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HK Lee

solo web developer

Joined Joined on  Personal website https://pockit.tools github website
Signals en JavaScript: Por Qué Todos los Frameworks los Están Adoptando (Y Qué Significa para React)
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Signals en JavaScript: Por Qué Todos los Frameworks los Están Adoptando (Y Qué Significa para React)

#javascript #signals #react #angular
1
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12 min read

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Fine-Tuning Open-Source LLMs with QLoRA and Unsloth: The Complete 2026 Guide
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Fine-Tuning Open-Source LLMs with QLoRA and Unsloth: The Complete 2026 Guide

#ai #llm #qlora #unsloth
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19 min read
OAuth 2.1 Is Here: What Changed, What's Deprecated, and How to Migrate Your App
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OAuth 2.1 Is Here: What Changed, What's Deprecated, and How to Migrate Your App

#oauth #authentication #pkce #typescript
1
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14 min read
Running LLMs in the Browser: WebGPU, Transformers.js, and Chrome's Built-in AI Explained
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Running LLMs in the Browser: WebGPU, Transformers.js, and Chrome's Built-in AI Explained

#ai #webgpu #llm #onnx
1
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14 min read
Building AI-Powered Search for Your App: Vector Search, Hybrid Search, and Semantic Ranking from Scratch
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Building AI-Powered Search for Your App: Vector Search, Hybrid Search, and Semantic Ranking from Scratch

#ai #pgvector #postgres #typescript
1
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13 min read
Agentic RAG: How AI Agents That Search, Reason, and Act Are Replacing Traditional Retrieval Pipelines
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Agentic RAG: How AI Agents That Search, Reason, and Act Are Replacing Traditional Retrieval Pipelines

#ai #rag #llm #agents
2
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14 min read
TypeScript Generics Demystified: From Confusion to Mastery (With Real-World Patterns)
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TypeScript Generics Demystified: From Confusion to Mastery (With Real-World Patterns)

#typescript #generics #javascript
1
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10 min read
Next.js Partial Prerendering (PPR) Deep Dive: How It Works, When to Use It, and Why It Changes Everything
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Next.js Partial Prerendering (PPR) Deep Dive: How It Works, When to Use It, and Why It Changes Everything

#nextjs #react #ppr
2
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12 min read
Migrating to Zod 4: The Complete Guide to Breaking Changes, Performance Gains, and New Features
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Migrating to Zod 4: The Complete Guide to Breaking Changes, Performance Gains, and New Features

#zod #typescript #javascript #node
1
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11 min read
Building Custom MCP Servers in TypeScript: The Complete 2026 Guide
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Building Custom MCP Servers in TypeScript: The Complete 2026 Guide

#mcp #typescript #ai #claude
1
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16 min read
OpenAI Agents SDK vs Google ADK vs LangGraph in 2026: The Definitive Framework Showdown
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OpenAI Agents SDK vs Google ADK vs LangGraph in 2026: The Definitive Framework Showdown

#ai #openai #googleadk #langgraph
1
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14 min read
How to Reduce AI Hallucinations in Production: Grounding, RAG, and Guardrails That Actually Work
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How to Reduce AI Hallucinations in Production: Grounding, RAG, and Guardrails That Actually Work

#ai #llm #hallucinations #rag
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16 min read
How to Build AI Agents That Actually Remember: Memory Architecture for Production LLM Apps
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How to Build AI Agents That Actually Remember: Memory Architecture for Production LLM Apps

#ai #llm #rag #langchain
1
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16 min read
PostgreSQL Query Performance: The Complete EXPLAIN ANALYZE Guide for Developers Who've Had Enough
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PostgreSQL Query Performance: The Complete EXPLAIN ANALYZE Guide for Developers Who've Had Enough

#postgres #database #performance #sql
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14 min read
Context Engineering: The Most Important AI Skill Nobody's Teaching You
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HK Lee

