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Build agentic applications with GitHub Copilot SDK.
Passed 25 of 25 test cases with the skill, and 11 of 25 without it.
and 19 more in the full report
14 fixed11 passed either way0 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 14 test cases the skill fixed. Same model, same prompt, with and without the skill.
When initializing a Python agent session, I want to attach a specialized agent persona named sec-auditor with display name Security Auditor, description Audits code, and prompt Check for OWASP flaws. What key in client.create_session dictionary accepts custom agent definitions?
| Checked | Without skill | With skill |
|---|---|---|
| Passes key custom_agents containing a list of objects with name, display_name, description, and prompt | Missed | Passed |
The instructions your model reads when the skill loads.
Embed Copilot's agentic workflows in any application using Python, TypeScript, Go, or .NET.
The GitHub Copilot SDK exposes the same engine behind Copilot CLI: a production-tested agent runtime you can invoke programmatically. No need to build your own orchestration - you define agent behavior, Copilot handles planning, tool invocation, file edits, and more.
Verify CLI: copilot --version
mkdir copilot-demo && cd copilot-demo
npm init -y --init-type module
npm install @github/copilot-sdk tsx
pip install github-copilot-sdk
mkdir copilot-demo && cd copilot-demo
go mod init copilot-demo
go get github.com/github/copilot-sdk/go
dotnet new console -n CopilotDemo && cd CopilotDemo
dotnet add package GitHub.Copilot.SDK
test cases passed, vs 11 / 25 without
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