fix(providers): stop probing a models endpoint Antigravity does not serve

The google-antigravity entry ships a static ANTIGRAVITY_MODELS catalog
but omitted liveModels. A missing value reads as live, so discovery
built ${baseUrl}/models against an endpoint that does not implement it
and reported permanent failure. Inference worked the whole time, which
is what made the false negative confusing: the provider was fine and the
dashboard said it was not.

liveModels: false makes the static branch engage at
catalog/provider-fetch.ts:451, and management reports discovery as
disabled rather than failed at management/provider-routes.ts:84,:90.

The regression test forces a credential-bearing path on purpose. The
no-token OAuth fallback would short-circuit before any probe and let the
test pass with the flag removed — vacuous. Ablated: without the flag it
fails with 1 probe where 0 are expected.

Registry flag only, cherry-picked from PR #744 by @luvs01. That PR also
reworks OAuth reconciliation and persisted provider settings, which is a
maintainer security-review surface and is deliberately not included.

Co-authored-by: luvs01 <luvs01@users.noreply.github.com>

Author: lidge-jun

src/providers/registry.ts

@@ -796,7 +796,7 @@ export const PROVIDER_REGISTRY: readonly ProviderRegistryEntry[] = [
   // 2026-07-10: defaultModel is frozen pending Vertex-specific Tier-2 evidence; Gemini API
   // evidence from ai.google.dev does not establish Vertex publisher availability.
   { id: "google-vertex", label: "Google Vertex AI", adapter: "google", baseUrl: "https://aiplatform.googleapis.com", authKind: "key", dashboardUrl: "https://console.cloud.google.com/vertex-ai", defaultModel: "gemini-3-pro", googleMode: "vertex", jawcodeBundle: "google", extraMetadataAliases: ["gemini-vertex"] },
-  { id: "google-antigravity", label: "Google Antigravity", adapter: "google", baseUrl: "https://daily-cloudcode-pa.googleapis.com", authKind: "oauth", dashboardUrl: "https://antigravity.google", models: ANTIGRAVITY_MODELS, defaultModel: "gemini-3.6-flash", modelContextWindows: ANTIGRAVITY_MODEL_CONTEXT_WINDOWS, modelReasoningEfforts: ANTIGRAVITY_MODEL_EFFORTS, googleMode: "cloud-code-assist", jawcodeBundle: "google", extraMetadataAliases: ["antigravity", "gemini-antigravity"] },
+  { id: "google-antigravity", label: "Google Antigravity", adapter: "google", baseUrl: "https://daily-cloudcode-pa.googleapis.com", authKind: "oauth", dashboardUrl: "https://antigravity.google", models: ANTIGRAVITY_MODELS, liveModels: false, defaultModel: "gemini-3.6-flash", modelContextWindows: ANTIGRAVITY_MODEL_CONTEXT_WINDOWS, modelReasoningEfforts: ANTIGRAVITY_MODEL_EFFORTS, googleMode: "cloud-code-assist", jawcodeBundle: "google", extraMetadataAliases: ["antigravity", "gemini-antigravity"] },
   { id: "azure-openai", label: "Azure OpenAI", adapter: "azure-openai", baseUrl: "https://{resource}.openai.azure.com/openai", authKind: "key", featured: true, dashboardUrl: "https://portal.azure.com" },
   { id: "ollama", label: "Ollama (local)", adapter: "openai-chat", baseUrl: "http://localhost:11434/v1", authKind: "local", allowPrivateNetworkByDefault: true, allowBaseUrlOverride: true, featured: true, note: "Local — key usually blank" },
   { id: "vllm", label: "vLLM (local)", adapter: "openai-chat", baseUrl: "http://localhost:8000/v1", authKind: "local", allowPrivateNetworkByDefault: true, allowBaseUrlOverride: true, featured: true, note: "Local — key usually blank" },

tests/antigravity-static-catalog.test.ts

@@ -0,0 +1,38 @@
+import { afterEach, describe, expect, test } from "bun:test";
+import { gatherRoutedModels } from "../src/codex/catalog";
+import { clearModelCache } from "../src/codex/model-cache";
+import { providerConfigSeed } from "../src/providers/derive";
+import { PROVIDER_REGISTRY } from "../src/providers/registry";
+import { withStubbedProviderFetch } from "./helpers/catalog-provider-fetch";
+
+const originalFetch = globalThis.fetch;
+
+afterEach(() => {
+  globalThis.fetch = originalFetch;
+  clearModelCache("google-antigravity");
+});
+
+describe("Google Antigravity static catalog", () => {
+  test("registry seed surfaces its static models without live discovery", async () => {
+    const entry = PROVIDER_REGISTRY.find(provider => provider.id === "google-antigravity")!;
+    const staticModels = entry.models!;
+    let fetchCalls = 0;
+    globalThis.fetch = (() => {
+      fetchCalls += 1;
+      return Promise.resolve(Response.json({ data: [{ id: "unexpected-live-model" }] }));
+    }) as typeof fetch;
+
+    const models = await gatherRoutedModels(withStubbedProviderFetch({
+      providers: {
+        "google-antigravity": {
+          ...providerConfigSeed(entry),
+          authMode: "key",
+          apiKey: "test-token",
+        },
+      },
+    }));
+
+    expect(fetchCalls).toBe(0);
+    expect(models.filter(model => model.provider === entry.id).map(model => model.id).sort()).toEqual([...staticModels].sort());
+  });
+});