syntax. The response on the right is an illustration of its shape.


        

        

      

    


    

      
Three question types

      

        

          

            type
            you give
            you get back
          

          

            choice
            2 to 255 options, each with a description
            a probability for every option
          

          

            score
            an ordered list of 2 to 32 levels, lowest first
            a probability for every level, and the expected level
          

          

            noul
            a yes/no question about the state
            the probability that it is true
          

        

      

    


    

      
API

      
Every endpoint of a running server, with request and response models, is also in its interactive docs at
        /docs.
      

      

        

          

            Endpoint
            What it does
          

        

      

      
MCP tools (decida mcp): decide, classify_text,
        gate_tool_call, triage_failure, vet_dependency.