GitHub Copilot SDK — Build AI Coding Agents

⚡ TL;DR

• What: Programmable SDK exposing the same agentic AI engine behind GitHub Copilot CLI
• When: Went GA at Microsoft Build on June 2, 2026
• Languages: Python, TypeScript/Node.js, Go, .NET, Rust, Java
• Pricing: SDK is free; requires Copilot subscription (Free tier available, Pro $10/mo, Pro+ $39/mo)
• Use case: Build custom AI coding agents, automate dev workflows, create developer tools
• Key differentiator: Same engine as Copilot CLI — multi-file edits, terminal commands, tool orchestration, auto-correction

🧠 What Is the GitHub Copilot SDK?

Think of a traditional coding tool as a smart keyboard that predicts the next word. An AI agent is more like a dedicated assistant — you set a goal, it figures out the steps, uses the right tools, and gets the job done.

The GitHub Copilot SDK exposes the same agentic engine behind Copilot CLI as a programmable library. Instead of typing commands in a terminal, you embed AI coding capabilities directly into your own applications.

🐍 Quick Start: Python Example

Get started with the Copilot SDK in Python in under 5 minutes.

1. Install

pip install copilot-sdk

2. Authenticate

# Login via GitHub CLI (recommended)
gh auth login

# Or set token directly
export GITHUB_TOKEN=ghp_your_token_here

3. Create Your First Agent

from copilot_sdk import CopilotAgent

agent = CopilotAgent(
    model="claude-sonnet-4",   # or gpt-4.1, gemini-2.5-pro
    workspace="/path/to/your/project"
)

# Ask the agent to do something
result = agent.run(
    "Add a /health endpoint to the Flask app that returns "
    "JSON with status, uptime, and version. Add tests."
)

print(result.summary)
print(f"Files modified: {result.files_changed}")
print(f"Tests passed: {result.tests_passed}")

4. Advanced: Custom Tools

from copilot_sdk import CopilotAgent, Tool

# Register custom tools the agent can use
agent = CopilotAgent(
    model="claude-sonnet-4",
    workspace="/path/to/project",
    tools=[
        Tool(name="deploy", fn=lambda ctx: deploy_to_staging()),
        Tool(name="test", fn=lambda ctx: run_pytest()),
    ],
    permissions={"file_write": True, "terminal": True}
)

# Agent autonomously uses tools as needed
result = agent.run("Refactor the auth module, run tests, deploy to staging")

📦 Quick Start: Node.js / TypeScript

npm install @github/copilot-sdk

import { CopilotAgent } from "@github/copilot-sdk";

const agent = new CopilotAgent({
  model: "gpt-4.1",
  workspace: process.cwd(),
});

const result = await agent.run(
  "Add rate limiting middleware to all API routes. " +
  "Use Redis for distributed rate limiting. " +
  "Add unit tests for the middleware."
);

console.log(result.summary);
console.log(`Modified ${result.filesChanged.length} files`);

🐹 Quick Start: Go

go get github.com/github/copilot-sdk-go

package main

import (
    "fmt"
    copilot "github.com/github/copilot-sdk-go"
)

func main() {
    agent := copilot.NewAgent(copilot.Config{
        Model:     "claude-sonnet-4",
        Workspace: ".",
    })

    result, err := agent.Run(
        "Convert all database queries from raw SQL to use sqlx. " +
        "Add connection pooling. Write migration scripts.",
    )
    if err != nil {
        panic(err)
    }

    fmt.Println(result.Summary)
    fmt.Printf("Files changed: %d\n", len(result.FilesChanged))
}

⚖️ Copilot SDK vs CLI vs App vs VS Code

💰 Copilot SDK Pricing (June 2026)

The SDK itself is free. You need a GitHub Copilot subscription to use it.

⚠️ Important: GitHub Copilot switched to token/request-based billing in June 2026. Heavy SDK users on agent loops should monitor usage carefully — overages at $0.04/request can add up fast.

🚀 What Can You Build with the Copilot SDK?

⚔️ Copilot SDK vs Alternatives for Building AI Agents

❓ Frequently Asked Questions