feat(FN-5601): add OpenAI Responses API type support to custom providers

Added OpenAI Responses API as a new custom provider type, wiring `apiType: "responses"` through the core registry, engine routes, and dashboard UI with a dropdown selector; includes test coverage across the registry, routes, and component layers.

Fusion-Task-Id: FN-5601

Co-authored-by: Fusion (runfusion.ai) <noreply@runfusion.ai>
Fusion-Task-Id: FN-5601

packages/cli/src/commands/__tests__/custom-provider-registry.test.ts

@@ -10,6 +10,7 @@ describe("custom-provider-registry", () => {
   it.each([
     ["openai-compatible", "openai-completions"],
     ["anthropic-compatible", "anthropic"],
+    ["openai-responses", "openai-responses"],
   ])("resolveApiType maps %s -> %s", (apiType, expectedApi) => {
     expect(resolveApiType(apiType)).toBe(expectedApi);
   });
@@ -20,7 +21,7 @@ describe("custom-provider-registry", () => {
     const logFn = vi.fn();
     const providers: CustomProvider[] = [
       {
-        id: "openai-custom",
+        id: "550e8400-e29b-41d4-a716-446655440000",
         name: "OpenAI Custom",
         apiType: "openai-compatible",
         baseUrl: "https://example.test/v1",
@@ -28,7 +29,7 @@ describe("custom-provider-registry", () => {
         models: [{ id: "m1", name: "Model 1" }],
       },
       {
-        id: "anthropic-custom",
+        id: "660e8400-e29b-41d4-a716-446655440001",
         name: "Anthropic Custom",
         apiType: "anthropic-compatible",
         baseUrl: "https://anthropic.test",
@@ -54,6 +55,34 @@ describe("custom-provider-registry", () => {
     expect(refresh).toHaveBeenCalledTimes(1);
   });
 
+  it("uses slugified provider names and collision suffixes for registry keys", () => {
+    const registerProvider = vi.fn();
+    const refresh = vi.fn();
+
+    registerCustomProviders(
+      { registerProvider, refresh },
+      [
+        {
+          id: "dd0e8400-e29b-41d4-a716-446655440008",
+          name: "My AI Provider",
+          apiType: "openai-compatible",
+          baseUrl: "https://one.test",
+        },
+        {
+          id: "ee0e8400-e29b-41d4-a716-446655440009",
+          name: "My AI Provider",
+          apiType: "openai-compatible",
+          baseUrl: "https://two.test",
+        },
+      ],
+      vi.fn(),
+    );
+
+    expect(registerProvider).toHaveBeenNthCalledWith(1, "my-ai-provider", expect.any(Object));
+    expect(registerProvider).toHaveBeenNthCalledWith(2, "my-ai-provider-2", expect.any(Object));
+    expect(refresh).toHaveBeenCalledTimes(1);
+  });
+
   it("handles empty provider list and still refreshes", () => {
     const registerProvider = vi.fn();
     const refresh = vi.fn();
@@ -71,7 +100,7 @@ describe("custom-provider-registry", () => {
     registerCustomProviders(
       { registerProvider, refresh },
       [{
-        id: "no-models",
+        id: "770e8400-e29b-41d4-a716-446655440002",
         name: "No Models",
         apiType: "openai-compatible",
         baseUrl: "https://nomodels.test",
@@ -97,13 +126,13 @@ describe("custom-provider-registry", () => {
       { registerProvider, refresh },
       [
         {
-          id: "bad",
+          id: "880e8400-e29b-41d4-a716-446655440003",
           name: "Bad",
           apiType: "openai-compatible",
           baseUrl: "https://bad.test",
         },
         {
-          id: "good",
+          id: "990e8400-e29b-41d4-a716-446655440004",
           name: "Good",
           apiType: "openai-compatible",
           baseUrl: "https://good.test",
@@ -113,7 +142,7 @@ describe("custom-provider-registry", () => {
     );
 
     expect(registerProvider).toHaveBeenCalledTimes(2);
-    expect(logFn).toHaveBeenCalledWith(expect.stringContaining("Failed to register custom provider bad"));
+    expect(logFn).toHaveBeenCalledWith(expect.stringContaining("id=880e8400-e29b-41d4-a716-446655440003"));
     expect(refresh).toHaveBeenCalledTimes(1);
   });
 
