Grant Chat GPT access to secure dynamic code files for assistance in application development (proof of concept code included)

Desired Behaviour:

Currently there is no way to grant Chat GPT access to secure, dynamic (as opposed to static) files that could be used as a dynamic reference during chat sessions (for example, files in a private GitHub repo, or some other secure file store).

The reason I am seeking this functionality is because the following would be helpful:

  • When doing an application refactor, or building a new app, Chat GPT has access to the latest, dynamic, version of all application files
  • Chat GPT is able to analyse each file on its implementation of best practices, security and design patterns
  • Chat GPT is able to analyse the integrity of the overall application, its structure, and whether the individual files are following consistent patterns and best practices

Current Behavior:

The current, related, functionality has these drawbacks:

  • Uploading files as attachments to chat prompts produces inconsistent outcomes, and the chat instance gets confused about what version is the latest.

  • The same is true for code snippets pasted directly in chats, encapsulated in triple backticks.

  • Custom GPT configuration ‘file stores’ are only helpful as static resources (even when using in combination with the ‘GPT mentions’ feature).

Proof Of Concept:

I decided to ask Chat GPT how easy it would be to utilise the OpenAI API to run such an analysis on local files and to generate some sample code to achieve this functionality.

After a few back and forths with Chat GPT, and a few manual modifications to the code, below is the code for a proof of concept Node application that achieves the desired outcome, albeit imperfectly.


  • Chat GPT only seemed to have knowledge of using the old /v1/completions API endpoint (including which model to choose, and its request and response formats), and required me to figure out how to use the new endpoint, model and request/response formats documented here:

  • I have not used the API previously, so it is likely I have not used it well

  • Because the response from the API was quite large, after running node index.js from the terminal, the cursor just moved to the next line and blinked for a while before eventually returning a response

  • This working code is a proof of concept and could definitely be improved by someone who had the time and interest to do so

  • I take no responsibility for any errors or undesired behaviour in the code - for example, Chat GPT introduced some recursion in order to be able to analyse a nested folder structure, and it seems to be OK, but I haven’t fully vetted it - use your own discretion before running the code

Steps To Create and Run Proof of Concept App:

  1. Ensure you have an OpenAI developer account and associated API key
  2. Create a folder from your terminal, eg: mkdir openai-code-wizard
  3. Navigate into the folder with cd openai-code-wizard/
  4. Initialise a Node project with npm init -y
  5. Install Axios (to make the request to the OpenAI API) with npm install axios
  6. Create a file named index.js and paste in the code provided below (replace the API key with your own)
  7. Add a folder named sample_node_app which contains the files and content listed below
  8. Run the application with node index.js
  9. Wait until a response is returned

Proof of Concept App - Structure:

 - node_modules/
 - sample_node_app/
 -- middleware
 --- middleware.js  
 -- routes/
 --- other_route.js
 --- route_index.js  
 -- app.js  
 - index.js
 - package.json
 - package-lock.json  

Proof of Concept App - File Contents:


const sampleMiddleware = (req, res, next) => {
    console.log('Sample Middleware Called');

module.exports = { sampleMiddleware };


const express = require('express');
const router = express.Router();
const { sampleMiddleware } = require('../middleware/middleware');

router.get('/', sampleMiddleware, (req, res) => {
    res.send('Response from other route');

module.exports = router;


const express = require('express');
const router = express.Router();
const otherRoute = require('./other_route');

router.use('/other', otherRoute);

module.exports = router;


const express = require('express');
const app = express();
const routeIndex = require('./routes/route_index');

app.use('/', routeIndex);

app.listen(3000, () => {
    console.log('Server is running on http://localhost:3000');


const fs = require('fs').promises;
const path = require('path');
const axios = require('axios');

const directoryPath = path.join(__dirname, 'sample_node_app'); // Adjust the directory path eg 'sample_node_path' is a folder within your calling app
const openAIKey = '***'; // Use your OpenAI API key

