Every article tagged Architecture, in one place.
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FastAPI's Depends lets endpoints declare what they need (a database session, the current user, pagination settings) and FastAPI provides it. Dependencies can depend on other dependencies, and they're easy to replace in tests. A simple dependency from typing im...
When two CSS rules conflict, specificity usually decides who wins. That leads to !important and ever-longer selectors. Cascade layers add a level above specificity: rules in a later layer beat rules in an earlier layer, no matter how specific. Declare the orde...
Authentication answers "who are you?". Authorisation answers "may you do this?". As apps grow, a clear authorisation model saves you from permission checks scattered everywhere. RBAC: role-based access control const PERMISSIONS = { admin: ['post:create', 'post...
Agents are exciting, but they cost more, are slower and are harder to test than fixed code. Many features are better built as workflows : LLM calls arranged in a flow that your code controls. Start with the simplest thing One LLM call - classification, summari...
Short answer: prop drilling is passing props through several intermediate components that don't use them, just to reach a deeply nested child. Fix it with composition first, then Context , then a state library for complex shared state. The problem <App user={u...
A single main.py is perfect for a prototype. As the API grows, split it by feature so each area of the product lives together. A feature-based layout app/ main.py # creates the app, includes routers config.py # settings from environment db.py # engine, session...
