Make NuGet README packaging explicit per project

Author: KSemenenko

ClaudeCodeSharpSDK.Extensions.AI/ClaudeCodeSharpSDK.Extensions.AI.csproj

@@ -2,6 +2,7 @@
   <PropertyGroup>
     <Description>.NET Microsoft.Extensions.AI adapter for ClaudeCodeSharpSDK, providing IChatClient integration.</Description>
     <PackageId>ManagedCode.ClaudeCodeSharpSDK.Extensions.AI</PackageId>
+    <PackageReadmeFile>README.md</PackageReadmeFile>
     <RootNamespace>ManagedCode.ClaudeCodeSharpSDK.Extensions.AI</RootNamespace>
     <AssemblyName>ManagedCode.ClaudeCodeSharpSDK.Extensions.AI</AssemblyName>
     <PackageTags>claude;anthropic;sdk;ai;agent;cli;microsoft-extensions-ai;ichatclient</PackageTags>
@@ -10,6 +11,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <None Include="..\README.md" Pack="true" PackagePath="/" Link="README.md" Visible="false" />
     <PackageReference Include="DotNet.ReproducibleBuilds">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

ClaudeCodeSharpSDK/ClaudeCodeSharpSDK.csproj

@@ -2,6 +2,7 @@
   <PropertyGroup>
     <Description>.NET SDK for the Anthropic Claude Code CLI with streaming thread events.</Description>
     <PackageId>ManagedCode.ClaudeCodeSharpSDK</PackageId>
+    <PackageReadmeFile>README.md</PackageReadmeFile>
     <RootNamespace>ManagedCode.ClaudeCodeSharpSDK</RootNamespace>
     <AssemblyName>ManagedCode.ClaudeCodeSharpSDK</AssemblyName>
     <PackageTags>claude;anthropic;sdk;ai;agent;cli</PackageTags>
@@ -10,6 +11,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <None Include="..\README.md" Pack="true" PackagePath="/" Link="README.md" Visible="false" />
     <PackageReference Include="DotNet.ReproducibleBuilds">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

Directory.Build.props

@@ -26,16 +26,11 @@
     <RepositoryUrl>https://github.com/managedcode/ClaudeCodeSharpSDK</RepositoryUrl>
     <PackageProjectUrl>https://github.com/managedcode/ClaudeCodeSharpSDK</PackageProjectUrl>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
-    <PackageReadmeFile>README.md</PackageReadmeFile>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <EnablePackageValidation>true</EnablePackageValidation>
   </PropertyGroup>
 
-  <ItemGroup>
-    <None Include="$(MSBuildThisFileDirectory)README.md" Pack="true" PackagePath="/" Visible="false" />
-  </ItemGroup>
-
   <PropertyGroup Condition="'$(GITHUB_ACTIONS)' == 'true' or '$(CI)' == 'true' or '$(TF_BUILD)' == 'true'">
     <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
   </PropertyGroup>