fundamentals▌

Foundational SEO principles covering E-E-A-T, Core Web Vitals, technical foundations, and content quality evaluation. \n \n E-E-A-T is a quality evaluation framework (not a direct ranking factor) that search engines use to assess experience, expertise, authoritativeness, and trustworthiness, especially for sensitive topics \n Core Web Vitals measure user experience (loading speed, interactivity, visual stability) and matter most when content quality is comparable \n Technical SEO ensures crawlab

Build production LangChain agents with create_agent(), tools, and middleware patterns. \n \n Use create_agent() with model, tools list, and system prompt; configure state persistence with checkpointer and thread_id for conversation memory across invocations \n Define tools via @tool decorator (Python) or tool() function (TypeScript) with clear descriptions so agents know when to call them \n Add middleware like HumanInTheLoopMiddleware for approval workflows, custom error handling, and human-in-

Comprehensive guide for migrating to and building with Next.js App Router (13+). \n \n Covers migration from Pages Router including file structure mapping, layout creation, metadata handling, and cleanup steps \n Explains App Router file conventions (page.tsx, layout.tsx, loading.tsx, error.tsx, route.ts) and routing patterns (dynamic routes, catch-all, route groups) \n Details Server Components as the default with async/await support, Client Components with 'use client' directive, and data fetc

Master core Java programming with production-quality patterns.

Optimization for AI-powered search engines.

Essential Three.js scene setup, cameras, renderers, and object hierarchies for 3D web graphics. \n \n Covers scene creation, three camera types (Perspective, Orthographic, Array), renderer configuration with tone mapping and shadow support, and the Object3D hierarchy system \n Includes right-handed coordinate system, transform operations (position, rotation, scale, quaternions), and local vs. world space conversions \n Provides math utilities for Vector3, Matrix4, Quaternion, Euler angles, and C