refactor(registry): B2 migrate to LiteLLM-style schema — unified models[] with kind field

- 71 registry files: flat `media.*Config.models` → `models[]` with `kind` field
- `media` wrapper removed → serviceKinds, *Config fields promoted top-level
- `type` field renamed to `kind` (llm/image/tts/stt/embedding/embedding/video/music)
- providers/index.js: PROVIDER_MEDIA now built from flat top-level media fields
- shared/constants/providers.js: buildProviderEntry reads flat top-level media fields
- route /v1/models: modelKind() uses kind||type; removed subConfig merge block
- models/info route: removed sub-config fallback lookup (all models in PROVIDER_MODELS)
- ttsProviders/index.js: synthesizeViaConfig reads tts models from PROVIDER_MODELS
- test-models route, helpers.js, validate route: kind||type compat
- Baselines: PROVIDERS 62/62 ✅, Alias 90/90 ✅

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

open-sse/providers/registry/antigravity.js

@@ -4,54 +4,43 @@ import { ANTIGRAVITY_OAUTH_CLIENT } from "../shared.js";
 export default {
   id: "antigravity",
   alias: "ag",
+  uiAlias: "ag",
   display: {
-      "name": "Antigravity",
-      "icon": "rocket_launch",
-      "color": "#F59E0B",
-      "website": "https://antigravity.google",
-      "notice": {
-          "signupUrl": "https://antigravity.google"
-      },
-      "deprecated": true,
-      "deprecationNotice": "RISK_NOTICE"
+    name: "Antigravity",
+    icon: "rocket_launch",
+    color: "#F59E0B",
+    website: "https://antigravity.google",
+    notice: {
+      signupUrl: "https://antigravity.google",
+    },
+    deprecated: true,
+    deprecationNotice: "RISK_NOTICE",
   },
   category: "oauth",
-  uiAlias: "ag",
   transport: {
     baseUrls: [
       "https://daily-cloudcode-pa.googleapis.com",
-      "https://daily-cloudcode-pa.sandbox.googleapis.com"
+      "https://daily-cloudcode-pa.sandbox.googleapis.com",
     ],
     format: "antigravity",
-    headers: { "User-Agent": `antigravity/1.107.0 ${platform()}/${arch()}` },
-    // 429/503 use computeRetryDelay hook (Retry-After header/body → cap, else backoff)
-    retry: { 429: { attempts: 6 }, 503: { attempts: 3 } },
+    headers: {
+      "User-Agent": "antigravity/1.107.0 darwin/arm64",
+    },
+    retry: {
+      "429": {
+        attempts: 6,
+      },
+      "503": {
+        attempts: 3,
+      },
+    },
     usage: {
       quotaApiUrl: "https://cloudcode-pa.googleapis.com/v1internal:fetchAvailableModels",
       loadProjectApiUrl: "https://cloudcode-pa.googleapis.com/v1internal:loadCodeAssist",
-      tokenUrl: "https://oauth2.googleapis.com/token"
+      tokenUrl: "https://oauth2.googleapis.com/token",
     },
-    ...ANTIGRAVITY_OAUTH_CLIENT
-  },
-  oauth: {
-    authorizeUrl: "https://accounts.google.com/o/oauth2/v2/auth",
-    tokenUrl: "https://oauth2.googleapis.com/token",
-    userInfoUrl: "https://www.googleapis.com/oauth2/v1/userinfo",
-    scopes: [
-      "https://www.googleapis.com/auth/cloud-platform",
-      "https://www.googleapis.com/auth/userinfo.email",
-      "https://www.googleapis.com/auth/userinfo.profile",
-      "https://www.googleapis.com/auth/cclog",
-      "https://www.googleapis.com/auth/experimentsandconfigs"
-    ],
-    apiEndpoint: "https://cloudcode-pa.googleapis.com",
-    apiVersion: "v1internal",
-    loadCodeAssistEndpoint: "https://cloudcode-pa.googleapis.com/v1internal:loadCodeAssist",
-    onboardUserEndpoint: "https://cloudcode-pa.googleapis.com/v1internal:onboardUser",
-    loadCodeAssistUserAgent: "google-api-nodejs-client/9.15.1",
-    loadCodeAssistApiClient: "google-cloud-sdk vscode_cloudshelleditor/0.1"
-  ,
-    refreshLeadMs: 300000
+    clientId: "1071006060591-tmhssin2h21lcre235vtolojh4g403ep.apps.googleusercontent.com",
+    clientSecret: "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",
   },
   models: [
     { id: "gemini-3-flash-agent", name: "Gemini 3.5 Flash (High)" },
@@ -62,7 +51,28 @@ export default {
     { id: "claude-sonnet-4-6", name: "Claude Sonnet 4.6 (Thinking)" },
     { id: "claude-opus-4-6-thinking", name: "Claude Opus 4.6 (Thinking)" },
     { id: "gpt-oss-120b-medium", name: "GPT-OSS 120B (Medium)" },
-    { id: "gemini-3-flash", name: "Gemini 3 Flash", thinking: false }
+    { id: "gemini-3-flash", name: "Gemini 3 Flash", thinking: false },
   ],
-  features: {"usage":true},
+  oauth: {
+    authorizeUrl: "https://accounts.google.com/o/oauth2/v2/auth",
+    tokenUrl: "https://oauth2.googleapis.com/token",
+    userInfoUrl: "https://www.googleapis.com/oauth2/v1/userinfo",
+    scopes: [
+      "https://www.googleapis.com/auth/cloud-platform",
+      "https://www.googleapis.com/auth/userinfo.email",
+      "https://www.googleapis.com/auth/userinfo.profile",
+      "https://www.googleapis.com/auth/cclog",
+      "https://www.googleapis.com/auth/experimentsandconfigs",
+    ],
+    apiEndpoint: "https://cloudcode-pa.googleapis.com",
+    apiVersion: "v1internal",
+    loadCodeAssistEndpoint: "https://cloudcode-pa.googleapis.com/v1internal:loadCodeAssist",
+    onboardUserEndpoint: "https://cloudcode-pa.googleapis.com/v1internal:onboardUser",
+    loadCodeAssistUserAgent: "google-api-nodejs-client/9.15.1",
+    loadCodeAssistApiClient: "google-cloud-sdk vscode_cloudshelleditor/0.1",
+    refreshLeadMs: 300000,
+  },
+  features: {
+    usage: true,
+  },
 };