StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Audit and fix classic ADO.NET data-access code (SqlConnection / SqlCommand / SqlDataReader / DataSet) on .NET Framework. Use this skill whenever the user shares raw ADO.NET code, a DAL / repository built on SqlCommand, stored-proc calls, string-concatenated SQL, or mentions SQL injection, parameterized queries…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Audit C#/.NET code for async/await anti-patterns and concurrency bugs. Use this skill whenever the user shares async C# code or asks about deadlocks, async void, .Result/.Wait(), blocking calls, ConfigureAwait, sync-over-async, fire-and-forget tasks, CancellationToken usage, or "why does my async code hang/deadlock".…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Design ASP.NET Core authorization — policy-based, role-based, and claims/requirement-based with custom authorization handlers and resource-based checks. Use this skill whenever the user wants authorization policies, role/claim checks, custom AuthorizationHandler, resource-based authorization, permission checks, or…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Set up BenchmarkDotNet for a .NET project and interpret the results — proper benchmark classes, memory diagnostics, baselines, and reading ns/op + allocations. Use this skill whenever the user wants to benchmark code, measure performance, compare two implementations, set up BenchmarkDotNet, or asks "which is faster /…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Add the right caching to a .NET app — IMemoryCache, distributed cache, or HybridCache (.NET 9+) — with correct keys, expiration, stampede protection, and invalidation. Use this skill whenever the user wants caching, to cache a query/response, IMemoryCache, Redis/distributed cache, HybridCache, output caching, or asks…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Generate a CI/CD pipeline for a .NET app — GitHub Actions or Azure DevOps — with restore, build, test, coverage, vulnerability scan, container build, and deploy stages. Use this skill whenever the user wants a CI/CD pipeline, GitHub Actions workflow, Azure DevOps YAML, build/test automation, a release pipeline, or…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Scaffold a .NET solution using Clean Architecture or Vertical Slice Architecture. Use this skill whenever the user wants to start a new .NET project/solution, structure an existing one, add a new feature/use-case/slice, set up layers (Domain, Application, Infrastructure, API), wire up CQRS/MediatR, or asks "how should…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Run the whole toolkit against a .NET repo and produce a single scored "health dashboard" - an overall score plus per-category scores (security, architecture, EF/database, performance, observability, testing, dependencies, code quality), each with findings and the top fixes. Use this skill whenever the user wants a…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Add correlation-ID middleware to ASP.NET Core so every request has a traceable id flowing through logs, downstream HTTP calls, and messaging. Use this skill whenever the user wants a correlation id, request id, to trace a request across services in logs, propagate an id to downstream calls, or asks "how do I add a…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Set up CQRS with MediatR (or a thin custom dispatcher) in an ASP.NET Core project — commands, queries, handlers, and pipeline behaviors for validation, logging, and transactions. Use this skill whenever the user wants CQRS, MediatR, command/query handlers, a request pipeline, MediatR behaviors, or asks "how do I add…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Decide whether a .NET feature/aggregate should be built as CRUD, Event Sourcing, or an event-driven design — and give the concrete implementation path. Use this skill whenever the user describes a domain, feature, aggregate, table, or entity and asks "CRUD or event sourcing?", "should this be event-sourced?", "is…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Add database resiliency to EF Core — connection retry on transient failures, command timeouts, and safe retry with transactions/execution strategy. Use this skill whenever the user wants connection resiliency, retry on failure, transient fault handling, EnableRetryOnFailure, execution strategy, or asks "how do I…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Audit EF Core DbContext and entity configuration for correctness and performance pitfalls — tracking defaults, lazy loading, missing configuration, connection setup, sensitive data logging, and pooling. Use this skill whenever the user shares a DbContext, OnModelCreating, IEntityTypeConfiguration, AddDbContext setup…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Generate Domain-Driven Design building blocks in C# — aggregates, entities, value objects, domain events, and invariant-protecting factory methods. Use this skill whenever the user wants a DDD aggregate, value object, domain event, rich domain model, bounded context structure, encapsulated invariants, or asks "how do…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Scan a .NET project's NuGet dependencies for known vulnerabilities, deprecated/outdated packages, and transitive risks, then recommend safe upgrades. Use this skill whenever the user wants to check dependencies for CVEs, vulnerable packages, outdated NuGet, transitive vulnerabilities, supply-chain risk, or asks "are…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Diagnose and fix broken distributed traces in .NET — missing spans, broken context propagation across HTTP/messaging, orphaned traces, and missing instrumentation. Use this skill whenever the user has traces that don't connect across services, missing spans, broken trace context, propagation issues over HTTP/queues…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Generate an optimized multi-stage Dockerfile and .dockerignore for a .NET app — small final image, layer caching, non-root user, and best practices. Use this skill whenever the user wants a Dockerfile, to containerize a .NET app, a multi-stage build, smaller images, chiseled/distroless images, or asks "how do I…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Analyze and optimize Entity Framework Core queries in .NET code. Use this skill whenever the user shares EF Core / LINQ-to-Entities code, a DbContext, a repository, or a slow query and wants it reviewed or sped up — or mentions N+1, lazy loading, AsNoTracking, slow EF queries, cartesian explosion, projections, or "why…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Recommend database indexes for EF Core entities based on how they're actually queried — filters, joins, ordering, and uniqueness — and generate the HasIndex configuration. Use this skill whenever the user wants index recommendations, asks why a query is slow due to a missing index, wants to add indexes…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Review EF Core migrations for destructive or risky operations before they hit production — dropped columns/tables, non-nullable adds without defaults, renames that drop data, type changes, and long-locking operations. Use this skill whenever the user has an EF Core migration, a generated Migration.cs, a pending schema…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Diagnose garbage-collection pressure in a .NET service — Large Object Heap usage, Gen2 churn, allocation rate, server vs workstation GC, and config — and recommend fixes. Use this skill whenever the user reports GC pauses, high CPU in GC, memory growth, LOH fragmentation, Gen2 collections, or asks "why is the GC…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Add ASP.NET Core health checks with a liveness/readiness split and dependency checks (database, cache, message broker) for Kubernetes and load balancers. Use this skill whenever the user wants health checks, liveness/readiness probes, /health endpoints, dependency health, Kubernetes probes, or asks "how do I add…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Guide profiling a .NET app to find the real hot paths before optimizing — which tool to use (dotnet-trace, dotnet-counters, PerfView, VS Profiler), how to capture, and how to read the results. Use this skill whenever the user wants to profile, find bottlenecks, figure out what's slow, capture a trace, read a flame…
StefanTheCode/dotnet-ai-toolkit
Skill Claude CodeCodex
Set up integration tests for an ASP.NET Core app using WebApplicationFactory and Testcontainers. Use this skill whenever the user wants integration tests, end-to-end API tests, tests that hit a real database, WebApplicationFactory setup, Testcontainers, test fixtures with a real Postgres/SQL Server/Redis, or asks "how…