Imperative guidance for the System.Text.Json APIs added in .NET 11: the built-in `JsonNamingPolicy.PascalCase` naming policy, and the strongly-typed generic `JsonSerializerOptions.GetTypeInfo` and `JsonSerializerOptions.TryGetTypeInfo` metadata accessors (generic overloads that return a typed `JsonTypeInfo`).
Install
npx skills add dotnet/skills --skill system-text-json-net11npx skills add dotnet/skills --skill system-text-json-net11 -a claude-code -gnpx skills add dotnet/skills --skill system-text-json-net11 -a codex -ggemini skills install https://github.com/dotnet/skills.git --path plugins/dotnet11/skills/system-text-json-net11gh skill install dotnet/skills system-text-json-net11git clone --depth 1 https://github.com/dotnet/skills /tmp/dotnet__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/dotnet__skills/plugins/dotnet11/skills/system-text-json-net11 ~/.claude/skills/system-text-json-net11 # Claude Code
cp -R /tmp/dotnet__skills/plugins/dotnet11/skills/system-text-json-net11 ~/.agents/skills/system-text-json-net11 # Codex, Cursor, Gemini CLI, Copilot, OpenCode