Add GitHub Copilot LLM Backend Integration #5693
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vhvb1989
requested review from
JeffreyCA,
hemarina,
rajeshkamal5050,
tg-msft,
wbreza and
weikanglim
as code owners
tg-msft
approved these changes
Oct 13, 2025
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| // loadGitHubToken loads the saved GitHub access token | ||
| func loadGitHubToken() (string, error) { |
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Nit - do we have this kind of token cache in enough other places that it's worth its own little wrapper? It'd be nice to treat all of our token/cred caches the same if possible.
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| // deviceCodeFlow performs the GitHub device code authentication flow | ||
| func deviceCodeFlow(ctx context.Context, console input.Console) (string, error) { |
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Nit - ditto on whether this Device Code flow could be packaged up for reuse elsewhere.
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| ghCpModel, err := openai.New( | ||
| openai.WithToken(tokenData.Token), | ||
| openai.WithBaseURL(githubCopilotApi), | ||
| openai.WithAPIType(openai.APITypeOpenAI), // GitHub Copilot uses the OpenAI API type | ||
| openai.WithModel("gpt-4"), | ||
| openai.WithHTTPClient(&httpClient{}), |
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Do we have the ability to pass a version here?
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| callOptions := []llms.CallOption{} | ||
| ghCpModel.CallbacksHandler = modelContainer.logger | ||
| callOptions = append(callOptions, llms.WithTemperature(1.0)) |
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Is this the temp we're using elsewhere? Feels really high. If nothing else we might want this to be configurable.
| newToken, err := newCopilotToken(githubToken) | ||
| if err != nil { | ||
| // If Copilot token request fails, GitHub token might be expired | ||
| if strings.Contains(err.Error(), "status 401") || strings.Contains(err.Error(), "status 403") { |
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Any chance a nested error could cause this logic to break if it contains that text (possibly based on a user asking GHCP about "status 401")? Is it worth matching your entire line of text like strings.HasPrefix(err.Error(), "copilot API error (status 401):")?
Azure Dev CLI Install InstructionsInstall scriptsMacOS/Linux
bash: pwsh: WindowsPowerShell install MSI install Standalone Binary
MSI
Documentationlearn.microsoft.com documentationtitle: Azure Developer CLI reference
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hemarina
reviewed
Oct 14, 2025
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Overview
This PR adds GitHub Copilot as a new LLM backend for the Azure Developer CLI (azd) agent, enabling developers to use GitHub Copilot's language models for AI-assisted development workflows within azd.
Changes
Core Integration
pkg/llm/github_copilot.go): Complete implementation of GitHub Copilot as an LLM backendAuthentication Flow
The implementation includes a complete OAuth device flow authentication system:
Technical Implementation Details
OpenAI API Reuse
We reuse the OpenAI model structure from langchaingo because:
Token Management Strategy
~/.azd/gh-cp/gh(JSON format)~/.azd/gh-cp/cp(JSON format with expiration)Integration Points
cmd/container.go): Registers the new provider as "github-copilot"internal/agent/agent_factory.go): Updates context handling for authenticationcmd/init.go): Enables GitHub Copilot for AI-assisted project initializationpkg/llm/model_factory.go): Adds context parameter for authentication flowspkg/llm/manager.go): Adds new LlmTypeGhCp constant and string representationSecurity Considerations
Benefits for azd Users
Resolves
Closes #5679 - Copilot integration
Testing
Configuration Example
Users can configure GitHub Copilot as their default LLM backend:
azd config set ai.model.type github-copilotThe first time they use an AI-assisted command, they'll be prompted to authenticate with GitHub, after which tokens are automatically managed.