Coding & Development

Senior UI/UX designer transforming product requirements into professional design solutions. Use when users need: (1) Page structure and information architecture, (2) UI layout and components, (3) Color schemes and visual specs, (4) Design specification docs, (5) User flow diagrams. Triggers: UI design, page design, interface design, interaction design, design specs, layout. | 资深UI/UX设计师，将需求转化为设计方案。触发词：UI设计、页面设计、界面设计、交互设计、设计规范、页面布局、设计方案。

Transform product requirements into executable technical architecture. Use when users request: (1) Technical/system architecture design, (2) Tech stack selection, (3) Architecture from PRD, (4) Deployment strategy, (5) Architecture review. Provides workflows from requirements to deployment with tech stack templates. Triggers: architecture, tech stack, system design, deployment, infrastructure. | 将产品需求转化为技术架构。触发词：架构设计、技术架构、系统架构、技术选型、部署方案、基础设施。

Senior product manager for end-to-end product development from requirements to design. Use when users need: (1) Requirements analysis and product direction, (2) User personas and scenario analysis, (3) Feature and interaction design, (4) PRD writing, (5) Feasibility assessment. Triggers: product design, requirements, user persona, PRD, feature planning, MVP, user story. | 资深产品经理，负责需求分析到产品设计全流程。触发词：产品设计、需求分析、用户画像、PRD、功能规划、MVP、用户故事、产品方案。

Comprehensive database design tool creating complete schemas with tables, fields, indexes, and ER diagrams. Use when users request database design for any system. Generates Markdown docs, SQL scripts, and DrawDB-compatible JSON/DBML files. Supports MySQL, PostgreSQL, SQL Server. Triggers: database design, schema, ER diagram, SQL, data model. | 全面的数据库设计工具，创建完整的数据库架构。触发词：数据库设计、数据库架构、ER图、SQL、数据模型、表设计。

Personalized academic writing assistant for university assignments in Chinese and English. Use when users need help writing/revising academic reports, project docs, technical analyses, research reviews, or case studies. Produces natural prose avoiding AI markers. Triggers: academic writing, assignment, report, technical analysis, research review, case study. | 个性化学术写作助手，适用于中英文大学作业。触发词：学术写作、作业、报告、技术分析、研究综述、案例研究、项目文档。

Snapshot test email templates using Verify to catch regressions. Validates rendered HTML output matches approved baseline. Works with MJML templates and any email renderer.

Write integration tests using TestContainers for .NET with xUnit. Covers infrastructure testing with real databases, message queues, and caches in Docker containers instead of mocks.

Use Verify for snapshot testing in .NET. Approve API surfaces, HTTP responses, rendered emails, and serialized outputs. Detect unintended changes through human-reviewed baseline files.

Use Slopwatch to detect LLM reward hacking in .NET code changes. Run after every code modification to catch disabled tests, suppressed warnings, empty catch blocks, and other shortcuts that mask real problems.

Create and maintain AGENTS.md / CLAUDE.md snippet indexes that route tasks to the correct dotnet-skills skills and agents (including compressed Vercel-style indexes).

Choose the right serialization format for .NET applications. Prefer schema-based formats (Protobuf, MessagePack) over reflection-based (Newtonsoft.Json). Use System.Text.Json with AOT source generators for JSON scenarios.

Modern .NET project structure including .slnx solution format, Directory.Build.props, central package management, SourceLink, version management with RELEASE_NOTES.md, and SDK pinning with global.json.

Cache Playwright browser binaries in CI/CD pipelines (GitHub Actions, Azure DevOps) to avoid 1-2 minute download overhead on every build.

Write UI tests for Blazor applications (Server or WebAssembly) using Playwright. Covers navigation, interaction, authentication, selectors, and common Blazor-specific patterns.

Manage NuGet packages using Central Package Management (CPM) and dotnet CLI commands. Never edit XML directly - use dotnet add/remove/list commands. Use shared version variables for related packages.

Build responsive email templates using MJML markup language. Compiles to cross-client HTML that works in Outlook, Gmail, and Apple Mail. Includes template renderer, layout patterns, and variable substitution.

Organize DI registrations using IServiceCollection extension methods. Group related services into composable Add* methods for clean Program.cs and reusable configuration in tests.

Microsoft.Extensions.Options patterns including IValidateOptions, strongly-typed settings, validation on startup, and the Options pattern for clean configuration management.

Workflow for publishing skills and agents to the dotnet-skills Claude Code marketplace. Covers adding new content, updating plugin.json, validation, and release tagging.

Managing local .NET tools with dotnet-tools.json for consistent tooling across development environments and CI/CD pipelines.

Understand implementation details of .NET code by decompiling assemblies. Use when you want to see how a .NET API works internally, inspect NuGet package source, view framework implementation, or understand compiled .NET binaries.

Entity Framework Core best practices including NoTracking by default, query splitting for navigation collections, migration management, dedicated migration services, and common pitfalls to avoid.

Diagnose and fix .NET HTTPS dev certificate trust issues on Linux. Covers the full certificate lifecycle from generation to system CA bundle inclusion, with distro-specific guidance for Ubuntu, Fedora, Arch, and WSL2.

Database access patterns for performance. Separate read/write models, avoid N+1 queries, use AsNoTracking, apply row limits, and never do application-side joins. Works with EF Core and Dapper.