Add GitHub Copilot SDK as a back end#12
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badlydrawnrod merged 9 commits intodevelopfrom Jan 28, 2026
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Summary
This PR adds the GitHub Copilot SDK as an alternative backend to Agent C, alongside the existing Pydantic AI backend. The implementation introduces a pluggable backend architecture that allows Agent C to use either backend while maintaining the same event-driven, layered architecture.
Key Changes
Backend Architecture Refactoring
Reorganized core logic into backends/ subdirectory with two implementations:
backends/pydantic_ai/- the original implementation using Pydantic AIbackends/github_copilot/- a new implementation using the GitHub Copilot SDKMoved tools, types, and session factories into backend-specific packages.
Introduced
SessionFactoryProtocolfor backend abstraction.Entry Points
Moved entry points to dedicated
entrypoints/package.