// Function to generate a summary of the directory 
async function generateDirectorySummary(directory, prefix = '') {
    let summary = '';
    const entries = await fs.readdir(directory, { withFileTypes: true });

    for (const entry of entries) {
        if (entry.isDirectory()) {
            // If the entry is a directory, recursively call this function (this handles nested folders within the directory)  
            summary += `${prefix}- ${}/\n`;
            summary += await generateDirectorySummary(path.join(directory,, `${prefix}  `);
        } else {
            // If the entry is a file, just add it to the summary
            summary += `${prefix}- ${}\n`;

    return summary;

// Function to analyze a single file
async function analyzeFile(filePath) {

  const fileName = path.basename(filePath); // This gets the file's name with extension

  try {
    const content = await fs.readFile(filePath, 'utf8');
    const prompt = `Please provide a concise report on the code in this Node.js application file (${fileName}), focusing on its implementation of best practices, design patterns and security:\n\nCode:\n${content}`; 
    const response = await'', {
      model: 'gpt-4-0125-preview', // Check for the latest model version
      messages: [
          "role": "system",
          "content": "You are a helpful assistant."
          "role": "user",
          "content": prompt
    }, {
      headers: {
        'Authorization': `Bearer ${openAIKey}`,
        'Content-Type': 'application/json'
    return `\n\nAnalysis for "${fileName}":\n\n${[0].message.content}\n\n\n======================`;
  } catch (error) {
    console.error('An error occurred:',;
    return `Failed to analyze ${fileName} due to an error.\n`;

// Function to analyze the overall architecture after individual file analyses
async function analyzeOverallArchitecture(fileAnalyses, directorySummary) {
  try {
    const prompt = `Below is a list of AI generated reports of individual files within a Node.js application which has this structure:\n\n${directorySummary}\n\nThe reports focus on each files implementation of best practices, design patterns and security. Based on these reports, please provide your thoughts on the integrity of the overall application, its structure, and whether the individual files are following consistent patterns and best practices.`;
    const response = await'', {
      model: 'gpt-4-0125-preview',
      messages: [
          "role": "system",
          "content": "You are a helpful assistant."
          "role": "user",
          "content": prompt
    }, {
      headers: {
        'Authorization': `Bearer ${openAIKey}`,
        'Content-Type': 'application/json'

    return `\n\nOverall application analysis:\n\n${[0].message.content}\n\n\n======================`;
  } catch (error) {
    console.error('An error occurred in analyzing the overall architecture:',;
    return "Failed to analyze the overall architecture due to an error.\n";

// Main function to analyze directory and accumulate insights
async function analyzeDirectory(directory) {
  let fileAnalyses = "";
  const directorySummary = await generateDirectorySummary(directory);

  // Log the directory contents as a sanity check   
  console.log(`This is the contents of the directory:\n\n${directorySummary}\n\n======================`); 

  // Function to recursively analyze files in directory and subdirectories
  async function analyzeFilesRecursively(currentDirectory) {
    const entries = await fs.readdir(currentDirectory, { withFileTypes: true });
    for (const entry of entries) {
      const entryPath = path.join(currentDirectory,;
      if (entry.isDirectory()) {
        await analyzeFilesRecursively(entryPath); // Recurse into subdirectory
      } else {
        const analysis = await analyzeFile(entryPath); // Analyze file
        fileAnalyses += analysis;

  try {
    await analyzeFilesRecursively(directory); // Start the recursive file analysis
    console.log(fileAnalyses); // Print individual file analyses

    const overallAnalysis = await analyzeOverallArchitecture(fileAnalyses, directorySummary);
    console.log(overallAnalysis); // Print overall application analysis
  } catch (error) {
    console.error('Failed to read directory or analyze files:',;


Proof of Concept App - Example Response from the OpenAI API:

This is the contents of the directory:

- app.js
- middleware/
  - middleware.js
- routes/
  - other_route.js
  - route_index.js


Analysis for "app.js":

This Node.js application uses Express.js, a popular framework for building web applications in Node.js. The provided code snippet demonstrates a simple Express app with a focus on routing and basic setup. Below is an evaluation based on best practices, design patterns, and security considerations:

### Best Practices

1. **Modularization**: The app adheres to a modular structure by separating the route definitions into a different file (`route_index`). This improves code organization and maintainability.
2. **Use of Callbacks**: The app uses a callback function to notify when the server is running. This is a common pattern in Node.js for handling asynchronous operations.
3. **Environment-agnostic Port Configuration**: While the code directly uses port `3000`, it's better to allow port configuration to be environment-agnostic, e.g., `const port = process.env.PORT || 3000;`. This facilitates deployment across different environments.

