F-U-S-E-E/FuseDevelopmentGroup

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Analyze code coverage and CRAP (Change Risk Anti-Patterns) scores to identify high-risk code. Use OpenCover format with ReportGenerator for Risk Hotspots showing cyclomatic complexity and untested code paths.

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Calculates CRAP (Change Risk Anti-Patterns) score for .NET methods, classes, or files. Use when the user asks to assess test quality, identify risky untested code, compute CRAP scores, or evaluate whether complex methods have sufficient test coverage. Requires code coverage data (Cobertura XML) and cyclomatic…

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Design stable, compatible public APIs using extend-only design principles. Manage API compatibility, wire compatibility, and versioning for NuGet packages and distributed systems.

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Write modern, high-performance C# code using records, pattern matching, value objects, async/await, Span /Memory , and best-practice API design patterns. Emphasizes functional-style programming with C# 12+ features.

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Choosing the right concurrency abstraction in .NET - from async/await for I/O to Channels for producer/consumer to Akka.NET for stateful entity management. Avoid locks and manual synchronization unless absolutely necessary.

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Run single-file C# programs as scripts (file-based apps) for quick experimentation, prototyping, and concept testing. Use when the user wants to write and execute a small C# program without creating a full project.

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

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

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

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.

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Scan C# source files for hard-to-test static dependencies — DateTime.Now/UtcNow, File., Directory., Environment., HttpClient, Console., Process., and other untestable statics. Produces a ranked report of static call sites by frequency. USE FOR: find untestable statics, scan for static dependencies, testability audit…

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Guide for organizing MSBuild infrastructure with Directory.Build.props, Directory.Build.targets, Directory.Packages.props, and Directory.Build.rsp. Only activate in MSBuild/.NET build context. USE FOR: structuring multi-project repos, centralizing build settings, implementing NuGet Central Package Management (CPM)…

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Make .NET projects compatible with Native AOT and trimming by systematically resolving IL trim/AOT analyzer warnings. USE FOR: making projects AOT-compatible, fixing trimming warnings, resolving IL warnings (IL2026, IL2070, IL2067, IL2072, IL3050), adding DynamicallyAccessedMembers annotations, enabling…

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

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.

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Diagnoses and fixes .NET MAUI development environment issues. Validates .NET SDK, workloads, Java JDK, Android SDK, Xcode, and Windows SDK. All version requirements discovered dynamically from NuGet WorkloadDependencies.json — never hardcoded. Use when: setting up MAUI development, build errors mentioning…

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Correctly call native (C/C++) libraries from .NET using P/Invoke and LibraryImport. Covers function signatures, string marshalling, memory lifetime, SafeHandle, and cross-platform patterns. USE FOR: writing new P/Invoke or LibraryImport declarations, reviewing or debugging existing native interop code, wrapping a C or…

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Reference data for .NET test framework detection patterns, assertion APIs, skip annotations, setup/teardown methods, and common test smell indicators across MSTest, xUnit, NUnit, and TUnit. Loaded by test analysis skills (test-anti-patterns) as framework-specific lookup tables.

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Guide developers through capturing diagnostic artifacts to diagnose production .NET performance issues. Use when the user needs help choosing diagnostic tools, collecting performance data, or understanding tool trade-offs across different environments (Windows/Linux, .NET Framework/modern .NET…

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Configure and collect crash dumps for modern .NET applications. USE FOR: enabling automatic crash dumps for CoreCLR or NativeAOT, capturing dumps from running .NET processes, setting up dump collection in Docker or Kubernetes, using dotnet-dump collect or createdump. DO NOT USE FOR: analyzing or debugging dumps…

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

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

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Guide for diagnosing and improving MSBuild project evaluation performance. Only activate in MSBuild/.NET build context. USE FOR: builds slow before any compilation starts, high evaluation time in binlog analysis, expensive glob patterns walking large directories (nodemodules, .git, bin/obj), deep import chains (>20…

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Analyzes the variety and depth of assertions across .NET test suites. Use when the user asks to evaluate assertion quality, find shallow testing, identify tests with only trivial assertions, measure assertion coverage diversity, or audit whether tests verify different facets of correctness. Produces metrics and…

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Reference data for .NET test framework detection patterns, assertion APIs, skip annotations, setup/teardown methods, and common test smell indicators across MSTest, xUnit, NUnit, and TUnit. Loaded by test analysis skills (exp-test-smell-detection, exp-assertion-quality, exp-test-maintainability, exp-test-tagging) as…

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Audits .NET test mock usage by tracing each mock setup through the production code's execution path to find dead, unreachable, redundant, or replaceable mocks. Use when the user asks to audit mock usage, find unused or unnecessary mock setups, check if mocks are needed, reduce mock duplication or over-mocking…

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Optimizes hot-path scalar loops in .NET 8+ with cross-platform Vector128/Vector256/Vector512 SIMD intrinsics, or replaces manual math loops with single TensorPrimitives API calls. Covers byte-range validation, character counting, bulk bitwise ops, cross-type conversion, fused multi-array computations, and float/double…

F-U-S-E-E/FuseDevelopmentGroup

Skill Claude Code

Performs pseudo-mutation analysis on .NET production code to find gaps in existing test suites. Use when the user asks to find weak tests, discover untested edge cases, check if tests would catch a bug, or evaluate test effectiveness through mutation-style reasoning. Analyzes production code for mutation points…