Context Engineering: The Most Important AI Skill Nobody's Teaching You

#ai #llm #contextengineering #promptengineering
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14 min read
LLM Evaluation and Testing: How to Build an Eval Pipeline That Actually Catches Failures Before Production
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HK Lee

LLM Evaluation and Testing: How to Build an Eval Pipeline That Actually Catches Failures Before Production

#ai #llm #evaluation
1
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14 min read
RAG vs Fine-Tuning vs Long Context: How to Choose the Right LLM Architecture in 2026
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HK Lee

RAG vs Fine-Tuning vs Long Context: How to Choose the Right LLM Architecture in 2026

#ai #rag #llm
1
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14 min read
MCP vs A2A: The Complete Guide to AI Agent Protocols in 2026
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HK Lee

MCP vs A2A: The Complete Guide to AI Agent Protocols in 2026

#ai #mcp #a2a #llm
4
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14 min read
How to Cut Your LLM API Costs by 90%: Caching, Routing, and Prompt Engineering That Actually Work
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HK Lee

How to Cut Your LLM API Costs by 90%: Caching, Routing, and Prompt Engineering That Actually Work

#ai #llm #openai #anthropic
1
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14 min read
OpenAI Codex vs Claude Code in 2026: The Honest Comparison Nobody's Making
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OpenAI Codex vs Claude Code in 2026: The Honest Comparison Nobody's Making

#ai #openai #codex #claudecode
1
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17 min read
The SQLite Renaissance: Why the World's Most Deployed Database Is Taking Over Production in 2026
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The SQLite Renaissance: Why the World's Most Deployed Database Is Taking Over Production in 2026

#sqlite #turso #cloudflare #libsql
1
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13 min read
Docker vs Podman in 2026: The Complete Migration Guide Nobody Asked For (But Everyone Needs)
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Docker vs Podman in 2026: The Complete Migration Guide Nobody Asked For (But Everyone Needs)

#docker #podman #containers #devops
1
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14 min read
Next.js vs Remix vs Astro vs SvelteKit in 2026: The Definitive Framework Decision Guide
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Next.js vs Remix vs Astro vs SvelteKit in 2026: The Definitive Framework Decision Guide

#nextjs #remix #astro #sveltekit
3
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16 min read
TypeScript 7 and Project Corsa: Everything You Need to Know About the 10x Faster Go Rewrite
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TypeScript 7 and Project Corsa: Everything You Need to Know About the 10x Faster Go Rewrite

#typescript #go #javascript
1
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12 min read
Supabase vs Firebase in 2026: The Honest Comparison After Using Both in Production
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Supabase vs Firebase in 2026: The Honest Comparison After Using Both in Production

#supabase #firebase #baas #postgres
1
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17 min read
Cursor vs Windsurf vs Claude Code in 2026: The Honest Comparison After Using All Three
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Cursor vs Windsurf vs Claude Code in 2026: The Honest Comparison After Using All Three

#ai #cursor #windsurf #claudecode
6
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13 min read
Drizzle ORM vs Prisma in 2026: The Honest Comparison Nobody Is Making
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Drizzle ORM vs Prisma in 2026: The Honest Comparison Nobody Is Making

#typescript #drizzle #prisma #orm
3
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12 min read
Node.js Native TypeScript: The Complete Guide to Running .ts Files Without a Compiler
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Node.js Native TypeScript: The Complete Guide to Running .ts Files Without a Compiler

#typescript #javascript #node
1
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10 min read
REST vs GraphQL vs tRPC vs gRPC in 2026: The Definitive Guide to Choosing Your API Layer
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REST vs GraphQL vs tRPC vs gRPC in 2026: The Definitive Guide to Choosing Your API Layer

#rest #graphql #trpc #grpc
1
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10 min read
LLM Structured Output in 2026: Stop Parsing JSON with Regex and Do It Right
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LLM Structured Output in 2026: Stop Parsing JSON with Regex and Do It Right

