AI IDE
An AI IDE is a development environment in which an AI agent is the primary or co-equal interface for writing and editing code, rather than an autocomplete sidecar layered on top of a traditional editor. Cursor and Windsurf are AI IDEs in the strict sense — forked editors with the agent built into the core experience. Cline, GitHub Copilot Workspace, and similar tools are AI-IDE-class extensions that bring comparable agent capability into VS Code or JetBrains. AI IDEs are distinguished from "IDEs with AI features" — VS Code with Copilot completion, JetBrains with AI Assistant — by where the agent sits in the workflow: at the center of the loop rather than at its edges.
Example
In an AI IDE, a developer's primary action is to describe a change in natural language — "extract this validation logic into a shared module and update all call sites." The editor proposes a multi-file diff, highlights the affected files, and waits for approval. The developer reviews the diff, accepts or edits, and the changes land. Typing each individual edit becomes the exception rather than the rule.
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