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src/api/routes/modelconversation.js

@@ -1,4 +1,9 @@
 import * as db from '../../db/modelconversation.js';
+import env from '../../config/env.js';
+
+// Model ids that are known to return empty responses from OpenRouter. Requests naming one of
+// these are transparently rerouted to `env.defaultModel` instead of failing at generation time.
+const RETIRED_MODELS = new Set(['stealth/space-bunny-alpha']);
 import { emit } from '../sse.js';
 import { getOrCreateManager, removeManager } from '../../services/conversationManager.js';
 
@@ -145,8 +150,16 @@ export function register(app, basePath = '') {
 
         const { provider, model } = req.body ?? {};
 
+        // Clients may still send the retired `stealth/space-bunny-alpha` id, which now returns
+        // empty responses from the provider. Map it onto the configured default rather than
+        // ignoring the client's choice entirely, so an explicit model selection still works.
+        const requestedModel = typeof model === 'string' ? model.trim() : '';
+        const effectiveModel = RETIRED_MODELS.has(requestedModel) || !requestedModel
+            ? env.defaultModel
+            : requestedModel;
+
         try {
-            const conversation = await db.create(req.user.id, { provider, model });
+            const conversation = await db.create(req.user.id, { provider, model: effectiveModel });
             emit('modelconversation', { companyId: selected.companyId });
             res.status(201).json({ conversation });
         } catch (error) {