Tokens, Models and Prices: What an LLM Call Actually Costs
Tokens are the unit you are billed in, and they are not words. This post covers tokenization, counting before you send, model tiers, and how the costs really add up.
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View allLangChain v1: What Changed, What Moved, and Why Old Tutorials Break
Most LangChain tutorials online were written before v1 and no longer run. Here is what moved, what landed in langchain-classic, and how to read old code safely.
LangChain Explained: What It Solves, Where It Helps, and What This Series Covers
LangChain is widely used and widely misunderstood. This post explains the problems it actually solves, where it earns its complexity, and what this series will build.
SV5UI: A Component Library for Svelte 5 That Carries You Past the Easy Part
A Svelte 5 component library built for the month your application stops being simple: seventy-plus components, theming you control, and a data grid and scheduler to match.
Query Optimization: How to Read EXPLAIN Plans and Fix Slow Queries
A slow query in production is a fire. EXPLAIN plans show exactly where the database wastes time — if you know how to read them. This post teaches you how, with real examples.
Relational Model & Normalization: How to Design Tables That Last
Bad schema design creates bugs invisible until production. Learn the relational model from first principles, then normalize to 3NF/BCNF with real examples and trade-offs.
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AI & Tools
8 min read
Tokens, Models and Prices: What an LLM Call Actually Costs
Tokens are the unit you are billed in, and they are not words. This post covers tokenization, counting before you send, model tiers, and how the costs really add up.
AI & Tools
7 min read
LangChain v1: What Changed, What Moved, and Why Old Tutorials Break
Most LangChain tutorials online were written before v1 and no longer run. Here is what moved, what landed in langchain-classic, and how to read old code safely.
AI & Tools
6 min read
LangChain Explained: What It Solves, Where It Helps, and What This Series Covers
LangChain is widely used and widely misunderstood. This post explains the problems it actually solves, where it earns its complexity, and what this series will build.
Open Source
7 min read
SV5UI: A Component Library for Svelte 5 That Carries You Past the Easy Part
A Svelte 5 component library built for the month your application stops being simple: seventy-plus components, theming you control, and a data grid and scheduler to match.
Databases
9 min read
Cassandra Deep Dive: Wide-Column Model, Tunable Consistency and the Write Path
Cassandra is built for write-heavy workloads at massive scale — but only if you model data for your queries, not your intuition. This post explains the model and the write path.
Databases
11 min read
Redis Deep Dive: Data Structures, Persistence, Pub/Sub and Production Patterns
Redis is not just a cache. Its five core data structures solve problems that would require complex code otherwise. This post covers all of them plus persistence and Pub/Sub.
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Completed
3 posts
LangChain Fundamentals: From the OpenAI API to Your First RAG App
Eight posts taking LangChain from first principles to a working RAG pipeline — token costs, the raw OpenAI API, messages, prompt templates, structured output and LCEL.
Oct 2026 – Oct 2026
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Completed
6 posts
Algorithm Interview 2026: Data Structures — Know Your Tools
Master the 6 data structures that appear in 80% of technical interviews. Each post goes deep on one structure — how it works under the hood, every interview pattern it unlocks, and the exact templates that win offers.
Mar 2026 – Mar 2026
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Completed
6 posts
Part 7 — Routing, Hooks, and Build Optimizations (Vite/Webpack)
Learn how to structure routing, master custom hooks, and optimize React builds using Vite and Webpack for production-grade apps.
Jan 2026 – Feb 2026
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Completed
6 posts
Part 0 — Web Fundamentals for Modern Full-Stack
Build a rock-solid foundation in HTML, CSS, JavaScript, and modern tooling to prepare for a professional full-stack journey using React, NestJS, and PostgreSQL.
Nov 2025 – Nov 2025
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