fix(stage-ui): fix the anthropic validation failure due to not able to fetch models list (#734)

packages/stage-ui/src/stores/providers.ts

@@ -950,10 +950,36 @@ export const useProvidersStore = defineStore('providers', () => {
       description: 'anthropic.com',
       defaultBaseUrl: 'https://api.anthropic.com/v1/',
       creator: createAnthropic,
-      validation: ['health', 'model_list'],
+      validation: ['health'],
       additionalHeaders: {
         'anthropic-dangerous-direct-browser-access': 'true',
       },
+      capabilities: {
+        // This is a hardcoded list of Anthropic models to work around issues with
+        // fetching the model list directly from their API via browser.
+        // See: https://github.com/moeru-ai/airi/issues/729
+        // This list should be periodically updated based on Anthropic's official documentation:
+        // https://docs.anthropic.com/en/docs/models-overview
+        // Some legacy models are not listed here.
+        listModels: async () => {
+          return [{
+            id: 'claude-haiku-4-5-20251001',
+            name: 'Claude Haiku 4.5',
+            provider: 'anthropic',
+            description: 'Anthropic fastest model with near-frontier intelligence',
+          }, {
+            id: 'claude-sonnet-4-5-20250929',
+            name: 'Claude Sonnet 4.5',
+            provider: 'anthropic',
+            description: 'Anthropic smartest model for complex agents and coding',
+          }, {
+            id: 'claude-opus-4-1-20250805',
+            name: 'Claude Opus 4.1',
+            provider: 'anthropic',
+            description: 'Exceptional model for specialized reasoning tasks',
+          }] satisfies ModelInfo[]
+        },
+      },
     }),
     'google-generative-ai': buildOpenAICompatibleProvider({
       id: 'google-generative-ai',

packages/stage-ui/src/stores/providers/openai-compatible-builder.ts

@@ -167,6 +167,19 @@ export function buildOpenAICompatibleProvider(
         }
         catch (e) {
           logWarn(`Model auto-detection failed: ${(e as Error).message}`)
+          logWarn('Falling back to default test model for validation checks.')
+          try {
+            if (capabilities?.listModels) {
+              const models = await capabilities.listModels(config)
+              if (models.length <= 0) {
+                throw new Error('No models returned from capabilities.listModels')
+              }
+              return models[0].id
+            }
+          }
+          catch (e) {
+            logWarn(`Model auto-detection via capabilities.listModels also failed: ${(e as Error).message}`)
+          }
         }
         return detected
       })()
@@ -276,12 +289,12 @@ export function buildOpenAICompatibleProvider(
     validators: finalValidators,
     ...(resolvedCategory === 'transcription'
       ? {
-          transcriptionFeatures: transcriptionFeatures ?? {
-            supportsGenerate: true,
-            supportsStreamOutput: false,
-            supportsStreamInput: false,
-          },
-        }
+        transcriptionFeatures: transcriptionFeatures ?? {
+          supportsGenerate: true,
+          supportsStreamOutput: false,
+          supportsStreamInput: false,
+        },
+      }
       : {}),
     ...rest,
   } as ProviderMetadata