feat(llm): add OpenRouter API client with error handling and timeout

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-08 16:21:26 +00:00
parent 5f5bf24d64
commit cf403250e0
2 changed files with 180 additions and 0 deletions
@@ -0,0 +1,51 @@
+import type { LlmConfig } from '../config/llmConfig.js';
+import type { RenderedPrompt } from './promptTemplate.js';
+
+const OPENROUTER_URL = 'https://openrouter.ai/api/v1/chat/completions';
+
+export interface CompletionRequest extends RenderedPrompt {
+  maxTokens?: number;
+  temperature?: number;
+}
+
+export interface OpenRouterClient {
+  complete(request: CompletionRequest): Promise<string | null>;
+}
+
+export function createOpenRouterClient(config: LlmConfig): OpenRouterClient {
+  return {
+    async complete(request: CompletionRequest): Promise<string | null> {
+      try {
+        const response = await fetch(OPENROUTER_URL, {
+          method: 'POST',
+          signal: AbortSignal.timeout(config.timeoutMs),
+          headers: {
+            'Authorization': `Bearer ${config.apiKey}`,
+            'Content-Type': 'application/json',
+          },
+          body: JSON.stringify({
+            model: config.model,
+            max_tokens: request.maxTokens ?? config.maxTokens,
+            temperature: request.temperature ?? config.temperature,
+            messages: [
+              { role: 'system', content: request.system },
+              { role: 'user', content: request.user },
+            ],
+          }),
+        });
+
+        if (!response.ok) {
+          console.warn(`OpenRouter API error: ${response.status} ${response.statusText}`);
+          return null;
+        }
+
+        const data = await response.json();
+        const content = data?.choices?.[0]?.message?.content;
+        return content ?? null;
+      } catch (error) {
+        console.warn('OpenRouter request failed:', (error as Error).message);
+        return null;
+      }
+    },
+  };
+}