Practical AI Notes for Builders

Build Better AI Systems, Faster

I am Ravi, and this is where I publish practical walkthroughs on machine learning, LLM engineering, reinforcement learning, and data systems. Every post is designed to be implementation-ready, not just concept-heavy.1

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LLM Tutorial Series

Learn by building with LangChain, tools, and applied assistant workflows.

Fun with AI: LangChain and GPT-3.5 Turbo Unleashed. Meet Kangala!

Published: March 5, 2025 · Foundations Read article

Leveraging Tools in LangChain: Building a Smart Kangala Care Assistant

Published: March 5, 2025 · Tools and Agents Read article

Reinforcement Learning Series

From tabular control to deep function approximation and policy gradients.

SARSA vs Q-Learning: Understanding On-Policy and Off-Policy RL

Published: March 17, 2026 · Core Concepts Read article

Expected SARSA: Bridging On-Policy and Off-Policy TD Control

Published: March 19, 2026 · Variance-Aware TD Learning Read article

Deep Q-Networks: From Tables to Neural Function Approximators

Published: March 28, 2026 · Deep RL Foundations Read article

REINFORCE: Direct Policy Optimization After Deep Q-Learning

Published: March 30, 2026 · Policy Gradient Methods Read article

Footnotes

  1. The thoughts and opinions shared in this blog are my own. Any product or company names mentioned are trademarks of their respective owners.↩︎