Uploaded March 2026 | Updated September 2026, 2 weeks ago
Check out the detailed blog with code: krishcnaik.substack.com/p/guardrails-with-langchain-a-complete?r=6ah1nv&utm_campaign=post&utm_medium=web&triedRedirect=true
In this crash course, we will cover everything you need to know about implementing guardrails in LangChain agents -- from simple keyword filters to production-grade layered middleware stacks. By the end, you will have built a fully guarded healthcare chatbot with PII detection, content filtering, human-in-the-loop approval, and output safety validation.
Here is what we will cover:
What are Guardrails and why do they matter?
Two approaches: Deterministic vs Model-based
Built-in: PII Detection Middleware
Built-in: Human-in-the-Loop Middleware
Custom: Before-Agent Guardrail (input filtering)
Custom: After-Agent Guardrail (output safety)
Layered / Combined Guardrails
Real-World Use Case: Healthcare Chatbot
Visit krishnaik.in for Live courses
Check out the detailed blog with code: krishcnaik.substack.com/p/guardrails-with-langchain-a-complete?r=6ah1nv&utm_campaign=post&utm_medium=web&triedRedirect=true
In this crash course, we will cover everything you need to know about implementing guardrails in LangChain agents -- from simple keyword filters to production-grade layered middleware stacks. By the end, you will have built a fully guarded healthcare chatbot with PII detection, content filtering, human-in-the-loop approval, and output safety validation.
Here is what we will cover:
What are Guardrails and why do they matter?
Two approaches: Deterministic vs Model-based
Built-in: PII Detection Middleware
Built-in: Human-in-the-Loop Middleware
Custom: Before-Agent Guardrail (input filtering)
Custom: After-Agent Guardrail (output safety)
Layered / Combined Guardrails
Real-World Use Case: Healthcare Chatbot
Visit krishnaik.in for Live courses
