Function Calling Extensions Sample

Note

Copilot Extensions are in public beta and may be subject to change All users with a GitHub Copilot Individual subscription or higher can use Copilot Extensions

Description

This project is a Go application that demonstrates how to use function calling in a GitHub Copilot Extension.

Prerequisites

• Go 1.16 or higher
• Set the following environment variables (example below):

export PORT=8080
export CLIENT_ID=Iv1.0ae52273ad3193eb // the application id
export CLIENT_SECRET="your_client_secret" // generate a new client secret for your application
export FQDN=https://6de513480979.ngrok.app // use ngrok to expose a url

Installation:

1. Clone the repository:

git clone git@github.com:copilot-extensions/function-calling-extension.git
cd function-calling-extension

2. Install dependencies:

go mod tidy

Usage

1. Start up ngrok with the port provided:

ngrok http http://localhost:8080

2. Set the environment variables (use the ngrok generated url for the FDQN)
3. Run the application:

go run .

Accessing the Agent in Chat:

1. In the Copilot tab of your Application settings (https://github.com/settings/apps/<app_name>/agent)

• Set the URL that was set for your FQDN above with the endpoint /agent (e.g. https://6de513480979.ngrok.app/agent)
• Set the Pre-Authorization URL with the endpoint /auth/authorization (e.g. https://6de513480979.ngrok.app/auth/authorization)

2. In the General tab of your application settings (https://github.com/settings/apps/<app_name>)

• Set the Callback URL with the /auth/callback endpoint (e.g. https://6de513480979.ngrok.app/auth/callback)
• Set the Homepage URL with the base ngrok endpoint (e.g. https://6de513480979.ngrok.app/auth/callback)

3. Ensure your permissions are enabled in Permissions & events >

• Repository Permissions > Issues > Access: Read and Write
• Account Permissions > Copilot Chat > Access: Read Only

4. Ensure you install your application at (https://github.com/apps/<app_name>)
5. Now if you go to https://github.com/copilot you can @ your agent using the name of your application.

What Can It Do

Test out the agent with the following commands!

Description	Prompt
User asking @agent to create a GitHub issue	@agent Create an issue in the repo (org/repo) with title "my first issue" and body "hooray I created an issue"
User asking @agent to list GitHub issues	@agent list all issues in this repo (org/repo)

Copilot Extensions Documentation

• Using Copilot Extensions
• About building Copilot Extensions
• Set up process
• Communicating with the Copilot platform
• Communicating with GitHub