@@ -123,10 +152,10 @@ describe("custom-provider-registry", () => {
 
     reregisterCustomProviders(
       { registerProvider, refresh },
-      [{ id: "old", name: "Old", apiType: "openai-compatible", baseUrl: "https://old.test" }],
+      [{ id: "aa0e8400-e29b-41d4-a716-446655440005", name: "Old", apiType: "openai-compatible", baseUrl: "https://old.test" }],
       [
-        { id: "old", name: "Old", apiType: "openai-compatible", baseUrl: "https://old.test" },
-        { id: "new", name: "New", apiType: "anthropic-compatible", baseUrl: "https://new.test" },
+        { id: "aa0e8400-e29b-41d4-a716-446655440005", name: "Old", apiType: "openai-compatible", baseUrl: "https://old.test" },
+        { id: "bb0e8400-e29b-41d4-a716-446655440006", name: "New", apiType: "anthropic-compatible", baseUrl: "https://new.test" },
       ],
       vi.fn(),
     );
@@ -142,13 +171,13 @@ describe("custom-provider-registry", () => {
 
     reregisterCustomProviders(
       { registerProvider, refresh },
-      [{ id: "same-id", name: "Provider", apiType: "openai-compatible", baseUrl: "https://one.test", apiKey: "A" }],
-      [{ id: "same-id", name: "Provider", apiType: "openai-compatible", baseUrl: "https://two.test", apiKey: "B" }],
+      [{ id: "cc0e8400-e29b-41d4-a716-446655440007", name: "Provider", apiType: "openai-compatible", baseUrl: "https://one.test", apiKey: "A" }],
+      [{ id: "cc0e8400-e29b-41d4-a716-446655440007", name: "Provider", apiType: "openai-compatible", baseUrl: "https://two.test", apiKey: "B" }],
       vi.fn(),
     );
 
     expect(registerProvider).toHaveBeenCalledTimes(1);
-    expect(registerProvider).toHaveBeenCalledWith("same-id", expect.objectContaining({
+    expect(registerProvider).toHaveBeenCalledWith("provider", expect.objectContaining({
       baseUrl: "https://two.test",
       apiKey: "B",
     }));

packages/cli/src/commands/custom-provider-registry.ts

@@ -1,4 +1,4 @@
-import type { CustomProvider } from "@fusion/core";
+import { customProviderRegistryKey, type CustomProvider } from "@fusion/core";
 
 interface ModelRegistryLike {
   registerProvider: (name: string, config: {
@@ -22,6 +22,9 @@ export function resolveApiType(apiType: string): string {
   if (apiType === "anthropic-compatible") {
     return "anthropic";
   }
+  if (apiType === "openai-responses") {
+    return "openai-responses";
+  }
   return "openai-completions";
 }
 
@@ -56,13 +59,15 @@ export function registerCustomProviders(
   customProviders: CustomProvider[] | undefined,
   logFn: (message: string) => void,
 ): void {
-  for (const provider of customProviders ?? []) {
+  const providers = customProviders ?? [];
+  for (const provider of providers) {
+    const registryKey = customProviderRegistryKey(provider, providers);
     try {
-      modelRegistry.registerProvider(provider.id, toProviderConfig(provider));
-      logFn(`Registered custom provider ${provider.id}`);
+      modelRegistry.registerProvider(registryKey, toProviderConfig(provider));
+      logFn(`Registered custom provider "${provider.name}" (key=${registryKey}, id=${provider.id})`);
     } catch (error) {
       const message = error instanceof Error ? error.message : String(error);
-      logFn(`Failed to register custom provider ${provider.id}: ${message}`);
+      logFn(`Failed to register custom provider "${provider.name}" (key=${registryKey}, id=${provider.id}): ${message}`);
     }
   }
 
@@ -76,19 +81,21 @@ export function reregisterCustomProviders(
   logFn: (message: string) => void,
 ): void {
   const previousById = new Map((previousProviders ?? []).map((provider) => [provider.id, provider]));
+  const providers = currentProviders ?? [];
 
-  for (const provider of currentProviders ?? []) {
+  for (const provider of providers) {
     const previous = previousById.get(provider.id);
     if (previous && !providersDiffer(previous, provider)) {
       continue;
     }
 
+    const registryKey = customProviderRegistryKey(provider, providers);
     try {
-      modelRegistry.registerProvider(provider.id, toProviderConfig(provider));
-      logFn(`${previous ? "Updated" : "Registered"} custom provider ${provider.id}`);
+      modelRegistry.registerProvider(registryKey, toProviderConfig(provider));
+      logFn(`${previous ? "Updated" : "Registered"} custom provider "${provider.name}" (key=${registryKey}, id=${provider.id})`);
     } catch (error) {
       const message = error instanceof Error ? error.message : String(error);
-      logFn(`Failed to register custom provider ${provider.id}: ${message}`);
+      logFn(`Failed to register custom provider "${provider.name}" (key=${registryKey}, id=${provider.id}): ${message}`);
     }
   }