• - Model I/O: Learn how to connect with language models.
• - Chains: Find out how to make series of calls.
• - Callbacks: Understand how LangChain responds to events.
• - Retrieval: Understand how to get specific data for your app.
• - Memory: Learn how to save data between chain uses.
• - Agents: See how chains pick the right tools for the job.

• 1. Structured Output (Zod/JSON Schema): Ensure your agent returns valid Ruby code or JSON that your Rails controllers can actually parse.
• 2. Human-in-the-Loop Checkpoints: How can your Rails app "pause" an agent's execution to ask the user, "I'm about to drop a column in the database, proceed?"
• 3. Context Pruning: Rails apps can get big. Use LangChain's new summarization middleware to keep the agent's context window focused on the specific controller or model being edited.