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Overview

Sage is an RSI Agent Harness, bringing task execution, independent evaluation, and recursive self-improvement into one runtime. These docs explain supported usage, integrations, and operating boundaries.

Choose your entry point

Your goal	Start here
Understand how RSI improves a Package	RSI workflow
Inspect an iteration without a model key	First RSI run
Install Desktop and use RSI	Desktop
Embed Sage in a Python application	Quick start · Host development
Provide a multi-user web service	Server
Configure models, tools, and Skills	Configuration · Tools and MCP
Integrate an existing client	Python API · HTTP API

Understand and extend the Harness

Core concepts · Architecture · Plugins · Memory · Support boundaries.

Operate and contribute

Environment variables · Troubleshooting · Development · Model-provider acceptance.

Running from source requires Python 3.12+. Desktop installers bundle the backend; Server currently supports one worker.

Documentation scope

This site maintains Sage product, SDK, protocol, and operating references. Legacy usage is covered by Sage v1 and the legacy reference directory. Customer delivery proposals, temporary audits, and phase-specific validation notes are not retained as repository documentation.