langchain-oss-primer

It answers three questions every project must resolve upfront:

1. Which framework? — LangChain, LangGraph, or Deep Agents
2. Which agent archetype? — maps your use case to the right API and patterns
3. What to install and which skills to load next

Load this skill first. Once you've decided on a framework and agent type, follow the "Next Skills" section at the bottom — it tells you exactly which skills to invoke next based on your choices.

Step 1 — Pick Your Framework

The three frameworks are layered, not competing. Each builds on the one below: