Total 52,636 skills, Backend Development has 4285 skills
Showing 12 of 4285 skills
PostHog feature flags for API applications
Create a new sequentially numbered database migration with up/down SQL files
Complete, AI-ready playbook to migrate Motoko projects from mo:base to mo:core — phases, renames, data structure changes, agent strategy, verification scripts, upgrade tests, and production rollout.
Idiomatic Go design patterns: functional options, builder, factory, strategy, middleware chain, pub/sub, and other patterns adapted for Go's type system. Use when: "design pattern", "functional options", "builder pattern", "factory pattern", "strategy pattern", "middleware chain", "option pattern", "how to structure this". Do NOT use for: interface design principles (use go-interface-design), package layout (use go-architecture-review), or concurrency patterns (use go-concurrency-review).
WeChat Pay Entrusted Withholding Access Solution, covering the full link of pure signing, signing during payment, deduction application, pre-deduction notification, contract termination, query, refund, and reconciliation under the scenarios of periodic deduction / postpaid service with upfront benefits. It provides five capabilities: product selection/sample code/business quick reference/access quality assessment/troubleshooting. Use when user mentions "Entrusted Withholding", "Periodic Deduction", "Periodic Fee Deduction", "Auto-renewal", "Postpaid Service with Upfront Benefits", "Password-free Payment", "Pure Signing", "Signing During Payment", "Pre-deduction Notification", "Deduction Application", or asks to "access Entrusted Withholding", "request Entrusted Withholding interface sample code", "troubleshoot Entrusted Withholding issues".
MySQL and MariaDB schema, query, indexing, transaction, replication, and connection-pool patterns for production backends.
Diagnoses and optimises slow SQL queries using EXPLAIN ANALYZE. Covers identifying bottlenecks (sequential scans, bad estimates, heap fetches), index strategy, query rewrites, and verification. Invoked when the user asks to optimize a query, fix a slow database query, or improve database performance.
Develop STM32 firmware on CubeMX-generated HAL projects, including peripheral configuration, BSP driver structure, interrupt-safe code, and hardware-aware troubleshooting. Use when Codex needs STM32 HAL implementation guidance rather than generic C advice.
Use when designing, implementing, or reviewing an embedded accounting engine inside a SaaS, ERP, POS, inventory, payroll, school, clinic, NGO, marketplace, or mobile-money-heavy system. Covers one append-only general ledger, one LedgerPostingService write path, mapping-layer account resolution, IFRS/IFRS for SMEs defaults, subledger tagging, idempotent posting, reversing journals, period locks, audit trails, report projections, and accounting integrity tests.
Provides guidance on new System.Text.Json APIs introduced in .NET 11. It covers typed JsonTypeInfo access via GetTypeInfo<T> and TryGetTypeInfo<T> on JsonSerializerOptions, and the new JsonNamingPolicy.PascalCase static property. Use when serializing or deserializing JSON in .NET 11 applications and needing typed metadata access or PascalCase property naming.
Use when you need to apply Java concurrency best practices — including thread safety fundamentals, ExecutorService thread pool management, concurrent design patterns like Producer-Consumer, asynchronous programming with CompletableFuture, immutability and safe publication, deadlock avoidance, virtual threads, scoped values, backpressure, cancellation discipline, and observability for concurrent systems. This should trigger for requests such as Review Java code for concurrency. Part of cursor-rules-java project
C++ library for reducing tail latency in RAM reads by hedging across multiple DRAM channels with uncorrelated refresh schedules