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dotnet-solution-setup

Repository and solution-level scaffolding best practices for .NET: .slnx solution format, Directory.Build.props shared MSBuild properties, Directory.Packages.props central package management (CPM), .editorconfig, SourceLink, deterministic/reproducible builds, global.json SDK pinning. USE FOR: scaffolding a new .NET repo or solution; choosing .sln vs .slnx; sharing MSBuild properties (TargetFramework, LangVersion, Nullable, ImplicitUsings, TreatWarningsAsErrors, EnforceCodeStyleInBuild, EnableNETAnalyzers, Deterministic) across every project; configuring SourceLink for debuggable NuGet packages; central package version management and GlobalPackageReference; pinning the SDK with global.json; .editorconfig code-style rules; CI-only ContinuousIntegrationBuild flag; reproducible/deterministic builds and packages; repo root file checklist. DO NOT USE FOR: C# language feature choices (use csharp-best-practices); benchmarking (use dotnet-benchmarking); generic math (use dotnet-generic-math).

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NetFabric/NetFabric.Numerics36 stars(GitHub 36 + cccskills 0)

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See how to install

Files included (4)

SKILL.md4.9 KB
references/central-package-management.md3.4 KB
references/directory-build-props.md4.4 KB
references/repo-scaffold.md2.9 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

.NET Solution & Project Setup

Targets .NET 9 SDK (9.0.200+) and later, where noted.

Solution File

Use .slnx (XML solution format), not .sln. Default for dotnet new sln since .NET 10 SDK; available since 9.0.200.
Migrate an existing solution: dotnet sln migrate (creates .slnx, keeps .sln untouched).
Create new: dotnet new sln (or --format sln to opt back out).

Repository Root Checklist

File	Purpose
`<Name>.slnx`	solution definition
`.editorconfig`	code style + analyzer severities, enforced at build via `EnforceCodeStyleInBuild`
`Directory.Build.props`	MSBuild properties shared by every project
`Directory.Packages.props`	central package management (CPM) — package versions in one place
`global.json`	pin SDK version (`rollForward: latestMinor`)
`.gitattributes`	enforce line endings (`* text=auto eol=lf`) for deterministic diffs
`NuGet.config`	package sources; add source mapping to silence `NU1507` when using CPM with >1 source
`.config/dotnet-tools.json`	local tool manifest (`dotnet tool restore`)

Directory.Build.props — Required Properties

Property	Value	Why
`TargetFramework`	e.g. `net10.0`	single source of truth for the whole repo
`LangVersion`	`latest`	newest C# features as soon as the SDK supports them
`Nullable`	`enable`	nullable reference type analysis
`ImplicitUsings`	`enable`	drop boilerplate `using` directives
`TreatWarningsAsErrors`	`true`	fail the build instead of accumulating warnings
`EnforceCodeStyleInBuild`	`true`	`.editorconfig` IDE0xxx style rules run on `dotnet build`, not just in the IDE
`Deterministic`	`true`	byte-identical assemblies for identical inputs (default `true` already, set explicitly)
`EnableNETAnalyzers`	`true`	run the built-in `CAxxxx` code-quality analyzers

Full example + extra hardening properties (AnalysisLevel, AnalysisMode, test-project overrides, versioning) → references/directory-build-props.md.

SourceLink

Every packable/publishable project needs SourceLink so consumers can step into source while debugging:

<PropertyGroup>
  <PublishRepositoryUrl>true</PublishRepositoryUrl>
  <EmbedUntrackedSources>true</EmbedUntrackedSources>
  <DebugType>portable</DebugType>
  <ContinuousIntegrationBuild Condition="'$(CI)' == 'true'">true</ContinuousIntegrationBuild>
</PropertyGroup>
<ItemGroup>
  <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
</ItemGroup>

ContinuousIntegrationBuild must only be true on CI (it maps local paths to repo-relative paths); leaving it true locally breaks the "Just My Code" experience. Details, symbol packages, alternate providers → references/directory-build-props.md.

Central Package Management

Directory.Packages.props sets ManagePackageVersionsCentrally=true and declares <PackageVersion> items; every project's <PackageReference> then omits Version. Full setup, GlobalPackageReference, transitive pinning, override rules → references/central-package-management.md.

Reference Files

File	Load When
references/directory-build-props.md	Writing the full `Directory.Build.props`, SourceLink details, analyzer levels, test-project overrides, git-based versioning
references/central-package-management.md	Writing `Directory.Packages.props`, `GlobalPackageReference`, transitive pinning, package source mapping
references/repo-scaffold.md	`.slnx` migration, `.editorconfig`, `global.json`, `.gitattributes`, local tool manifest, CI formatting checks

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Install

Install with a command

npx skills add https://github.com/NetFabric/NetFabric.Numerics --skill dotnet-solution-setup

Paste it into your terminal and run it (requires Node.js). You can choose which agents to install it for, such as Claude Code or Codex.

Ask your agent

Please install the following Agent Skill.
https://github.com/NetFabric/NetFabric.Numerics/tree/main/.agents/skills/dotnet-solution-setup

First review SKILL.md and the bundled files and confirm there is nothing suspicious (such as sending data externally or reading credentials). Then place it in ~/.claude/skills/dotnet-solution-setup/ for Claude Code, or ~/.agents/skills/dotnet-solution-setup/ for Codex.

Send this text to Claude Code or Codex as is. It checks the contents before installing.

View source on GitHub

Repository: NetFabric/NetFabric.Numerics
Stars: 36
Forks: 1
Category: Development
License: MIT
Original language: English
Last updated: Aug 10, 2026

A skill is a set of instructions and scripts for an agent. cccskills does not guarantee that skills are safe. Review the contents before you install.