AI
Plugins and skills

As of Nov 2 Look at the repository before you install: skills instruct the assistant, hooks and MCP servers run commands on your machine. This list is not a security review.

• csharp-scripts Official

  Has the assistant build and run C# file-based apps with #:package, #:property and #:include directives, without creating a project.

  C# and language dotnet/skills ★ 5.8k in the dotnet-advanced plugin MIT
  Install for Codex / ChatGPT With the plugin

  codex plugin marketplace add dotnet/skillsCopy

  Then open /plugins in Codex and install dotnet-advanced.

  On its own

  npx skills add dotnet/skills --skill csharp-scripts -a codexCopy
• vectorization Official

  Has the assistant write SIMD loops with TensorPrimitives and Vector128, then check scalar contract equivalence, tail handling and measured speedups.

  C# and language dotnet/skills ★ 5.8k in the dotnet-advanced plugin MIT
  Install for Codex / ChatGPT With the plugin

  codex plugin marketplace add dotnet/skillsCopy

  Then open /plugins in Codex and install dotnet-advanced.

  On its own

  npx skills add dotnet/skills --skill vectorization -a codexCopy
• migrate-nullable-references Official

  Has the assistant enable nullable reference types in an existing C# project, resolve CS86xx warnings step by step, and annotate public APIs with accurate nullability.

  C# and language dotnet/skills ★ 5.8k in the dotnet-upgrade plugin includes scripts MIT
  Install for Codex / ChatGPT With the plugin

  codex plugin marketplace add dotnet/skillsCopy

  Then open /plugins in Codex and install dotnet-upgrade.

  On its own

  npx skills add dotnet/skills --skill migrate-nullable-references -a codexCopy
• process-api-net11 Official

  Has the assistant start external processes and capture their output without deadlocks, using the new .NET 11 Process APIs such as Process.RunAndCaptureText, KillOnParentExit and StartDetached.

  C# and language dotnet/skills ★ 5.8k in the dotnet11 plugin MIT
  Install for Codex / ChatGPT With the plugin

  codex plugin marketplace add dotnet/skillsCopy

  Then open /plugins in Codex and install dotnet11.

  On its own

  npx skills add dotnet/skills --skill process-api-net11 -a codexCopy
• system-text-json-net11 Official

  Has the assistant use the .NET 11 System.Text.Json PascalCase naming policy and generic GetTypeInfo and TryGetTypeInfo calls correctly, then run the sample to verify.

  C# and language dotnet/skills ★ 5.8k in the dotnet11 plugin MIT
  Install for Codex / ChatGPT With the plugin

  codex plugin marketplace add dotnet/skillsCopy

  Then open /plugins in Codex and install dotnet11.

  On its own

  npx skills add dotnet/skills --skill system-text-json-net11 -a codexCopy
• akka-net-best-practices

  Has the assistant pick between EventStream and DistributedPubSub for Akka.NET actors and apply supervision strategies and error handling correctly.

  C# and language Aaronontheweb/dotnet-skills ★ 1.2k in the dotnet-skills plugin MIT
  Install for Codex / ChatGPT With the plugin

  codex plugin marketplace add Aaronontheweb/dotnet-skillsCopy

  Then open /plugins in Codex and install dotnet-skills.

  On its own

  npx skills add Aaronontheweb/dotnet-skills --skill akka-net-best-practices -a codexCopy
• csharp-concurrency-patterns

  Has the assistant pick the right concurrency tool among async/await, Channels, Rx and Akka.NET, and avoid needless locks in .NET code.

  C# and language Aaronontheweb/dotnet-skills ★ 1.2k in the dotnet-skills plugin MIT
  Install for Codex / ChatGPT With the plugin

  codex plugin marketplace add Aaronontheweb/dotnet-skillsCopy

  Then open /plugins in Codex and install dotnet-skills.

  On its own

  npx skills add Aaronontheweb/dotnet-skills --skill csharp-concurrency-patterns -a codexCopy
• csharp-nullable-reference-types

  Has the assistant apply nullable reference types, the null-forgiving operator and CodeAnalysis nullable attributes correctly to make null contracts explicit in C# APIs.

  C# and language Aaronontheweb/dotnet-skills ★ 1.2k in the dotnet-skills plugin MIT
  Install for Codex / ChatGPT With the plugin

  codex plugin marketplace add Aaronontheweb/dotnet-skillsCopy

  Then open /plugins in Codex and install dotnet-skills.

  On its own

  npx skills add Aaronontheweb/dotnet-skills --skill csharp-nullable-reference-types -a codexCopy
• microsoft-extensions-configuration

  Has the assistant bind appsettings.json to strongly-typed Options classes and validate them at startup with IValidateOptions and Data Annotations.

  C# and language Aaronontheweb/dotnet-skills ★ 1.2k in the dotnet-skills plugin MIT
  Install for Codex / ChatGPT With the plugin

  codex plugin marketplace add Aaronontheweb/dotnet-skillsCopy

  Then open /plugins in Codex and install dotnet-skills.

  On its own

  npx skills add Aaronontheweb/dotnet-skills --skill microsoft-extensions-configuration -a codexCopy
• modern-csharp-coding-standards

  Has the assistant apply modern C# conventions to new code: records, readonly record struct value objects, pattern matching, and Span<T>/Memory<T> in hot paths.

  C# and language Aaronontheweb/dotnet-skills ★ 1.2k in the dotnet-skills plugin MIT
  Install for Codex / ChatGPT With the plugin

  codex plugin marketplace add Aaronontheweb/dotnet-skillsCopy

  Then open /plugins in Codex and install dotnet-skills.

  On its own

  npx skills add Aaronontheweb/dotnet-skills --skill modern-csharp-coding-standards -a codexCopy