(defun execute-gemini-request (prompt system-prompt)
  (let* ((auth (org-agent:get-provider-auth :gemini))
         (api-key (getf auth :api-key))
         (bearer-token (getf auth :bearer-token))
         (endpoint (or (getf auth :endpoint) 
                       "https://generativelanguage.googleapis.com/v1beta/models/gemini-pro:generateContent")))
    
    (unless (or api-key bearer-token)
      (return-from execute-gemini-request "(:type :LOG :payload (:text \"Authentication missing for Gemini\"))"))
    
    (let* ((url (if api-key (format nil "~a?key=~a" endpoint api-key) endpoint))
           (headers `(("Content-Type" . "application/json")
                      ,@(when bearer-token `(("Authorization" . ,(format nil "Bearer ~a" bearer-token))))))
           (body (cl-json:encode-json-to-string
                  `((contents . ((parts . ((text . ,(format nil "~a~%~%Prompt: ~a" system-prompt prompt))))))))))
      (handler-case
          (let* ((response (dex:post url :headers headers :content body :connect-timeout 10 :read-timeout 30))
                 (json (cl-json:decode-json-from-string response)))
            (cdr (assoc :text (cdr (assoc :parts (car (cdr (assoc :parts (car (cdr (assoc :candidates json)))))))))))
        (error (c)
          (format nil "(:type :LOG :payload (:text \"Neural Engine Failure: ~a\"))" c))))))