Oswyn — Your Sage Companion

Oswyn is a browser-based AI assistant that knows everything about the Sage programming language. Ask questions about syntax, agents, LLM integration, tools, testing, supervision trees, and more — and get working code examples in return.

Chat with Oswyn →

Features

• Ask questions about any part of Sage and get working code examples
• Conversation memory across sessions (stored in your browser’s localStorage)
• Supports OpenAI, Anthropic, Ollama, and any OpenAI-compatible API
• Runs entirely in your browser — no backend, no data collection
• Your API key never leaves your browser

Setup

1. Open sagelang.github.io/oswyn
2. Click the settings icon and enter your API key
3. Start chatting

Example Questions

• “How do I create my first Sage agent?”
• “Explain the divine expression and LLM integration”
• “How do supervision trees work in Sage?”
• “Show me how to use the Http tool”
• “How do I mock LLM calls in tests?”

Privacy

Oswyn runs entirely in your browser. Your API key and conversation history are stored in localStorage and are never sent to any server other than your chosen LLM provider.

Oswyn in the CLI

You’ll also encounter Oswyn in the Sage CLI. When you compile and run programs, Oswyn provides warm, encouraging feedback:

👻 Oswyn is pleased. Your program compiled successfully.
→ sage run examples/research.sg

👻 Oswyn is consulting the ancient texts...
→ divine() awaiting LLM response

Ward handles the stern compiler warnings. Oswyn handles the encouragement. Between them, you’re in good hands.