Phase 1: Add Copilot SDK foundation alongside existing langchaingo agent

cli/azd/cmd/container.go

@@ -581,10 +581,16 @@ func registerCommonDependencies(container *ioc.NestedContainer) {
 	// AI & LLM components
 	container.MustRegisterSingleton(llm.NewManager)
 	container.MustRegisterSingleton(llm.NewModelFactory)
+	container.MustRegisterSingleton(llm.NewSessionConfigBuilder)
+	container.MustRegisterSingleton(func() *llm.CopilotClientManager {
+		return llm.NewCopilotClientManager(nil)
+	})
+	container.MustRegisterScoped(agent.NewCopilotAgentFactory)
 	container.MustRegisterScoped(agent.NewAgentFactory)
 	container.MustRegisterScoped(consent.NewConsentManager)
 	container.MustRegisterNamedSingleton("ollama", llm.NewOllamaModelProvider)
 	container.MustRegisterNamedSingleton("azure", llm.NewAzureOpenAiModelProvider)
+	container.MustRegisterNamedSingleton("copilot", llm.NewCopilotProvider)
 	registerGitHubCopilotProvider(container)
 
 	// Agent security manager

cli/azd/cmd/init.go

@@ -648,7 +648,7 @@ func promptInitType(
 			console.Message(ctx, "\nThe azd agent feature has been enabled to support this new experience."+
 				" To turn off in the future run `azd config unset alpha.llm`.")
 
-			err = azdConfig.Set("ai.agent.model.type", "github-copilot")
+			err = azdConfig.Set("ai.agent.model.type", "copilot")
 			if err != nil {
 				return initUnknown, fmt.Errorf("failed to set ai.agent.model.type config: %w", err)
 			}

cli/azd/go.mod

@@ -109,8 +109,10 @@ require (
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/dlclark/regexp2 v1.11.5 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/github/copilot-sdk/go v0.1.26-preview.0 // indirect
 	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/google/jsonschema-go v0.4.2 // indirect
 	github.com/goph/emperror v0.17.2 // indirect
 	github.com/gorilla/css v1.0.1 // indirect
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2 // indirect

cli/azd/go.sum

@@ -194,6 +194,10 @@ github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8
 github.com/getsentry/raven-go v0.2.0/go.mod h1:KungGk8q33+aIAZUIVWZDr2OfAEBsO49PX4NzFV5kcQ=
 github.com/getzep/zep-go v1.0.4 h1:09o26bPP2RAPKFjWuVWwUWLbtFDF/S8bfbilxzeZAAg=
 github.com/getzep/zep-go v1.0.4/go.mod h1:HC1Gz7oiyrzOTvzeKC4dQKUiUy87zpIJl0ZFXXdHuss=
+github.com/github/copilot-sdk/go v0.1.25 h1:SJ/jSoesbpjDEBcvMkoCG+xITvgvnhxnd6oJdmNQnOs=
+github.com/github/copilot-sdk/go v0.1.25/go.mod h1:qc2iEF7hdO8kzSvbyGvrcGhuk2fzdW4xTtT0+1EH2ts=
+github.com/github/copilot-sdk/go v0.1.26-preview.0 h1:UErdFjDBUXGinDmc+J8KoVlmdXJkdqcx6D6pu3Na2GE=
+github.com/github/copilot-sdk/go v0.1.26-preview.0/go.mod h1:qc2iEF7hdO8kzSvbyGvrcGhuk2fzdW4xTtT0+1EH2ts=
 github.com/go-check/check v0.0.0-20180628173108-788fd7840127 h1:0gkP6mzaMqkmpcJYCFOLkIBwI7xFExG03bbkOkCvUPI=
 github.com/go-check/check v0.0.0-20180628173108-788fd7840127/go.mod h1:9ES+weclKsC9YodN5RgxqK/VD9HM9JsCSh7rNhMZE98=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
@@ -223,6 +227,8 @@ github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX
 github.com/google/go-querystring v1.1.0 h1:AnCroh3fv4ZBgVIf1Iwtovgjaw/GiKJo8M8yD/fhyJ8=
 github.com/google/go-querystring v1.1.0/go.mod h1:Kcdr2DB4koayq7X8pmAG4sNG59So17icRSOU623lUBU=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/google/jsonschema-go v0.4.2 h1:tmrUohrwoLZZS/P3x7ex0WAVknEkBZM46iALbcqoRA8=
+github.com/google/jsonschema-go v0.4.2/go.mod h1:r5quNTdLOYEz95Ru18zA0ydNbBuYoo9tgaYcxEYhJVE=
 github.com/google/s2a-go v0.1.9 h1:LGD7gtMgezd8a/Xak7mEWL0PjoTQFvpRudN895yqKW0=
 github.com/google/s2a-go v0.1.9/go.mod h1:YA0Ei2ZQL3acow2O62kdp9UlnvMmU7kA6Eutn0dXayM=
 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
@@ -264,6 +270,7 @@ github.com/keybase/go-keychain v0.0.1 h1:way+bWYa6lDppZoZcgMbYsvC7GxljxrskdNInRt
 github.com/keybase/go-keychain v0.0.1/go.mod h1:PdEILRW3i9D8JcdM+FmY6RwkHGnhHxXwkPPMeUgOK1k=
 github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
 github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
+github.com/klauspost/compress v1.18.3 h1:9PJRvfbmTabkOX8moIpXPbMMbYN60bWImDDU7L+/6zw=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=

