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Practical code notes, tools, and guided learning for developers.

Practical guides, developer tools, and tutorials for modern web developers, with the same focused tone across writing, utilities, and learning tracks.

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Articles, utilities, and guided learning tracks shaped like a developer workspace: deliberate, practical, and fast to scan in both dark and light mode.

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Recent Articles

Your AI Coding Agent Needs a Permission Contract, Not Just a Prompt

developer tools

Your AI Coding Agent Needs a Permission Contract, Not Just a Prompt

A practical guide to writing CLAUDE.md as a permission contract for AI coding agents, covering tool tiers, hard stops, failure behavior, and MCP server security.

May 6, 202610 min read

AI Tools

AI Coding Tools Pricing in 2026 - The Flat-Rate Era Is Over

Every major AI coding tool raised its price or restructured plans in April 2026. Here is what changed, why agentic workflows broke the old economics, and how to figure out what you should actually be paying.

Apr 28, 2026 03

58

Articles

06

Featured Tools

02

Tutorial Series

developer tools

Focus

toolchain_index

Developer Toolchain

Color Contrast Checker

Check WCAG contrast ratio between two colors.

Keyboard Navigation Test

Test accessibility using keyboard-only input.

guided_learning

Mastery Series

34 lessons

Git Mastery

Master Git fundamentals, collaboration flows, and practical troubleshooting paths.

17 lessons

Complete React Tutorial

Learn React from first principles through hooks, components, state, and routing lessons.

typed content

guided learning

AI agents

GitHub Agentic Workflows Safe-Outputs Architecture for Automated Code Review

Set up production-ready AI code review using GitHub Agentic Workflows' safe-outputs security model, threat detection, and compile-time constraints.

Apr 28, 2026

developer tools

AI code review in 2026 - a workflow that survives the PR flood

AI is generating more pull requests than humans can review. The fix isn't picking the best AI code review tool — it's combining the right ones.

AI agents

Gemini CLI Subagents vs Claude Code: How They Actually Work

Gemini CLI shipped subagents in April 2026. Here is an architectural comparison with Claude Code covering orchestration, context capacity, and permission controls.

Accessibility

Image Accessibility Checker

Verify if images have proper alt text.

Free Online Text Comparison Tool

Online Text Diff Checker – Compare Text, JSON, CSS Side-by-Side

Readability Checker

Measure the readability of your text.

CSV to XML

Convert CSV rows into XML format.