Aaronontheweb

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

Design .NET types for performance. Seal classes, use readonly structs, prefer static pure functions, avoid premature enumeration, and choose the right collection types.

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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.

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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.

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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.

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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.

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

Provides guidance for implementing OpenTelemetry instrumentation in .NET codebases, covering tracing (Activities/Spans), metrics, logs, naming conventions, error handling, performance, SDK setup, resources, context propagation, and API design best practices.

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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.

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

Build reactive/event-driven C# with R3 (Cysharp's modern reimplementation of Reactive Extensions). Covers the Observable /Observer model, the OnErrorResume error contract, async dispatch with AwaitOperation, Task/IAsyncEnumerable integration, TimeProvider/FrameProvider scheduling, the concurrency contract, and how R3…

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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.

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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).

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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.

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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.

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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.

Aaronontheweb/dotnet-skills

Skill Claude CodeCodex

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

Aaronontheweb/dotnet-cursor-rules

Cursor rule Cursor

A meta-rule for using Cursor to update .mdc file in this repository.

Aaronontheweb/dotnet-cursor-rules

Cursor rule

Designing benchmarks for measuring .NET performance.