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Complete Stripe payments integration with subscriptions, webhooks, and customer portal. Use when adding billing to a Saa...

Implement cursor-based and offset pagination for APIs. Covers efficient database queries, stable sorting, and pagination...

Implement API versioning strategies for backward compatibility. Covers URL versioning, header versioning, and deprecatio...

Production-safe error handling that logs full details server-side while exposing only generic, safe messages to users. P...

Protect routes with Next.js middleware. Check authentication once, protect routes declaratively. Supports public routes,...

Template-based AI prompt engine with YAML templates, brand kit injection, input sanitization for security, and token-eff...

Validate API requests with schemas, sanitization, and helpful error messages. Covers Zod, Joi, and Pydantic patterns.

Hierarchical exception system with HTTP status codes, machine-readable error codes, and structured responses for consist...

Progressive Web App setup with manifest, mobile meta tags, safe area handling for notched devices, and install prompts f...

Fixed timestep game loop with interpolation for frame-rate independent physics. Separates physics updates from rendering...

Server-authoritative tick system for multiplayer games with lag compensation, anti-cheat validation, and deterministic p...

Implement robust background job processing with dead letter queues, retries, and state machines. Use when building async...