Using rig with a copilot proxy - passenger-rs

[gr211]

🚀 Announcing passenger-rs: Use GitHub Copilot with Rig

Hey Rig community! 👋

I've built a proxy server that lets you use GitHub Copilot models (including Claude Sonnet 4.5) with Rig and other Ollama-compatible frameworks.

Why?

GitHub Copilot provides access to powerful models like Claude Sonnet 4.5, but uses a proprietary API format. passenger-rs bridges this gap by converting Copilot's API into OpenAI and Ollama-compatible formats that work seamlessly with Rig.

How?

Built in Rust using Axum and Tokio. The proxy handles:

• GitHub OAuth authentication
• Automatic token management and refresh
• Request/response transformation between Rig/Ollama format and Copilot format

Usage with Rig

use rig::providers::ollama;
let client = ollama::Client::builder()
    .base_url("http://127.0.0.1:8081/v1")
    .build()?;
let model = client.completion_model("claude-sonnet-4.5");
let agent = AgentBuilder::new(model)
    .preamble("You're an AI assistant powered by GitHub Copilot")
    .name("copilot-agent")
    .max_tokens(2000)
    .build();

Check it out: grumlimited/passenger-rs

Installation packages available for Arch Linux and Ubuntu, or build from source.

Would love to hear feedback from the community! 🦀