Field Notes

Insights from the Consultancy

Lessons from real client engagements — applied AI, multimodal RAG, intelligent automation, smart contracts on Ethereum and Solana, and the engineering discipline that takes systems from prototype to production.

Khrystynych Innovations Inc is an AI and Web3 consultancy specializing in multimodal RAG, AI automation, AI training, and smart contract engineering on Ethereum and Solana.

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Article

Field Notes: Knowledge Graphs and AI Agents

By Volodymyr Khrystynych

Notes from the Global Azure Bootcamp — API governance for AI workloads, the new shape of phishing, knowledge graphs as a context layer for LLMs, and why governance keeps showing up in every talk.

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Article

Field Notes: OWASP API Security Patterns

By Volodymyr Khrystynych

Notes from a meetup talk on real-world API breaches — the patterns that keep producing them, and the small, boring controls that prevent most of the damage.

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Article

Field Notes: Building a Web3 Marketplace

By Volodymyr Khrystynych

Notes from building CryptoRabbit.net — a digital asset marketplace with React Native, Next.js, and AWS Lambda, plus AI-powered listing checks that quietly do most of the moderation work.

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Article

Smart Contracts vs. the Double-Entry Ledger

By Roman Khrystynych

A comparison of two systems for keeping financial truth — the 700-year-old double-entry ledger and the modern smart contract. Different trust models, different failure modes, different reasons to exist. Why most real systems end up using both, and how to decide which responsibilities belong on which side.

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Article

Designing an Escrow Contract for a Crypto Marketplace

By Roman Khrystynych

A design retrospective on the smart-contract escrow that underpins CryptoRabbit — why a non-custodial escrow beat a platform wallet, how the state machine and timeouts are shaped, and the chain trade-offs between Ethereum (EVM) and Solana.

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Article

Field Notes: An AI Pet Health Platform

By Volodymyr Khrystynych

Notes from building PetPortal.ai — an AI advisor that promises pet-health answers in 60 seconds. Lessons on shipping applied AI alongside subscriptions, a community feed, and a workflow-automation backbone.

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Article

Four Useful Ways to Incorporate AI Into Your Business

By Roman Khrystynych

Most teams reach for "an AI" without picking which kind. There are really four useful patterns — vector search, retrieval-augmented generation, multi-agent systems, and training your own model — each with very different cost, complexity, and payoff. This article walks through when each one is the right tool, with examples from real systems including the pet portal product search.

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Article

What I Learned Building Agents for Multi-Agent Systems

By Roman Khrystynych

Building multi-agent systems teaches the value of balancing complexity with efficiency. Simplicity, effective use of natural language, and clear examples are key to unlocking their full potential. This article shares practical lessons and highlights the role of natural language and examples in guiding agents effectively.

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Article

How to Think About Agents

By Roman Khrystynych

A practical mental model for building tools and applications with LLMs. Treat agents less like APIs and more like motivated junior collaborators — give them context, constrain the problem, and design tight feedback loops. Lessons from working alongside an AI-native startup founder on real products.

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Article

AI + AWS CDK: Simplifying Infrastructure Management

By Roman Khrystynych

Infrastructure management used to be complex and time-consuming, often requiring deep technical knowledge and hours of troubleshooting. With AI, it’s now much easier and faster. This article outlines a three-step process for leveraging AI in infrastructure: setting up resources, debugging with AI digests, and iterating for optimization. This approach has made managing infrastructure more accessible, empowering more people to build efficiently and focus on strategic goals.

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Article

NgRx: Handling API State

By Roman Khrystynych

Managing asynchronous API states like `isBusy`, `isDone`, or `isError` can be challenging. Here’s a structured approach using NgRx to make it easier.

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Article

Auto Save Architecture

By Roman Khrystynych

A technical breakdown of implementing auto-save capabilities similar to Google Sheets, focusing on data synchronization and efficient real-time data handling in a front-end application.

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Article

Ever wanted to use git without the command line?

By Roman Khrystynych

This article focuses on WebStorm which is an IDE created by the wonderful folks at JetBrains. The IDE provides great functional tools for web development such as git integration which will be discussed in this article. This article assumes the reader is familiar with git concepts including forking and rebasing.

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