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Migrate from Anthropic.SDK to official Anthropic package#1083

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stephentoub merged 3 commits intomainfrom
copilot/update-anthropic-sdk-samples
Dec 10, 2025
Merged

Migrate from Anthropic.SDK to official Anthropic package#1083
stephentoub merged 3 commits intomainfrom
copilot/update-anthropic-sdk-samples

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Copilot AI commented Dec 9, 2025 •
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Replaces the community-maintained Anthropic.SDK package with the official Anthropic package (v11.0.0), now maintained by Anthropic in collaboration with Microsoft.

Changes

  • Directory.Packages.props: Anthropic.SDK 5.8.0 → Anthropic 11.0.0
  • QuickstartClient: Updated to new API surface
  • ChatWithTools: Package reference only (no code changes)

API Migration

The official SDK uses IChatClient integration instead of direct Messages API:

// Before (Anthropic.SDK)
using var client = new AnthropicClient(new APIAuthentication(apiKey))
    .Messages
    .AsBuilder()
    .UseFunctionInvocation()
    .Build();

// After (official Anthropic)
using var client = new AnthropicClient(new() { APIKey = apiKey })
    .AsIChatClient("claude-haiku-4-5-20251001")
    .AsBuilder()
    .UseFunctionInvocation()
    .Build();

The new SDK provides better integration with Microsoft.Extensions.AI patterns and is the recommended package for production use.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

  • http://crl3.digicert.com:443/DigiCertHighAssuranceEVRootCA.crl
    • Triggering command: /usr/share/dotnet/dotnet dotnet build --configuration Release (http block)
  • http://crl3.digicert.com:443/NETFoundationProjectsCodeSigningCA.crl
    • Triggering command: /usr/share/dotnet/dotnet dotnet build --configuration Release (http block)
  • http://crl3.digicert.com:443/sha2-assured-ts.crl
    • Triggering command: /usr/share/dotnet/dotnet dotnet build --configuration Release (http block)

If you need me to access, download, or install something from one of these locations, you can either:

Original prompt

The repo currently uses the Anthropic.SDK for one or more samples. Please update it to instead use the official Anthropic package

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

@stephentoub
Update from Anthropic.SDK to official Anthropic package
30ad2b7 
Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>
Copilot AI changed the title [WIP] Update samples to use official Anthropic package Migrate from Anthropic.SDK to official Anthropic package Dec 9, 2025
Copilot AI requested a review from stephentoub December 9, 2025 23:29
@stephentoub stephentoub marked this pull request as ready for review December 9, 2025 23:32
@stephentoub stephentoub requested a review from halter73 December 9, 2025 23:32
@stephentoub stephentoub enabled auto-merge (squash) December 9, 2025 23:32
PederHP
PederHP reviewed Dec 10, 2025
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@PederHP
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PederHP commented Dec 10, 2025

Verified that I can run the sample after the migration.

@stephentoub @PederHP
Update samples/ChatWithTools/ChatWithTools.csproj
357d2a1 
Co-authored-by: Peder Holdgaard Pedersen <127606677+PederHP@users.noreply.github.com>
eiriktsarpalis
eiriktsarpalis reviewed Dec 10, 2025
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@stephentoub stephentoub merged commit f9239b0 into main Dec 10, 2025
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@stephentoub stephentoub deleted the copilot/update-anthropic-sdk-samples branch December 10, 2025 13:58
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@stephentoub stephentoub stephentoub approved these changes

@eiriktsarpalis eiriktsarpalis eiriktsarpalis approved these changes

@halter73 halter73 Awaiting requested review from halter73

+1 more reviewer

@PederHP PederHP PederHP approved these changes

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