Coding standards, frameworks, refactoring, and code review (18.4K skills)
Use this skill to implement secure mobile app code or review existing code. It covers input validation, WebView settings, protected data storage, authentication, network security, and platform specific safeguards, with practical steps for reducing mobile security risks.
Use modern JavaScript features such as async/await, modules, and functional patterns to refactor older code, handle asynchronous work, and build readable data transformations. It also guides performance improvements and validation.
Plan and carry out gradual updates to legacy codebases, including framework migrations, dependency upgrades, and technical debt reduction. The guidance emphasizes preserving existing behavior, maintaining backward compatibility, and providing phased plans, tests, and rollback steps.
Build and improve Next.js applications with App Router patterns for Server Components, streaming, parallel and intercepting routes, data fetching, caching, and Server Actions. The skill also covers moving from Pages Router and implementing server-side or static rendering.
Plan and improve mobile apps built with React Native, Flutter, or native iOS and Android technologies. Get help with app architecture, device integrations, offline data sync, performance, testing, and store release workflows.
Get guidance for Java 21+ and Spring Boot 3.x development, from virtual threads and microservice architecture to testing and JVM performance tuning. Use it to plan implementations, compare design approaches, and address production concerns such as security and monitoring.
Plan a feature for web, mobile, and desktop apps by defining shared API contracts, guiding platform implementations, and checking feature parity. It covers architecture, integration, testing, and platform specific optimization.
Design a monorepo, where multiple projects share one repository, by choosing tools such as Nx, Turborepo, Bazel, or Lerna. Get workspace structure, dependency boundaries, caching, and task pipeline guidance for setup, code sharing, or faster CI builds.
Use this skill to set up or maintain Nx monorepos, where multiple apps and libraries live in one workspace. It covers project boundaries, dependency rules, build caching, generators, and running CI tasks only for projects affected by changes.
Use this skill to design NFT contracts and digital asset systems with ERC-721 or ERC-1155. It covers metadata, minting, royalties, soulbound and dynamic tokens, gas-conscious batch minting, and marketplace integration patterns.
Set up and manage a monorepo, where multiple applications and packages live in one repository. The skill covers Turborepo, Nx, and pnpm workspaces, helping organize shared dependencies, speed up builds and tests, migrate repositories, and manage package releases.
Build native iOS apps with Swift and SwiftUI, including app screens, data storage, networking, and UIKit integration. Get guidance on accessibility, performance, privacy, testing, and preparing app metadata and releases for the App Store.
Improve a project's setup, tools, and daily development steps. The skill helps identify slow or repetitive work and suggests practical changes such as scripts, Git hooks, IDE settings, and clearer setup guides.
Handle complex Git histories and branch workflows with rebase, cherry-pick, bisect, worktrees, and reflog. The skill helps clean up commits, move selected changes, find the commit that introduced a bug, work across branches, and recover lost work.
Use this skill to design, build, or review C#/.NET backends such as APIs and MCP servers. It covers async code, dependency injection, Entity Framework Core, Dapper, configuration, caching, error handling, and xUnit testing patterns.
Use this skill to start a Python backend with FastAPI. It provides project structure and implementation patterns for asynchronous REST APIs, dependency injection, middleware, and error handling, including setups that use PostgreSQL or MongoDB.
Prepare clearer pull requests with a concise summary, detailed change descriptions, validation information, and review checklists. The skill also helps assess risks, test coverage, review automation, and whether a large proposal should be split into smaller changes.
Investigate production incidents and recurring errors by organizing logs, timestamps, and affected services. Narrow down causes with targeted checks, validate findings with evidence, and propose fixes, tests, and prevention measures.
Coordinate a Git workflow from change review and testing through commit preparation, branch checks, and pull request drafting. Get structured guidance for verifying collaboration readiness, including Conventional Commit messages and feature branch or trunk-based workflows.
Plan incremental package upgrades by assessing breaking changes, compatibility, and risk. Get a prioritized update plan, migration steps for major changes, regression test guidance, and rollback procedures to help keep a project stable while dependencies are updated.
Plan a feature that spans database, backend, frontend, testing, and deployment. The workflow organizes API-first design, implementation, integration and security checks, and operations work into phases with expected artifacts and success criteria.
Design systems that store changes as immutable events, with separate models for writing and reading data. Use it to plan audit histories, time based queries, projections, and multi step workflows that may need compensation when a step fails.
Plan a codebase transition between frameworks, languages, versions, APIs, databases, or platforms. Receive a compatibility and risk analysis, phased migration steps, transformation examples, validation strategy, and rollback guidance to help preserve current behavior.
Plan event storage for event-sourced applications by comparing technologies and shaping schemas and access patterns. The guidance covers appending and reading event streams, ordering, concurrency checks, subscriptions, snapshots, and scaling considerations, with examples for common storage options.