feat(kimchi): add Kimchi OAuth provider support

Add Kimchi as a browser-token OAuth provider routed through its
OpenAI-compatible gateway. Discover live models for /v1/models and
provider models, normalize Claude-compatible requests, and wire up
provider connection tests.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/api/providers/[id]/models/route.js

@@ -4,7 +4,9 @@ import { isOpenAICompatibleProvider, isAnthropicCompatibleProvider } from "@/sha
 import { GEMINI_CONFIG } from "@/lib/oauth/constants/oauth";
 import { refreshGoogleToken, updateProviderCredentials } from "@/sse/services/tokenRefresh";
 import { resolveOllamaLocalHost } from "open-sse/config/providers.js";
+import { getModelsByProviderId } from "open-sse/config/providerModels.js";
 import { resolveKiroModels } from "open-sse/services/kiroModels.js";
+import { resolveKimchiModels } from "open-sse/services/kimchiModels.js";
 import { resolveQoderModels } from "open-sse/services/qoderModels.js";
 
 const GEMINI_CLI_MODELS_URL = "https://cloudcode-pa.googleapis.com/v1internal:fetchAvailableModels";
@@ -79,6 +81,13 @@ const resolveQwenModelsUrl = (connection) => {
   return `https://${value.replace(/\/$/, "")}/v1/models`;
 };
 
+const getStaticProviderModels = (providerId) =>
+  getModelsByProviderId(providerId).map((model) => ({
+    ...model,
+    id: model.id,
+    name: model.name || model.id,
+  }));
+
 // Generic custom resolver for OAuth providers that need refresh-on-401 + token persist.
 // Receives a `fetchFn(token)` and returns parsed models or throws.
 const buildOAuthResolver = ({ refreshFn, fetchFn, parseFn, errorLabel }) => async (connection) => {
@@ -241,6 +250,22 @@ const PROVIDER_MODELS_CONFIG = {
   nvidia: createOpenAIModelsConfig("https://integrate.api.nvidia.com/v1/models"),
   assemblyai: createOpenAIModelsConfig("https://api.assemblyai.com/v1/models"),
   "vercel-ai-gateway": createOpenAIModelsConfig("https://ai-gateway.vercel.sh/v1/models"),
+  kimchi: {
+    customResolver: async (connection) => {
+      const result = await resolveKimchiModels({
+        accessToken: connection.accessToken,
+        apiKey: connection.apiKey,
+        providerSpecificData: connection.providerSpecificData || {},
+      }, { forceRefresh: true, log: console });
+      if (result?.models?.length) {
+        return { models: result.models };
+      }
+      return {
+        models: getStaticProviderModels("kimchi"),
+        warning: "Kimchi returned no live models; falling back to static catalog.",
+      };
+    }
+  },
 
   // Custom resolvers (non-OpenAI-shaped APIs / token-refresh flows)
   kiro: {

src/app/api/providers/[id]/test/testUtils.js

@@ -16,6 +16,7 @@ import {
   CLAUDE_CONFIG,
   CLINE_CONFIG,
   KILOCODE_CONFIG,
+  KIMCHI_CONFIG,
 } from "@/lib/oauth/constants/oauth";
 import { buildClineHeaders } from "@/shared/utils/clineAuth";
 
@@ -91,6 +92,17 @@ const OAUTH_TEST_CONFIG = {
     authPrefix: "Bearer ",
   },
   "codebuddy-cn": { tokenExists: true },
+  kimchi: {
+    url: KIMCHI_CONFIG.validationUrl || "https://api.cast.ai/v1/llm/openai/supported-providers",
+    method: "GET",
+    authHeader: "Authorization",
+    authPrefix: "Bearer ",
+    extraHeaders: {
+      Accept: "application/json",
+      "User-Agent": "kimchi/0.0.0",
+    },
+    refreshable: false,
+  },
 };
 
 async function probeClineAccessToken(accessToken) {