cli/azd/internal/agent/agent_factory.go

@@ -22,10 +22,11 @@ import (
 
 // AgentFactory is responsible for creating agent instances
 type AgentFactory struct {
-	consentManager  consent.ConsentManager
-	llmManager      *llm.Manager
-	console         input.Console
-	securityManager *security.Manager
+	consentManager       consent.ConsentManager
+	llmManager           *llm.Manager
+	console              input.Console
+	securityManager      *security.Manager
+	copilotAgentFactory  *CopilotAgentFactory
 }
 
 // NewAgentFactory creates a new instance of AgentFactory
@@ -34,17 +35,36 @@ func NewAgentFactory(
 	console input.Console,
 	llmManager *llm.Manager,
 	securityManager *security.Manager,
+	copilotAgentFactory *CopilotAgentFactory,
 ) *AgentFactory {
 	return &AgentFactory{
-		consentManager:  consentManager,
-		llmManager:      llmManager,
-		console:         console,
-		securityManager: securityManager,
+		consentManager:      consentManager,
+		llmManager:          llmManager,
+		console:             console,
+		securityManager:     securityManager,
+		copilotAgentFactory: copilotAgentFactory,
 	}
 }
 
 // CreateAgent creates a new agent instance
 func (f *AgentFactory) Create(ctx context.Context, opts ...AgentCreateOption) (Agent, error) {
+	// Check if the configured model type is 'copilot' — if so, delegate to CopilotAgentFactory
+	defaultModelContainer, err := f.llmManager.GetDefaultModel(ctx)
+	if err == nil && defaultModelContainer.Type == llm.LlmTypeCopilot {
+		log.Println("[agent-factory] Model type is 'copilot', delegating to CopilotAgentFactory")
+		copilotOpts := []CopilotAgentOption{}
+		for _, opt := range opts {
+			base := &agentBase{}
+			opt(base)
+			if base.debug {
+				copilotOpts = append(copilotOpts, WithCopilotDebug(true))
+			}
+		}
+		return f.copilotAgentFactory.Create(ctx, copilotOpts...)
+	}
+
+	log.Printf("[agent-factory] Using langchaingo agent (model type: %s)", defaultModelContainer.Type)
+
 	cleanupTasks := map[string]func() error{}
 
 	cleanup := func() error {
@@ -77,7 +97,7 @@ func (f *AgentFactory) Create(ctx context.Context, opts ...AgentCreateOption) (A
 	}
 
 	// Default model gets the chained handler to expose the UX experience for the agent
-	defaultModelContainer, err := f.llmManager.GetDefaultModel(ctx, llm.WithLogger(chainedHandler))
+	defaultModelContainer, err = f.llmManager.GetDefaultModel(ctx, llm.WithLogger(chainedHandler))
 	if err != nil {
 		defer cleanup()
 		return nil, err