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HNSW Explained: How Vector Search Finds a Needle in a Billion-Vector Haystack
Hierarchical Navigable Small World (HNSW) is a state-of-the-art algorithm used for an approximate search of nearest neighbours.

Nagesh Singh Chauhan
10 minutes ago10 min read


AI Agent Evaluation: A Practical Guide
From pass@k to prompt injection: everything you need to evaluate an AI agent before it touches production.

Nagesh Singh Chauhan
3 days ago15 min read


A2A Protocol in Agentic AI: How AI Agents Discover, Delegate, and Collaborate
This article examines A2A from a systems-engineering perspective: its architecture, communication model, protocol objects, task lifecycle, relationship with MCP, practical implementation patterns, limitations, and security requirements.

Nagesh Singh Chauhan
Oct 2315 min read


Introduction to Decision Models in AI
A decision model is a machine learning model designed to select, classify, rank, or score outcomes based on an input state and a defined decision task.

Nagesh Singh Chauhan
Oct 2217 min read


Harness²: How Google Is Rethinking AI Agents to Solve More Complex Problems
Instead of relying exclusively on a more powerful model, can we make the system surrounding a model progressively better at solving different problems?

Nagesh Singh Chauhan
Oct 1918 min read


The State of Simulation for Physical AI
From GPU-powered physics engines to generative world models, simulation is becoming the training ground for the next generation of intelligent robots.

Nagesh Singh Chauhan
Oct 1819 min read


Agentic RAG Explained: How AI Agents Search, Evaluate, and Refine Knowledge
From static retrieval pipelines to intelligent, self-correcting AI systems

Nagesh Singh Chauhan
Oct 1318 min read


Proximal Policy Optimization(PPO)
Proximal Policy Optimization (PPO) was introduced in 2017 for simulated robots and Atari games, it became the optimization engine behind reinforcement learning from human feedback (RLHF) for large language models.

Nagesh Singh Chauhan
Oct 916 min read


Designing Agentic AI Systems: 20 Patterns That Matter
Designing Agentic AI Systems: 20 Patterns That Matter

Nagesh Singh Chauhan
Oct 413 min read


Building the Brain of a Robot: A Deep Dive into Physical AI
Building the Brain of a Robot: A Deep Dive into Physical AI

Nagesh Singh Chauhan
Oct 316 min read


Beyond Embeddings: How VectorLess RAG Finds Its Way Through Long Documents
A practical guide to how hierarchical document trees and LLM-guided navigation find precise evidence in long documents—without relying on chunk embeddings or vector search.

Nagesh Singh Chauhan
Sep 2710 min read


Deep Agents Demystified: The Architecture of Complex AI
A practical deep dive into planning, subagents, context engineering, memory, tools, and autonomous execution.

Nagesh Singh Chauhan
Sep 2617 min read
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