Tutorials

Step-by-step guides with working code. Ship something by the end.

2026-04-13

REST API Error Handling Best Practices: Your 500s Are a Lie

REST API error handling best practices: build structured errors with RFC 9457, implemented in Express and Go — plus client-side consumption code.

2026-04-05

AI Assisted Refactoring: Patterns That Won't Break Production

AI assisted refactoring that won't break production. Three named patterns, a preflight checklist, and the trust-but-verify mindset that keeps code safe.

2026-04-02

Model Context Protocol MCP: Why It Matters (And When to Skip It)

Model Context Protocol MCP: what it solves, how it compares to REST, and when to skip it. A developer's practical guide to the three primitives and production gotchas.

2026-03-29

JWT vs Session Authentication: Pick Wrong and You'll Pay Later

JWT vs session authentication: sessions for monoliths, JWT for microservices, hybrid when unsure. The decision framework most tutorials skip.

2026-03-26

Agentic Coding Workflows: One Agent vs. Many (2026 Guide)

Agentic coding workflows: use multi-agent when tasks span isolated areas and take 2+ hours. For most work, one agent wins. A practical framework.

2026-03-22

API Authentication Patterns: The 2am JWT Revocation Problem

Not sure which API authentication pattern to use? This guide covers JWT vs sessions, security best practices, and when each approach actually makes sense.

2026-03-20

Server Components Explained: The Real Trade-offs Nobody Mentions

Not the React marketing version. When server components help, when they hurt, and 5 questions to ask before you migrate anything.

2026-03-18

PostgreSQL Performance Tuning: What Actually Moves the Needle

Skip the 50-parameter tuning guides. Here are the 3-4 PostgreSQL performance changes that actually matter: indexes, query patterns, and connection pooling.

2026-03-15

JavaScript Bundle Analyzer: Find Bloat Without Guessing

Set up bundle analyzers for Webpack, Vite, and Rollup in minutes. Read the treemap, spot bloat patterns, and fix them with concrete steps.

2026-03-14

Building with AI APIs: What Breaks After npm install

Skip the 'which API is best' debate. Streaming, error handling, and multi-provider patterns that matter when building with AI APIs in production.