Featured image of post What is the Survival Guide from Vibe Coding to 'AI Agent Engineering'? The Ultimate Value of 'AI Agent Engineering' and 'Understanding' that Cannot Be Outsourced! What We Should Really Invest in is Our 'Understanding of Underlying Principles' and 'Product Taste'.

What is the Survival Guide from Vibe Coding to 'AI Agent Engineering'? The Ultimate Value of 'AI Agent Engineering' and 'Understanding' that Cannot Be Outsourced! What We Should Really Invest in is Our 'Understanding of Underlying Principles' and 'Product Taste'.

AI grandmaster Andrej Karpathy reveals software development entering the Software 3.0 era. In the shift from Vibe Coding to Agentic Engineering, human engineers reflect on the irreplaceable value of understanding and taste in the era of outsourcing.

Featured image of post Don't Be Fooled by SQLite's Casualness! What Are the Dynamic Type Pitfalls? Why Is ALTER TABLE Half-Baked? How to Build a Defensive Programming Architecture in Node.js for Painless Schema Upgrades?

Don't Be Fooled by SQLite's Casualness! What Are the Dynamic Type Pitfalls? Why Is ALTER TABLE Half-Baked? How to Build a Defensive Programming Architecture in Node.js for Painless Schema Upgrades?

SQLite adopts a dynamic, weak type system; shoving a string into an INTEGER column surprisingly won't throw an error. Understand SQLite's Type Affinity pitfalls, the impact of lacking native Boolean and Date types, ALTER TABLE limitations, the 'four-step recreate & move' safe upgrade strategy, and how to build defensive programming architectures with tools like TypeScript, Zod, and Prisma.

Featured image of post Stop Using PostgreSQL for Everything! What Are SQLite's Embedded Architecture and Zero-Config Advantages? Where Are SQLite's Limits? When Should You Choose SQLite, and When PostgreSQL?

Stop Using PostgreSQL for Everything! What Are SQLite's Embedded Architecture and Zero-Config Advantages? Where Are SQLite's Limits? When Should You Choose SQLite, and When PostgreSQL?

SQLite is the world's most widely deployed embedded database engine, featuring a single file, zero configuration, and no server installation. Understand the core architectural differences between SQLite and PostgreSQL, their respective use cases, and SQLite's limits (concurrent write locking, no cross-server capability, lack of permission management).

Featured image of post How to Choose Open Source Packages for Business Software? A Guide to License Risk Mitigation and Architecture from MIT, BSD to Apache 2.0

How to Choose Open Source Packages for Business Software? A Guide to License Risk Mitigation and Architecture from MIT, BSD to Apache 2.0

How to choose open-source licenses when developing business software? This article provides an in-depth analysis of the differences between MIT, BSD, Apache 2.0, and GPL, with a special focus on the importance of patent protection. It also offers architect-level defense strategies (such as the Adapter Pattern) to help you avoid open-source pitfalls.

Featured image of post Storing Currency in Databases: Should You Use DECIMAL or BIGINT?

Storing Currency in Databases: Should You Use DECIMAL or BIGINT?

When developing a payment system, what field type should you use for currency? This article explains why you should absolutely never use FLOAT, and how to choose between DECIMAL and BIGINT for a zero-error, high-performance currency storage system.

Featured image of post What's the Difference Between MIT, ISC, Apache, and GPL? A Guide to Avoiding License Pitfalls in Vibe Coding

What's the Difference Between MIT, ISC, Apache, and GPL? A Guide to Avoiding License Pitfalls in Vibe Coding

Always hesitating about which open-source license to choose? This straightforward guide explains the differences between MIT, ISC, Apache 2.0, and the infectious GPL, LGPL, and AGPL, as well as how to avoid license conflicts.

Featured image of post What's the Difference Between Git Worktree and Git Branch? When Should You Use Git Worktree?

What's the Difference Between Git Worktree and Git Branch? When Should You Use Git Worktree?

Halfway through a new feature and suddenly need to fix a bug? Annoyed by messy environments and build leftovers? This article shows you how Git Worktree acts like opening a 'branch store,' enabling true parallel development and environment isolation so your flow stays uninterrupted!

Featured image of post pnpm Cannot Find Store Directory? How to Change store-dir to Solve External Drive Issues

pnpm Cannot Find Store Directory? How to Change store-dir to Solve External Drive Issues

Have you ever encountered pnpm errors saying the Store directory cannot be found? If you set pnpm store on an external drive, this article teaches you how to quickly correct the store-dir path and rebuild project links.

Featured image of post What are EARS and BDD? Spec-Driven Development (SDD) for AI to Instantly Understand Your Needs in Vibe Coding

What are EARS and BDD? Spec-Driven Development (SDD) for AI to Instantly Understand Your Needs in Vibe Coding

Still struggling to communicate with AI? This article teaches you how to combine EARS requirement syntax and BDD behavioral specification driven development to create 'Rigorous Prompts', allowing AI to accurately produce high-quality code!