fix(core): tolerate model catalog fetch failure

packages/core/src/models-dev.ts

@@ -228,7 +228,13 @@ const layer = Layer.effect(
         }),
       )
       return JSON.parse(text) as Record<string, Provider>
-    }).pipe(Effect.withSpan("ModelsDev.populate"), Effect.orDie)
+    }).pipe(
+      Effect.withSpan("ModelsDev.populate"),
+      Effect.catch((error) =>
+        Effect.logError("Failed to fetch models.dev", { error }).pipe(Effect.as({} as Record<string, Provider>)),
+      ),
+      Effect.orDie,
+    )
 
     const [cachedGet, invalidate] = yield* Effect.cachedInvalidateWithTTL(populate, Duration.infinity)
 

packages/core/test/models.test.ts

@@ -176,6 +176,25 @@ describe("ModelsDev Service", () => {
     }),
   )
 
+  it.live("get() returns an empty catalog when the initial fetch fails", () =>
+    Effect.gen(function* () {
+      const state = yield* Ref.make({ ...initialState, status: 503 })
+      const context = yield* Layer.build(buildLayer(state))
+      const result = yield* Effect.acquireUseRelease(
+        Effect.sync(() => {
+          Flag.OPENCODE_DISABLE_MODELS_FETCH = false
+        }),
+        () => ModelsDev.Service.use((s) => s.get()).pipe(Effect.provide(context)),
+        () =>
+          Effect.sync(() => {
+            Flag.OPENCODE_DISABLE_MODELS_FETCH = true
+          }),
+      )
+      expect(result).toEqual({})
+      expect((yield* Ref.get(state)).calls.length).toBe(3)
+    }),
+  )
+
   it.live("get() is single-flight under concurrent calls", () =>
     Effect.gen(function* () {
       yield* writeCache(fixture)