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API design principles and decision-making for 2025. Learn to THINK, not copy fixed patterns.

Interfaces belong in the package that consumes values, not the package that implements them. Return concrete (usually pointer or struct) types from constructors so new methods can be added without refactoring.

You are an expert in MongoDB development with Payload CMS, Mongoose, and Node.js.

Persona: You are a Go logging architect. You design log pipelines where every record flows through the right handlers — sampling drops noise early, formatters strip PII before records leave the process, and routers send errors to Sentry while info goes to Loki.

web-scraping

Write and debug JavaScript code in n8n Code nodes with proper data access and return formatting. \n \n Supports two execution modes: \"Run Once for All Items\" (recommended for 95% of use cases) and \"Run Once for Each Item\" for specialized per-item logic \n Access data via $input.all() , $input.first() , or $input.item ; always return array format [{json: {...}}] \n Built-in helpers include $helpers.httpRequest() for HTTP calls, DateTime (Luxon) for date operations, and $jmespath() for JSON qu

Version: 2.1.0 | Last Updated: 2025-01-27

Master core Java programming with production-quality patterns.

Lightweight Google Calendar integration with standalone OAuth authentication. No MCP server required.

ES6+ syntax and functional programming patterns for writing clean, modern JavaScript. \n \n Master arrow functions, destructuring, spread operators, template literals, and enhanced object syntax for concise, readable code \n Implement async/await and Promise patterns for handling asynchronous operations, with combinators like Promise.all and Promise.race \n Apply functional programming techniques including map, filter, reduce, higher-order functions, composition, and pure functions for data tran