#llm #openai #anthropic #gemini
Comments 2
15 min read
Kubernetes vs Serverless in 2026: The Honest Decision Guide Nobody Gives You
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Kubernetes vs Serverless in 2026: The Honest Decision Guide Nobody Gives You

#kubernetes #serverless #devops #docker
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13 min read
WebAssembly Beyond the Browser: WASI 2.0, the Component Model, and Why Wasm Is About to Change Everything
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WebAssembly Beyond the Browser: WASI 2.0, the Component Model, and Why Wasm Is About to Change Everything

#webassembly #wasi #componentmodel #edgecomputing
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11 min read
Rust Is Eating the JavaScript Toolchain: Rolldown, Oxc, Rspack, and the End of JS-Based Build Tools
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HK Lee

Rust Is Eating the JavaScript Toolchain: Rolldown, Oxc, Rspack, and the End of JS-Based Build Tools

#rust #javascript #vite #rolldown
3
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10 min read
LangGraph vs CrewAI vs AutoGen: The Complete Multi-Agent AI Orchestration Guide for 2026
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HK Lee

LangGraph vs CrewAI vs AutoGen: The Complete Multi-Agent AI Orchestration Guide for 2026

#ai #langgraph #crewai #autogen
2
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12 min read
React Compiler Deep Dive: How Automatic Memoization Eliminates 90% of Performance Optimization Work
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HK Lee

React Compiler Deep Dive: How Automatic Memoization Eliminates 90% of Performance Optimization Work

#react #reactcompiler #memoization #javascript
1
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11 min read
React 19 use() Hook Deep Dive: The Game-Changer for Data Fetching
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HK Lee

React 19 use() Hook Deep Dive: The Game-Changer for Data Fetching

#react #react19 #suspense #javascript
3
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8 min read
Bun 1.2 Deep Dive: Built-in SQLite, S3, and Why It Might Actually Replace Node.js
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HK Lee

Bun 1.2 Deep Dive: Built-in SQLite, S3, and Why It Might Actually Replace Node.js

#bunjs #node #javascript #sqlite
1
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7 min read
LLM Prompt Injection Attacks: The Complete Security Guide for Developers Building AI Applications
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HK Lee

LLM Prompt Injection Attacks: The Complete Security Guide for Developers Building AI Applications

#llm #security #ai #promptinjection
2
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20 min read
TypeScript 5.5's Game-Changing Feature: Inferred Type Predicates Explained
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TypeScript 5.5's Game-Changing Feature: Inferred Type Predicates Explained

#typescript #javascript #typescript5
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8 min read
Why Your React App Re-renders Too Much: A Deep Dive into Performance Optimization
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Why Your React App Re-renders Too Much: A Deep Dive into Performance Optimization

#react #javascript #usecallback #usememo
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8 min read
Why Your React App Feels Slow: Fixing Performance with Web Workers
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Why Your React App Feels Slow: Fixing Performance with Web Workers

#webworkers #react #javascript #multithreading
1
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12 min read
Edge Runtime vs Node.js Runtime: When Your Serverless Functions Mysteriously Fail
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Edge Runtime vs Node.js Runtime: When Your Serverless Functions Mysteriously Fail

#edgeruntime #node #nextjs #vercel
1
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12 min read
Why AI-Generated Code Breaks in Production: A Deep Debugging Guide
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Why AI-Generated Code Breaks in Production: A Deep Debugging Guide

#ai #llm
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12 min read
Claude Code Deep Dive: The Terminal-First AI Coding Agent That's Changing How Developers Work
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Claude Code Deep Dive: The Terminal-First AI Coding Agent That's Changing How Developers Work

#claude #ai #codingassistant #anthropic
2
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11 min read
React 19 Server Actions Security Crisis: A Complete Guide to CVE-2025-55182 and How to Protect Your App
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React 19 Server Actions Security Crisis: A Complete Guide to CVE-2025-55182 and How to Protect Your App

