Comparison
21st SDK vs TerminalUse: A Deep Architectural Comparison
21st SDK vs TerminalUse: A Deep Architectural Comparison
Comparison··12 min
Blog
Blog
Guide
How to Build an AI Agent on Top of Claude Code With 21st SDK
Featured
How to Build an AI Agent on Top of Claude Code With 21st SDK
Step-by-step guide to building, deploying, and embedding a production AI agent powered by Claude Code - using 21st SDK for sandboxing, streaming, and React UI.
Guide··7 min
All posts
How do we secure Claude Code in runtime
Guide··6 min
Guide
How to Build an AI Agent on Top of Claude Code With 21st SDK
How to Build an AI Agent on Top of Claude Code With 21st SDK
Guide··7 min
Support Agent: Answer From Docs, Escalate via Email
Guide··4 min
Docs Assistant: Turn Any Documentation Site Into a Conversational AI
Guide··4 min
Lead Research Agent: Auto-Qualify Signups With Claude Code
Guide··4 min
Incident Report
Incident Review: Database Defacement Attack
Incident Review: Database Defacement Attack
Incident Report··5 min