fix(proxy): route Claude Code CLI requests on /v1/chat/completions to Anthropic handler (#61)

* fix(proxy): route Claude models from chat completions to anthropic handler

* style(proxy): minor formatting cleanup

src/server/modules/proxy/proxy.controller.ts

@@ -44,6 +44,24 @@ export class ProxyController {
   @Post('chat/completions')
   async chatCompletions(@Body() body: OpenAIChatRequest, @Res() res: FastifyReply) {
     try {
+      // Claude Code CLI compatibility:
+      // Claude CLI uses OpenAI-style /v1/chat/completions
+      if (body.model?.startsWith('claude-')) {
+        const result = await this.proxyService.handleAnthropicMessages(
+          body as unknown as AnthropicChatRequest,
+        );
+
+        if (body.stream && result instanceof Observable) {
+          res.header('Content-Type', 'text/event-stream');
+          res.header('Cache-Control', 'no-cache');
+          res.header('Connection', 'keep-alive');
+          res.send(result);
+        } else {
+          res.status(HttpStatus.OK).send(result);
+        }
+        return;
+      }
+
       const result = await this.proxyService.handleChatCompletions(body);
 
       if (body.stream && result instanceof Observable) {