Cursor — Cursor is VSCode rebuilt from the ground up for AI-assisted coding. It's not a plugin - it's a completely reimagined editor where AI is a first-class citizen. The killer features: - Cmd+K to edit code with natural language - Codebase-aware chat that understands your entire project - AI-powered autocomplete that actually gets your style - Tab to accept inline suggestions If you're still using Copilot in regular VSCode, you're missing out. Cursor is what happens when AI isn't bolted on but built in.

LangChain — LangChain is the framework that powers most production LLM apps you've used. It's the plumbing behind the magic. What it provides: - Chains: Connect LLM calls with logic - Agents: LLMs that decide what actions to take - RAG: Retrieval-augmented generation made easy - Memory: Persistent context across conversations If you're building anything serious with LLMs, you'll probably touch LangChain. Python and JS/TS support. Huge ecosystem.