Replit Ghostwriter is the AI layer built into Replit's browser-based IDE, rather than a separate product developers install. It offers inline code completion, code explanation for understanding unfamiliar logic, natural-language-driven refactoring, and full code generation from a plain-language prompt, functioning as an always-available pair programmer for whatever's open in the Replit workspace.
Because it lives inside Replit, it's tuned for the kind of quick, browser-based coding Replit is built around: students learning to code, hobbyists prototyping an idea, and developers who want to go from an empty workspace to running code without setting up a local environment first. Support spans more than 50 programming languages, reflecting Replit's broad base of users rather than a narrow focus on one ecosystem.
Ghostwriter predates a lot of the current wave of standalone AI coding agents and has stayed positioned as a companion feature of the Replit IDE rather than trying to compete directly with dedicated tools like Cursor or Copilot on raw capability.