Auto-reply: ignore /models in model directive

src/auto-reply/model.test.ts

@@ -10,11 +10,11 @@ describe("extractModelDirective", () => {
       expect(result.cleaned).toBe("");
     });
 
-    it("extracts /models with argument", () => {
+    it("does not treat /models as a /model directive", () => {
       const result = extractModelDirective("/models gpt-5");
-      expect(result.hasDirective).toBe(true);
-      expect(result.rawModel).toBe("gpt-5");
-      expect(result.cleaned).toBe("");
+      expect(result.hasDirective).toBe(false);
+      expect(result.rawModel).toBeUndefined();
+      expect(result.cleaned).toBe("/models gpt-5");
     });
 
     it("extracts /model with provider/model format", () => {

src/auto-reply/model.ts

@@ -14,7 +14,7 @@ export function extractModelDirective(
   if (!body) return { cleaned: "", hasDirective: false };
 
   const modelMatch = body.match(
-    /(?:^|\s)\/models?(?=$|\s|:)\s*:?\s*([A-Za-z0-9_.:@-]+(?:\/[A-Za-z0-9_.:@-]+)*)?/i,
+    /(?:^|\s)\/model(?=$|\s|:)\s*:?\s*([A-Za-z0-9_.:@-]+(?:\/[A-Za-z0-9_.:@-]+)*)?/i,
   );
 
   const aliases = (options?.aliases ?? []).map((alias) => alias.trim()).filter(Boolean);