feat(proxy): add model name prefix stripping option (#568)

Add stripModelPrefix boolean setting that, when enabled, strips
provider prefixes (e.g. openai/, anthropic/) from incoming model
names and re-resolves the bare model name using existing heuristics.

This allows tools to send prefixed model names while OmniRoute
handles provider routing at the proxy layer.

- Add stripModelPrefix to settings validation schema (Zod)
- Check setting in getModelInfo() after custom node matching fails
- Falls through to normal resolution on error or when disabled
- Backward compatible: opt-in, default behavior unchanged

src/shared/validation/settingsSchemas.ts

@@ -42,6 +42,8 @@ export const updateSettingsSchema = z.object({
   a2aEnabled: z.boolean().optional(),
   // CLI Fingerprint compatibility (per-provider)
   cliCompatProviders: z.array(z.string().max(100)).optional(),
+  // Strip provider/model prefix at proxy layer (e.g. "openai/gpt-4" → "gpt-4")
+  stripModelPrefix: z.boolean().optional(),
   // Custom CLI agent definitions for ACP
   customAgents: z
     .array(

src/sse/services/model.ts

@@ -1,5 +1,6 @@
 // Re-export from open-sse with localDb integration
 import { getModelAliases, getComboByName, getProviderNodes, getCustomModels } from "@/lib/localDb";
+import { getSettings } from "@/lib/localDb";
 import {
   parseModel,
   resolveModelAliasFromMap,
@@ -77,6 +78,18 @@ export async function getModelInfo(modelStr) {
         ...(apiFormat && { apiFormat }),
       };
     }
+
+    // stripModelPrefix: if enabled, strip provider prefix and re-resolve
+    // the bare model name using existing heuristics (claude-* → anthropic, etc.)
+    try {
+      const settings = await getSettings();
+      if (settings.stripModelPrefix === true) {
+        const strippedResult = await getModelInfoCore(parsed.model, getModelAliases);
+        return { ...strippedResult, extendedContext };
+      }
+    } catch {
+      // If settings read fails, fall through to normal resolution
+    }
   }
 
   if (!parsed.isAlias) {