CheatCoders

AI Code Review Bots: IAM, Secrets, and Least-Privilege Pipelines

AI code review bots fail security reviews when they hold monorepo admin PATs and unrestricted Bedrock access. Build least-privilege pipelines: GitHub App tokens, scoped IAM, Secrets Manager, and ephemeral jobs that can read a PR diff — nothing else.

AI AWS Machine Learning

Bedrock Prompt Caching and Batch Inference: Cut Latency and Cost

Bedrock bills you twice for the same system prompt unless you cache it — and charges full freight for offline jobs unless you batch. Use prompt caching for hot interactive prefixes and Batch Inference for deferred work; never confuse the two.

AI AWS Machine Learning

RAG on AWS: OpenSearch vs Aurora pgvector for Codebase Chat

Codebase chat RAG fails when you pick a vector store for demos, not query shape. Compare OpenSearch k-NN vs Aurora PostgreSQL pgvector on latency, filters, hybrid search, and ops — then pick for your retrieval SLOs and team skills.

AI AWS Machine Learning

LLM Coding Agents on AWS: Safe Tool Sandboxes with Lambda

LLM coding agents need real tools — shell, git, tests — without owning your account. Isolate each tool hop in a short-lived Lambda sandbox with IAM fences, network deny-by-default, and hard time/CPU budgets so agent autonomy stays recoverable.

AI AWS Machine Learning

Amazon Bedrock Agents: Tool Use, Memory, and Production Guardrails

Bedrock Agents fail in production when tools are over-privileged, memory is unbounded, and guardrails are bolted on late. Wire action groups, session memory, and Guardrails at the agent boundary — then measure p99 and tool-error rates before you ship.

JavaScript

CSS Pseudo-Classes and Pseudo-Elements: The Complete Styling Guide

CSS pseudo-classes and pseudo-elements unlock powerful styling without JavaScript or extra HTML elements. This guide covers :has(), :not(), ::before/:after, and every production pattern.

Node.js

Express.js Best Practices: Build Production-Ready APIs With Node.js

Express.js is easy to start with but easy to build wrong. These production practices cover middleware ordering, security, validation, and the structure that scales to 100+ routes.

Python

Python Testing With pytest: From First Test to Advanced Fixtures and Mocking

pytest is the most powerful Python testing framework. This guide covers fixtures, parametrize, mocking, conftest.py, and the patterns that give you real confidence in production code.

Python

Python Context Managers: Master the with Statement for Clean Resource Handling

Python context managers guarantee cleanup even when exceptions occur — for files, DB connections, locks, and any resource. This guide covers __enter__/__exit__ and the contextlib shortcuts.

JavaScript

React State Management: useState vs useReducer vs Context vs Zustand

React state management has many options and the wrong choice creates unnecessary complexity. This guide shows when to use useState, useReducer, Context, and Zustand.