### Design Patterns

1. **Middleware Pattern**: Express.js is built around the middleware pattern, where `app.use()` is used to add middleware functions to the application's request handling pipeline. This pattern is exemplified by the use of the route handler (`routeIndex`) as middleware.
2. **Callback Pattern**: The listening function employs the callback pattern, a fundamental asynchronous pattern in Node.js, evident in the `app.listen()` method.

### Security Considerations

While the provided snippet is quite basic and does not delve deeply into areas where security concerns are most prevalent, there are still several general security practices to consider in the context of Express.js applications:

1. **Input Validation**: Always validate and sanitize input to protect against injections and other input-based attacks. This snippet does not directly deal with input, but when expanding, proper input handling should be a priority.
2. **HTTPS**: Serving the app over HTTPS instead of HTTP to ensure encrypted communication. This example doesn't specify using HTTPS, which is essential for protecting data in transit.
3. **Helmet**: Consider using Helmet, a middleware for Express applications that helps secure your app by setting various HTTP headers. Not present in the snippet but recommended for Express apps.
4. **Rate Limiting**: Implement rate limiting to prevent denial-of-service attacks. This can be achieved with middlewares like `express-rate-limit`.
5. **Dependency Management**: Regularly update dependencies to mitigate vulnerabilities in third-party packages. Although not directly visible from this code, it’s an essential practice.

### Conclusion

The provided Node.js application snippet demonstrates basic setup and modular routing structure in Express.js, adhering to some fundamental best practices and design patterns. However, for a production-level application, it's vital to also focus on security aspects, including but not limited to, HTTPS implementation, input validation, and regular dependency updates. Adopting environment variables for configuration can further improve the application's flexibility across different deployment environments.


Analysis for "middleware.js":

The provided snippet shows a simple Node.js middleware function named `sampleMiddleware`. In the context of Express.js or similar frameworks, middleware functions are used to process requests, responses, or to modify the request/response objects between the time a server receives a request and the time it sends a response. Here's an analysis based on best practices, design patterns, and security concerns:

### Best Practices

- **Clarity and Simplicity:** The middleware is straightforward and clearly named, indicating it's a sample or template piece of middleware. This is good for maintain ability and readability.
- **Modularity:** By defining the middleware in its module and exporting it, the code follows a modular design pattern. This facilitates reuse across different parts of the application, adheres to the Single Responsibility Principle, and makes the middleware easy to test in isolation.
- **Next Function Call:** The middleware correctly calls `next()` to pass control to the next middleware function in the stack. This is a crucial aspect of middleware construction in Express.js, ensuring that the request/response cycle can continue.

### Design Patterns

- **Middleware Pattern:** This code snippet is an implementation of the Middleware pattern, where middleware functions are used to process requests in a decoupled manner. This design pattern is extensively used in web servers and applications for tasks like logging, parsing, authentication, and more.
- **Chain of Responsibility:** The middleware pattern in Express.js can be seen as an instance of the Chain of Responsibility pattern. Each middleware has the chance to process the request and decide whether to pass control to the next handler in the chain. This specific middleware does not make any decision based on the request or response objects but demonstrates where such logic can be inserted.

### Security Concerns

- **Minimal Risk in Provided Code:** The provided middleware does nothing beyond logging and passing control to the next middleware, posing minimal direct security risks. However, the use of `console.log` in production environments should be carefully considered.
- **Logging Sensitive Information:** While not present in the snippet, a common pitfall is to log sensitive information. Be cautious not to log any personal, sensitive, or identifiable information about users without proper handling, such as masking.
- **Use in Production:** For a production environment, replace generic console logging with a more robust logging framework that can handle different levels of logging (info, error, warning) and direct logs to appropriate destinations (files, log management systems) securely.

### Additional Recommendations

- **Conditional Logging:** For more significant applications, you might want to conditionally enable logging based on the environment (development, staging, production) or based on log levels.
- **Error Handling:** Consider expanding middleware capabilities to handle errors more gracefully. Express.js supports error-handling middleware that requires four arguments instead of three (`err, req, res, next`). This can be particularly useful for catching and responding to any errors that may occur during the request-handling cycle.

