.NET: Replace deprecated AWSSDK.Extensions.Bedrock.MEAI with AWS.Bedrock.MEAI

[BenGearset]

Description

AWS has deprecated the AWSSDK.Extensions.Bedrock.MEAI package. The NuGet listing is now marked deprecated with the message:

This package has been deprecated as it is legacy and is no longer maintained.

NuGet lists AWS.Bedrock.MEAI as the replacement. The extension has been renamed and moved out of aws/aws-sdk-net into the new AI Integrations on AWS for .NET repository, aws/aws-dotnet-ai, where it now releases independently.

	Old	New
Package	AWSSDK.Extensions.Bedrock.MEAI	AWS.Bedrock.MEAI
Latest version	4.0.101.8 (deprecated)	1.0.0 (stable, 2026-08-11)
Repository	aws/aws-sdk-net	aws/aws-dotnet-ai

This repo currently references the deprecated package in three places:

• dotnet/Directory.Packages.props (line 145) — <PackageVersion Include="AWSSDK.Extensions.Bedrock.MEAI" Version="4.0.101.8" />
• dotnet/samples/02-agents/AgentWithMemory/AgentWithMemory_Step03_MemoryUsingValkey_Bedrock/AgentWithMemory_Step03_MemoryUsingValkey_Bedrock.csproj — <PackageReference>
• dotnet/samples/02-agents/AgentWithMemory/AgentWithMemory_Step03_MemoryUsingValkey_Bedrock/README.md — two prose mentions

Because the package is deprecated, Dependabot will no longer surface version bumps for it (the last one was #7829), so the Bedrock sample is now pinned to an unmaintained adapter and will silently miss upstream fixes.

Migration impact

This is a drop-in swap — no source changes are required. Per the new package's README, the AmazonBedrockRuntimeExtensions methods (AsIChatClient, AsIEmbeddingGenerator, etc.) remain in the Amazon.BedrockRuntime namespace. Only the package identity and version change. The package's own types (e.g. BedrockStructuredOutputMode) now live in the AWS.Bedrock.MEAI namespace, but the sample does not reference any of those.

Target frameworks are unchanged in the relevant direction: the new package supports net472, netstandard2.0, and net8.0, and the sample targets net10.0.

I verified locally that swapping the package reference builds the sample cleanly (Build succeeded. 0 Warning(s), 0 Error(s)) with Program.cs untouched.

Steps to reproduce

1. Open dotnet/samples/02-agents/AgentWithMemory/AgentWithMemory_Step03_MemoryUsingValkey_Bedrock.
2. Restore packages.
3. Observe that AWSSDK.Extensions.Bedrock.MEAI 4.0.101.8 resolves to a package deprecated on nuget.org.

Expected behavior

The repo references the maintained AWS.Bedrock.MEAI package so the Bedrock sample keeps receiving upstream updates and Dependabot coverage.

Proposal

Rename the package reference in Directory.Packages.props to AWS.Bedrock.MEAI version 1.0.0, update the sample's PackageReference, and update the two README mentions. I'm happy to open the PR — I have the change made and building locally.