Update code.gs

Fixed payloadString bug: Corrected JSON stringification of payload.

code.gs

@@ -1,7 +1,4 @@
-// Default system prompt used if none is provided
 const DEFAULT_SYSTEM_PROMPT = 'You are a helpful and honest assistant. Please, respond concisely and truthfully.';
-
-// Base model for Hugging Face API
 const DEFAULT_MODEL = "mistralai/Mistral-7B-Instruct-v0.3";
 
 /**
@@ -35,7 +32,7 @@ function showApiKeyPrompt() {
  * Sends a request to the Hugging Face API with the specified prompt and model.
  * 
  * @param {string} prompt - The input prompt to be sent to the model.
- * @param {string} [model=DEFAULT_MODEL] - The model ID to query (e.g., 'mistralai/Mistral-7B-Instruct-v0.3').
+ * @param {string} [model] - The model ID to query (e.g., 'mistralai/Mistral-7B-Instruct-v0.3').
  * @param {string} [systemPrompt=DEFAULT_SYSTEM_PROMPT] - The system prompt to customize the assistant's behavior.
  * @returns {object} JSON response from the Hugging Face API.
  * @throws {Error} If the API key is not set or if the API request fails.
@@ -46,23 +43,21 @@ function queryHuggingFace(prompt, model = DEFAULT_MODEL, systemPrompt = DEFAULT_
     throw new Error('Please enter your Hugging Face API key using the menu.');
   }
 
-  const url = `https://api-inference.huggingface.co/models/${model}`;
-  const headers = {
-    "Authorization": `Bearer ${apiKey}`,
-    "Content-Type": "application/json"
-  };
-
-
   const formattedPrompt = `<s> [INST] ${systemPrompt} [/INST] ${prompt} </s>`;
   const payload = {
     "inputs": formattedPrompt
   };
 
+  const payloadString = JSON.stringify(payload);
 
+  const url = `https://api-inference.huggingface.co/models/${model}`;
   const options = {
-    "method": "post",
-    "headers": headers,
-    "payload": JSON.stringify(payload)
+    'method': 'post',
+    'contentType': 'application/json',
+    'headers': {
+      'Authorization': `Bearer ${apiKey}`
+    },
+    'payload': payloadString
   };
 
   try {
@@ -76,11 +71,11 @@ function queryHuggingFace(prompt, model = DEFAULT_MODEL, systemPrompt = DEFAULT_
 
 /**
  * Custom Google Sheets formula to query the Hugging Face API and return the generated text.
- * Function to create the custom formula =HF(prompt; [model]; [systemPrompt])
+ * Function to create the custom formula =HF(prompt, model, [systemPrompt])
  * 
  * @param {string} prompt - The input prompt to be sent to the model.
- * @param {string} [model=DEFAULT_MODEL] - The model ID to query (e.g., 'mistralai/Mistral-7B-Instruct-v0.3').
- * @param {string} [systemPrompt=DEFAULT_SYSTEM_PROMPT] - The system prompt to customize the assistant's behavior. Defaults to DEFAULT_SYSTEM_PROMPT.
+ * @param {string} [model] - The model ID to query (e.g., 'mistralai/Mistral-7B-Instruct-v0.3').
+ * @param {string} [systemPrompt] - The system prompt to customize the assistant's behavior. Defaults to DEFAULT_SYSTEM_PROMPT.
  * @returns {string} The generated output text from the Hugging Face API, or an error message if the request fails.
  */
 function HF(prompt, model = DEFAULT_MODEL, systemPrompt = DEFAULT_SYSTEM_PROMPT) {