In summary, the provided code is a simple, well-structured example of an Express.js middleware function that adheres to best practices in its current form. It offers a good starting point for further development, with considerations for security and extensibility nicely outlined above.


Analysis for "other_route.js":

The provided Node.js application file (other_route.js) uses `Express.js` to define a route and demonstrates several good practices alongside areas of potential improvement concerning design patterns, best practices, and security considerations. Here’s an analysis based on those criteria:

### 1. Modular Route Handling:
- **Best Practice**: The use of `express.Router()` to create modular, mountable route handlers is a good practice. It helps keep the application's routing structure organized.
- **Design Pattern**: This leverages the **Module** design pattern, promoting the separation of concerns and making the codebase more maintainable.

### 2. Middleware Integration:
- **Best Practice**: Implementing middleware (`sampleMiddleware`) for route-specific functionality or validation is an excellent practice. It allows for code reuse and cleaner code structure.
- **Security Consideration**: Depending upon the implementation of `sampleMiddleware`, it could serve critical purposes such as authentication, logging, or input validation, which are essential for securing the application against various attacks (e.g., unauthorized access, injection attacks).

### 3. Response Handling:
- **Best Practice**: The route handler sends a simple text response to the client, which is straightforward for this example. However, for a real application, ensuring that the response type (e.g., JSON) and content are appropriate for the client's needs is essential.
- **Security Consideration**: The sample does not expose sensitive information in the response, which is good. However, in broader applications, it's vital to ensure responses do not leak sensitive data.

### Potential Areas for Improvement:

1. **Error Handling**: The code does not demonstrate explicit error handling. It's beneficial to use middleware for error handling in Express applications to catch and respond to errors consistently.

2. **HTTP Headers Security**: Consider using security-related headers to protect the app from certain classes of web vulnerabilities. Libraries like `helmet` can automatically add recommended HTTP headers to help secure the app.

3. **Logging and Monitoring**: While not shown, implementing logging (for tracking access and errors) and monitoring can be crucial for maintaining the health and security of a web application. It's good practice to log accesses and exceptions, carefully avoiding sensitive data.

4. **Rate Limiting**: To protect against brute-force attacks, adding rate limiting on routes can be prudent. This ensures that a client cannot make too many requests in a short period. Middleware like `express-rate-limit` can be used for this purpose.

5. **Validation and Sanitization**: While not directly visible in the provided code, ensuring that any input coming from the client (e.g., in query parameters, body) is properly validated and sanitized is critical for security, protecting against injection attacks and other input-based vulnerabilities.

In conclusion, the provided code snippet employs several good practices in terms of modularization and middleware usage within a Node.js/Express application. However, to fully adhere to best practices and security principles, considerations around error handling, secure headers, logging, rate limiting, and user input validation should be incorporated into the broader application context.


Analysis for "route_index.js":

Based on the provided Node.js application file (`route_index.js`), which is intended to use Express.js for routing, here is a concise report evaluating its implementation in terms of best practices, design patterns, and security:

### Best Practices

1. **Modularity**: The code demonstrates good use of modularity by separating the route handling logic for "/other" into a different file (`other_route`). This keepsthe routing structure organized and scalable.

2. **Clarity and Simplicity**: The implementation is straightforward and easy to understand. It sticks to the principle of doing one thing and doing it well, focusing solely on routing.

### Design Patterns

1. **Decorator Pattern**: In a broader sense, the use of `router.use()` can be seen as an instance of the Decorator pattern, where additional functionality (middleware) can be attached to an object (`router`) dynamically. However, in this specific case, it's used for route mounting rather than adding middleware, so this point is more about the potential use of patterns rather than an actual implementation.

2. **Module Pattern**: The use of `require` and `module.exports` adheres to the Module pattern, promoting encapsulation and reusability. By exporting the router object, it allows for a neat separation of concerns where each route file manages its own endpoints.

### Security

1. **Dependency Security**: The code itself does not directly reveal how dependencies are managed, but using popular, well-maintained libraries like Express is generally a positive indicator. Ensuring that `express` and any middleware are kept up-to-date is critical for security.

