fix(foundry): label Anthropic Messages onboarding

extensions/microsoft-foundry/auth.ts

@@ -26,6 +26,7 @@ import {
 } from "./onboard.js";
 import {
   buildFoundryAuthResult,
+  formatFoundryApiLabel,
   type FoundryProviderApi,
   isFoundryMaiImageModel,
   listConfiguredFoundryProfileIds,
@@ -154,7 +155,7 @@ export const entraIdAuthMethod: ProviderAuthMethod = {
             `Endpoint: ${endpoint}`,
             `Deployment: ${modelId}`,
             selectedDeployment.modelName ? `Model: ${selectedDeployment.modelName}` : undefined,
-            `API: ${api === "openai-responses" ? "Responses" : "Chat Completions"}`,
+            `API: ${formatFoundryApiLabel(api)}`,
           ]
             .filter(Boolean)
             .join("\n"),

extensions/microsoft-foundry/index.test.ts

@@ -18,6 +18,7 @@ import {
   COGNITIVE_SERVICES_RESOURCE,
   FOUNDRY_ANTHROPIC_SCOPE,
   buildFoundryAuthResult,
+  formatFoundryApiLabel,
   isAnthropicFoundryDeployment,
   isFoundryMaiImageModel,
   normalizeFoundryEndpoint,
@@ -841,6 +842,12 @@ describe("microsoft-foundry plugin", () => {
     expect(isFoundryMaiImageModel("MAI-DS-R1")).toBe(false);
   });
 
+  it("labels all Foundry API surfaces for onboarding summaries", () => {
+    expect(formatFoundryApiLabel("openai-completions")).toBe("Chat Completions");
+    expect(formatFoundryApiLabel("openai-responses")).toBe("Responses");
+    expect(formatFoundryApiLabel("anthropic-messages")).toBe("Anthropic Messages");
+  });
+
   it("records MAI chat deployments with reasoning-content token limits", () => {
     const result = buildFoundryAuthResult({
       profileId: "microsoft-foundry:entra",

extensions/microsoft-foundry/shared.ts

@@ -332,6 +332,17 @@ export function isFoundryProviderApi(value?: string | null): value is FoundryPro
   return value === DEFAULT_API || value === DEFAULT_GPT5_API || value === ANTHROPIC_MESSAGES_API;
 }
 
+export function formatFoundryApiLabel(api: FoundryProviderApi): string {
+  switch (api) {
+    case DEFAULT_GPT5_API:
+      return "Responses";
+    case ANTHROPIC_MESSAGES_API:
+      return "Anthropic Messages";
+    case DEFAULT_API:
+      return "Chat Completions";
+  }
+}
+
 export function normalizeFoundryEndpoint(endpoint: string): string {
   const trimmed = normalizeOptionalString(endpoint) ?? "";
   if (!trimmed) {