fix: strip markdown fences and extract JSON from AI response

src/commands/createTicket.ts

@@ -84,9 +84,23 @@ const generateTicket = async(
     return null;
   }
   try {
+    // Strip markdown code fences the model may wrap the JSON in.
+    const stripped = result.replaceAll(/```(?:json)?\s*/gu, "").trim();
+    // Extract the outermost JSON object in case of surrounding prose.
+    const jsonMatch = /\{[\s\S]*\}/u.exec(stripped);
+    if (jsonMatch === null) {
+      await logger.error(
+        "generateTicket",
+        new Error(`Non-JSON AI response: ${result.slice(0, 200)}`),
+      );
+      return null;
+    }
     // eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Parsing known AI JSON output.
-    return JSON.parse(result) as GeneratedTicket;
-  } catch {
+    return JSON.parse(jsonMatch[0]) as GeneratedTicket;
+  } catch (error) {
+    if (error instanceof Error) {
+      await logger.error("generateTicket", error);
+    }
     return null;
   }
 };