Updated headers for GitHub Copilot Extension requests

On March 31, 2025, GitHub Copilot Extensions will require an updated header format for agent requests. Both updated and previous versions of the request headers will be supported until then. These headers denote requests that come from GitHub and enable your extension to communicate with GitHub.

Updated headers:
– X-GitHub-Public-Key-Identifier
– X-GitHub-Public-Key-Signature

Previous headers, to be deprecated on March 31, 2025:
– Github-Public-Key-Identifier
– Github-Public-Key-Signature

Please update your relevant checks to the correct headers by March 31, 2025 for a consistent experience and to avoid breaking changes. To learn more, visit this page.