Add default to model selection (#6867)

Signed-off-by: trangevi <trangevi@microsoft.com>

Author: trangevi

cli/azd/extensions/azure.ai.agents/go.mod

@@ -11,14 +11,15 @@ require (
 	github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/containerregistry/armcontainerregistry v1.2.0
 	github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/resources/armresources v1.2.0
 	github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/resources/armsubscriptions v1.3.0
-	github.com/azure/azure-dev/cli/azd v0.0.0-20260210235925-af2fc5ae4ef3
+	github.com/azure/azure-dev/cli/azd v0.0.0-20260224205151-b93bd2358391
 	github.com/braydonk/yaml v0.9.0
 	github.com/drone/envsubst v1.0.3
 	github.com/fatih/color v1.18.0
 	github.com/google/uuid v1.6.0
 	github.com/mark3labs/mcp-go v0.41.1
 	github.com/spf13/cobra v1.10.1
 	github.com/spf13/pflag v1.0.10
+	github.com/stretchr/testify v1.11.1
 	go.yaml.in/yaml/v3 v3.0.4
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20251007200510-49b9836ed3ff
 	google.golang.org/grpc v1.76.0
@@ -80,7 +81,6 @@ require (
 	github.com/santhosh-tekuri/jsonschema/v6 v6.0.2 // indirect
 	github.com/sethvargo/go-retry v0.3.0 // indirect
 	github.com/spf13/cast v1.10.0 // indirect
-	github.com/stretchr/testify v1.11.1 // indirect
 	github.com/theckman/yacspin v0.13.12 // indirect
 	github.com/wk8/go-ordered-map/v2 v2.1.8 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect

cli/azd/extensions/azure.ai.agents/go.sum

@@ -53,8 +53,8 @@ github.com/aymanbagabas/go-udiff v0.2.0 h1:TK0fH4MteXUDspT88n8CKzvK0X9O2xu9yQjWp
 github.com/aymanbagabas/go-udiff v0.2.0/go.mod h1:RE4Ex0qsGkTAJoQdQQCA0uG+nAzJO/pI/QwceO5fgrA=
 github.com/aymerick/douceur v0.2.0 h1:Mv+mAeH1Q+n9Fr+oyamOlAkUNPWPlA8PPGR0QAaYuPk=
 github.com/aymerick/douceur v0.2.0/go.mod h1:wlT5vV2O3h55X9m7iVYN0TBM0NH/MmbLnd30/FjWUq4=
-github.com/azure/azure-dev/cli/azd v0.0.0-20260210235925-af2fc5ae4ef3 h1:c9y1yqY7GiVG+yLqemPCXh+jm2rQuDOBUEUR1OKuIE4=
-github.com/azure/azure-dev/cli/azd v0.0.0-20260210235925-af2fc5ae4ef3/go.mod h1:4gxguvyC2AMKdookMDH1H6fYgtH9ogNb1BIx9WfeINM=
+github.com/azure/azure-dev/cli/azd v0.0.0-20260224205151-b93bd2358391 h1:Bne02NiVUFZXUid7kt37l6qYgGKN6T/Rus0qjrGjTHg=
+github.com/azure/azure-dev/cli/azd v0.0.0-20260224205151-b93bd2358391/go.mod h1:PpDDtoX9qleMXzyDEblT5DeOWoJ/gvLsvIJ4z2fKpOE=
 github.com/bahlo/generic-list-go v0.2.0 h1:5sz/EEAK+ls5wF+NeqDpk5+iNdMDXrh3z3nPnH1Wvgk=
 github.com/bahlo/generic-list-go v0.2.0/go.mod h1:2KvAjgMlE5NNynlg/5iLrrCCZ2+5xWbdbCW3pNTGyYg=
 github.com/benbjohnson/clock v1.3.5 h1:VvXlSJBzZpA/zum6Sj74hxwYI2DIxRWuNIoXAzHZz5o=

cli/azd/extensions/azure.ai.agents/internal/cmd/init_from_code.go

@@ -858,6 +858,7 @@ func (a *InitFromCodeAction) selectNewModel(ctx context.Context) (*azdext.AiMode
 		Filter: &azdext.AiModelFilterOptions{
 			Locations: []string{a.azureContext.Scope.Location},
 		},
+		DefaultValue: "gpt-4.1-mini",
 	}
 
 	modelResp, err := a.azdClient.Prompt().PromptAiModel(ctx, promptReq)