2. **Input Validation/Sanitization**: The provided code snippet does not include details on handling user input, which is a critical aspect of web application security. It is essential to validate and sanitize user input in `otherRoute` or any middleware used to avoid common web vulnerabilities, such as SQL injection, XSS, etc. This aspect cannot be evaluated from the given snippet.

3. **Use of HTTPS**: The code snippet does not indicate whether HTTPS is enforced for connections, which is crucial for protecting data in transit. It's advisable to ensure Express applications are served over HTTPS, potentially using middleware to enforce it.

### Recommendations for Improvement

1. **Security Middlewares**: Consider using security-related middlewares like `helmet` to set various HTTP headers for app security.

2. **Validation and Error Handling**: Ensure there is comprehensive request validation and error handling in place, potentially using packages like `express-validator` and middleware for catching and responding to errors gracefully.

3. **Logging and Monitoring**: Integrate logging and monitoring utilities to keep track of application health and potential security incidents or operational issues.

4. **Configurable Routes**: For scalability, consider making routes configurable through environment variables or a configuration file, especially as the application grows.

Overall, the `route_index.js` file follows good practices concerning modularity and structure. However, due to the limited scope of the provided code, several aspects regarding design patterns beyond basic modularity and crucial security considerations cannot be thoroughly evaluated. Continuous attention to updating dependencies, securing user input, and enforcing secure connections is recommended for maintaining a secure and well-architected application.


Overall application analysis:

Sure, while I can't view the actual AI-generated reports you're referring to, I'll lay out a framework based on common conventions, best practices, and security considerations within a Node.js application structure like the one you've described. This should help you evaluate the integrity of your app and its compliance with standard practices.

### App Structure:

1. **app.js**: This is typically the entry point of the application where you set up your server, connect to databases, and import necessary middleware.

    - Best Practices:
        - Ensure it's clean and only includes what's necessary for starting up the application.
        - Database connections should be handled carefully to avoid exposing sensitive credentials.
        - Security measures like CORS, helmet, and rate limiting should be configured here.

2. **middleware/**

    - **middleware.js**: Middleware are functions that have access to the request object (req), the response object (res), and the next middleware function in the application’s request-response cycle. Middleware functions can execute code, make changes to the request and the response objects, end the request-response cycle, and call the next middleware function.

        - Best Practices:
            - Should be reusable and focused on a single task.
            - Logging, error handling, and session management are common middleware.
            - Security-related middleware (e.g., for authentication and authorization) should follow secure coding principles to avoid vulnerabilities like injection attacks or privilege escalation.

3. **routes/**

    - **other_route.js & route_index.js**: These files should manage the routing of your application, defining URLs (endpoints) and HTTP methods (GET, POST, etc.).

        - Best Practices:
            - Keep route handlers concise and focused on a single functionality.
            - Validate input data rigorously to prevent common web vulnerabilities (e.g., SQL Injection, XSS).
            - Authentication and authorization checks should be performed consistently.
            - Response data should be sanitized where necessary.
            - Proper status codes and error messages should be used.

### Overall Application Integrity and Consistency:

- **Consistency**: Check if naming conventions (e.g., for files, routes, functions) and code style are consistent across the application. This includes the consistent use of callbacks, promises, or async/await for asynchronous operations.

- **Structure & Modularity**: The separation between the `middleware`, `routes`, and other components suggests an attempt at a modular design, which is good. Ensure that functionality is logically separated, and there's no tight coupling between components.

- **Security**:
    - Make sure all security practices are uniformly applied, such as validating and sanitizing input across all routes to prevent injection attacks.
    - Use HTTPS, implement proper authentication (JWT tokens are commonly used), and ensure sensitive data is encrypted both at rest and in transit.
    - Regularly update dependencies to mitigate vulnerabilities from third-party packages.

- **Design Patterns**: Implementing design patterns (e.g., MVC, Factory, Singleton) can improve the maintainability and scalability of the application. Check if the application's design follows any patterns consistently and appropriately.

- **Testing**: Lastly, although not specified in your structure, ensure there's a mechanism for testing (unit tests, integration tests) to continuously check the integrity and security of your application.

Reviewing these areas and ensuring adherence to the outlined best practices will significantly contribute to the application's overall integrity, security, and maintainability.