Ghostwriter AI Intermediate

Ghostwriter is Replit's built-in AI coding assistant. It provides intelligent code completion, generates entire functions from comments, transforms existing code, explains complex logic, and helps debug errors — all directly in the editor.

What is Ghostwriter?

Ghostwriter is an AI pair programmer integrated into the Replit editor. It uses large language models trained on code to understand your intent and generate relevant suggestions. Unlike standalone AI tools, Ghostwriter has full context of your project files and running environment.

Code Completion

Ghostwriter provides real-time code suggestions as you type. It predicts what you are about to write and offers inline completions:

# Type a function signature and Ghostwriter completes the body
def calculate_fibonacci(n):
    # Ghostwriter suggests:
    if n <= 1:
        return n
    return calculate_fibonacci(n - 1) + calculate_fibonacci(n - 2)

To use completions:

• Tab — Accept the current suggestion
• Escape — Dismiss the suggestion
• Alt+] — Cycle through alternative suggestions

Code Generation

Write a comment describing what you want, and Ghostwriter generates the code:

// Create an Express server with a GET /api/users endpoint
// that returns a JSON array of users from a database
const express = require('express');
const app = express();

app.get('/api/users', async (req, res) => {
  try {
    const users = await db.query('SELECT * FROM users');
    res.json(users);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

Ghostwriter Chat

Open the Ghostwriter Chat panel to have a conversation with the AI about your code. It can:

Code Transformation

Select code and use Ghostwriter to transform it. Highlight a block of code, then use the Ghostwriter menu to:

• Explain Code: Get a plain-English explanation of what the selected code does
• Generate Code: Replace the selection with AI-generated code based on a prompt
• Transform Code: Convert code between styles (e.g., class-based to functional)
• Fix Bugs: Let Ghostwriter identify and fix bugs in the selection