fix JSON array/object parser regression in JParser::parse_value

bantam.hpp

@@ -225,7 +225,7 @@ bool parse_nonstream_response(std::string_view body, Message &out, Usage &usage)
 
 /* ------------------------------------------------------------------ */
 /* llm.cpp — HTTP client (libcurl), headers, backoff, dispatch.        */
-/* -------------------------------------------------------------- */
+/* ------------------------------------------------------------------ */
 int http_get(Cfg &cfg, std::string_view url, std::string &body, long &code,
              std::string &errmsg);
 int llm(Cfg &cfg, Messages &msgs, bool use_tools, Message &out, Usage &usage,

json.cpp

@@ -401,6 +401,30 @@ struct JParser {
       return true;
     }
     if (c == '[') {
+      pos++;
+      skip_ws();
+      out = Json::array();
+      if (pos < src.size() && src[pos] == ']') {
+        pos++;
+        return true;
+      }
+      while (true) {
+        Json elem;
+        if (!parse_value(elem, depth + 1)) return false;
+        out.aval.push_back(std::move(elem));
+        skip_ws();
+        if (pos < src.size() && src[pos] == ',') {
+          pos++;
+          continue;
+        }
+        if (pos < src.size() && src[pos] == ']') {
+          pos++;
+          return true;
+        }
+        return false;
+      }
+    }
+    if (c == '{') {
       pos++;
       skip_ws();
       out = Json::object();