Windsurf's technical approach centers on "Cascade" — a feature that maintains context across multiple editing steps, understanding not just the current file but the sequence of changes the developer is making. This enables multi-step refactoring where the AI understands the overall goal (e.g., "migrate from REST to GraphQL") and applies consistent changes across files without losing track of the big picture.
The competition: Cursor (VS Code fork, first mover, largest user base), Windsurf (VS Code fork, strong free tier, Cascade), GitHub Copilot (VS Code extension, massive distribution via GitHub), and Claude Code (terminal-based, full autonomy). Each takes a different approach to the same problem: how should developers interact with AI? The market is large enough for multiple winners because developer preferences vary — some prefer inline suggestions, others prefer chat, others prefer autonomous agents.