#react #security #nextjs
1
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17 min read
Turbopack in 2026: The Complete Guide to Next.js's Rust-Powered Bundler
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Turbopack in 2026: The Complete Guide to Next.js's Rust-Powered Bundler

#turbopack #nextjs #webpack #rust
1
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8 min read
Biome: The ESLint and Prettier Killer? Complete Migration Guide for 2026
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Biome: The ESLint and Prettier Killer? Complete Migration Guide for 2026

#biome #eslint #prettier #javascript
Comments 1
8 min read
Vibe Coding in 2026: The Complete Guide to AI-Pair Programming That Actually Works
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Vibe Coding in 2026: The Complete Guide to AI-Pair Programming That Actually Works

#ai #vibecoding #cursor #llm
Comments 2
9 min read
ESLint 10 Migration Guide: Everything You Need to Know About the Biggest Update Yet
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ESLint 10 Migration Guide: Everything You Need to Know About the Biggest Update Yet

#eslint #javascript #typescript #linting
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6 min read
GitHub Actions in 2026: The Complete Guide to Monorepo CI/CD and Self-Hosted Runners
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GitHub Actions in 2026: The Complete Guide to Monorepo CI/CD and Self-Hosted Runners

#githubactions #cicd #github #monorepo
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8 min read
Zod vs Valibot vs ArkType in 2026: The Ultimate TypeScript Schema Validation Showdown
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Zod vs Valibot vs ArkType in 2026: The Ultimate TypeScript Schema Validation Showdown

#typescript #zod #valibot #arktype
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9 min read
The Async/Await Pitfalls You're Still Making in 2026: A Complete JavaScript Debugging Guide
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The Async/Await Pitfalls You're Still Making in 2026: A Complete JavaScript Debugging Guide

#javascript #asyncawait #debugging #node
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12 min read
pnpm vs npm vs yarn vs Bun: The 2026 Package Manager Showdown
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HK Lee

pnpm vs npm vs yarn vs Bun: The 2026 Package Manager Showdown

#pnpm #npm #yarn #bunjs
3
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9 min read
GPT-5 vs Claude Opus 4.5 vs Gemini 3: The 2026 AI Coding Model Showdown
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HK Lee

GPT-5 vs Claude Opus 4.5 vs Gemini 3: The 2026 AI Coding Model Showdown

#gpt #claude #gemini #ai
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8 min read
Vercel AI SDK Complete Guide: Building Production-Ready AI Chat Apps with Next.js
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HK Lee

Vercel AI SDK Complete Guide: Building Production-Ready AI Chat Apps with Next.js

#vercelaisdk #nextjs #ai #chatgpt
Comments 2
13 min read
Mastering Cursor Rules: The Ultimate Guide to .cursorrules and Memory Bank for 10x Developer Productivity
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HK Lee

Mastering Cursor Rules: The Ultimate Guide to .cursorrules and Memory Bank for 10x Developer Productivity

#cursor #aicoding #promptengineering #llm
Comments 1
12 min read
Tailwind CSS v4 Migration Guide: Everything That Changed and How to Upgrade (2026)
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HK Lee

Tailwind CSS v4 Migration Guide: Everything That Changed and How to Upgrade (2026)

#tailwindcss #css #frontend
1
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7 min read
PostgreSQL vs MySQL vs MongoDB in 2026: The Honest Comparison Nobody Asked For
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HK Lee

PostgreSQL vs MySQL vs MongoDB in 2026: The Honest Comparison Nobody Asked For

#database #postgres #mysql #mongodb
Comments
8 min read
Rust for JavaScript Developers: A Practical Guide to Your First 1000 Lines (2026)
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Rust for JavaScript Developers: A Practical Guide to Your First 1000 Lines (2026)

#rust #javascript #typescript #programminglanguages
2
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9 min read
Why Your Next.js Cache Isn't Working (And How to Fix It in 2026)
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Why Your Next.js Cache Isn't Working (And How to Fix It in 2026)

#nextjs #caching #approuter #react
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11 min read
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