chore: release main

Author: stainless-app[bot]

.release-please-manifest.json

@@ -1,5 +1,5 @@
 {
-  "src/Anthropic": "12.24.1",
+  "src/Anthropic": "12.25.0",
   "src/Anthropic.Foundry": "0.6.0",
   "src/Anthropic.Bedrock": "0.8.1",
   "src/Anthropic.Vertex": "0.4.0",

src/Anthropic/Anthropic.csproj

@@ -4,7 +4,7 @@
     <AssemblyTitle>Anthropic C#</AssemblyTitle>
     <AssemblyName>Anthropic</AssemblyName>
     <PackageId>Anthropic</PackageId>
-    <VersionPrefix>12.24.1</VersionPrefix>
+    <VersionPrefix>12.25.0</VersionPrefix>
     <StainlessMainProject>true</StainlessMainProject>
     <Description>The official .NET library for the Anthropic API.</Description>
     <OutputType>Library</OutputType>

src/Anthropic/CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## 12.25.0 (2026-06-05)
+
+Full Changelog: [Anthropic-v12.24.1...Anthropic-v12.25.0](https://github.com/anthropics/anthropic-sdk-csharp/compare/Anthropic-v12.24.1...Anthropic-v12.25.0)
+
+### Features
+
+* **client:** add first class handler support ([86994df](https://github.com/anthropics/anthropic-sdk-csharp/commit/86994df354926eed8f538877a563265440b701a7))
+
 ## 12.24.1 (2026-05-28)
 
 Full Changelog: [Anthropic-v12.24.0...Anthropic-v12.24.1](https://github.com/anthropics/anthropic-sdk-csharp/compare/Anthropic-v12.24.0...Anthropic-v12.24.1)