Clarify model names in selector

packages/server/src/server/agent/providers/pi/agent.test.ts

@@ -1158,6 +1158,11 @@ describe("transformPiModels", () => {
           id: "openrouter/google/gemini-2.5-flash-lite",
           label: "openrouter/google/gemini_2.5 flash lite",
         },
+        {
+          provider: "pi",
+          id: "openrouter/openai/gpt-5.5",
+          label: "openrouter/OpenAI: GPT-5.5",
+        },
       ]),
     ).toEqual([
       {
@@ -1166,6 +1171,12 @@ describe("transformPiModels", () => {
         label: "gemini 2.5 flash lite",
         description: "openrouter/google/gemini_2.5 flash lite",
       },
+      {
+        provider: "pi",
+        id: "openrouter/openai/gpt-5.5",
+        label: "GPT-5.5",
+        description: "openrouter/OpenAI: GPT-5.5",
+      },
     ]);
   });
 });

packages/server/src/server/agent/providers/pi/agent.ts

@@ -237,7 +237,13 @@ interface PiSlashCommandInvocation {
 type AutoCompactMode = boolean | "toggle" | "unknown";
 
 function normalizePiModelLabel(label: string): string {
-  return label.trim().replace(/[_\s]+/g, " ");
+  const normalizedLabel = label.trim().replace(/[_\s]+/g, " ");
+  const vendorSeparatorIndex = normalizedLabel.indexOf(": ");
+  if (vendorSeparatorIndex === -1) {
+    return normalizedLabel;
+  }
+
+  return normalizedLabel.slice(vendorSeparatorIndex + 2).trim();
 }
 
 export function transformPiModels(models: AgentModelDefinition[]): AgentModelDefinition[] {