What is Seshat?

Seshat is an open source runtime for AI agents, written in Go. It runs the loop that turns a language model into something that can act: it sends your request to the model, executes the tools the model asks for, feeds the results back, and repeats until the task is done.

Products built on Seshat

SeshatOSDesktop app: chat and projects

SeshatCloudHosted platform

Ways to use the runtime

Terminalseshat chat, seshat run

Go SDKEmbed it in your code

gRPC serverPlug it into a larger system

The runtime

• Query loop
• Tools
• Providers
• Sessions
• Skills
• MCP

Runtime and framework

Seshat is both. As a runtime you install it and use it as is: the terminal agent is ready after one command. As a framework you import it, add your own tools and providers, and ship your own agent.

Three ways to use it

Surface	Use it when	Start here
Terminal	You want an agent for your own work	Quick start
Go SDK	You are building an application with an agent inside	Your first agent
gRPC server	The agent must run as a service for other programs	Installation

What it gives you

• Model choice. Many providers, from hosted APIs to local models with Ollama. Switch without changing your code.
• Tools. Files, shell, search, web and more, each guarded by permissions.
• Memory of your work. Sessions are saved locally and can be resumed.
• Your rules. Skills are Markdown files that teach the agent your conventions. MCP servers add external tools.

Next