Windsurf IDE Complete Guide 2026: How Cascade Works and Best Practices

Cascade's Core Capabilities

Windsurf, launched by Codeium, differs from Cursor primarily through Cascade—which plans and executes complex tasks like a senior engineer:

Understands the entire codebase: Scans project structure, identifies relevant files

Persistent task memory: Remembers code style preferences, maintains context across sessions

Tool invocation: Reads/writes files, runs terminal commands, searches the codebase

Hands-On: Creating an API Endpoint from Scratch

Prompt: "Add a user management module to a FastAPI project, including registration, login, and JWT authentication." Cascade will: ① Analyze existing structure → ② Create models/user.py → ③ Create routers/auth.py → ④ Update main.py to register routes → ⑤ Generate a Postman test collection. Takes about 2-3 minutes, code is immediately runnable.

Windsurf vs Cursor

FeatureWindsurfCursor

Core Selling PointCascade AgentComposer multi-file editing Code CompletionModerateExcellent (Tab prediction) Project MemoryPersistentSession-level Price$15/month$20/month

For third-party and autonomous agent comparisons, see Cursor vs Copilot vs Windsurf and Windsurf vs Devin vs SWE-agent.

Setting Project Rules

Define team conventions in .windsurf/rules.md, and Cascade will automatically follow them:

Use TypeScript strict mode
All async functions must have error handling
Maintain test coverage above 80%

FAQ

What's the difference between Cascade and regular completion? Cascade plans and executes entire tasks across files, not just completing a single line. Will it remember my style? Yes—persistent memory retains preferences across sessions. How to choose between Windsurf and Cursor? Choose Windsurf if you want "AI to complete entire features"; choose Cursor if you want "suggestions as you type". How to constrain it? Use .windsurf/rules.md to write team conventions.

Summary

Windsurf's core is Cascade—understanding the entire codebase, persistent memory, autonomous cross-file task execution, ideal for "letting AI complete entire features." Use rules.md to enforce style. Those who prefer suggestions while typing will find Cursor more convenient.

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*Updated June 2026. Features and pricing are subject to Windsurf/Codeium official information.*