models: add synthetic provider

src/daemon/models.ts

@@ -1,5 +1,5 @@
 import type { Config, ModelConfig } from '../config/index.js';
-import { AnthropicClient, OpenAIClient, OllamaClient, LlamaCppClient, GeminiClient, BedrockClient, GitHubModelsClient, ModelRouter, DEFAULT_RETRY_CONFIG } from '../models/index.js';
+import { AnthropicClient, OpenAIClient, OllamaClient, LlamaCppClient, GeminiClient, BedrockClient, GitHubModelsClient, SyntheticClient, ModelRouter, DEFAULT_RETRY_CONFIG } from '../models/index.js';
 import type { ModelClient, RetryConfig, ModelTier } from '../models/index.js';
 import { logger } from '../logger.js';
 import { getZaiApiKey } from '../auth/zai.js';
@@ -132,6 +132,8 @@ export function createClientFromConfig(cfg: ModelConfig): ModelClient {
           });
         },
       });
+    case 'synthetic':
+      return new SyntheticClient({ model: cfg.model });
     default:
       throw new Error(`Unknown model provider: ${(cfg as Record<string, unknown>).provider}`);
   }