release: 0.43.0

Author: stainless-app[bot]

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "0.42.0"
+  ".": "0.43.0"
 }

CHANGELOG.md

@@ -1,5 +1,26 @@
 # Changelog
 
+## 0.43.0 (2026-08-17)
+
+Full Changelog: [v0.42.0...v0.43.0](https://github.com/anthropics/anthropic-sdk-php/compare/v0.42.0...v0.43.0)
+
+### Features
+
+* **api:** additions to files and memory stores ([c84d91b](https://github.com/anthropics/anthropic-sdk-php/commit/c84d91b9856de3afdec3d14fc4496c6544ff2e98))
+
+
+### Bug Fixes
+
+* **api:** remove unsupported mid_conv_system content block ([d0940d2](https://github.com/anthropics/anthropic-sdk-php/commit/d0940d24b94c87c9bd76b3b98ac623fc176880c9))
+* **client:** do not send schema defaults for omitted optional params ([070d76b](https://github.com/anthropics/anthropic-sdk-php/commit/070d76bb507e6da7606141691aeafa1a48c0fdfd))
+* **tool-runner:** forward the server-assigned container on follow-up requests ([#160](https://github.com/anthropics/anthropic-sdk-php/issues/160)) ([0a9497c](https://github.com/anthropics/anthropic-sdk-php/commit/0a9497c97accfd759dd108e419ac08b5861dc2b9))
+* **tool-runner:** stop on refusal instead of executing tools ([#144](https://github.com/anthropics/anthropic-sdk-php/issues/144)) ([70040a2](https://github.com/anthropics/anthropic-sdk-php/commit/70040a2a2bad16102fb9e369ba4efdd1bb532018))
+
+
+### Chores
+
+* **deps:** bump mcp/sdk dev dependency ([f436e41](https://github.com/anthropics/anthropic-sdk-php/commit/f436e41041e1eedf50d48f837b145de577aa1925))
+
 ## 0.42.0 (2026-08-13)
 
 Full Changelog: [v0.41.0...v0.42.0](https://github.com/anthropics/anthropic-sdk-php/compare/v0.41.0...v0.42.0)

README.md

@@ -13,7 +13,7 @@ Full documentation is available at **[platform.claude.com/docs/en/api/sdks/php](
 <!-- x-release-please-start-version -->
 
 ```sh
-composer require "anthropic-ai/sdk:^0.42.0"
+composer require "anthropic-ai/sdk:^0.43.0"
 ```
 
 <!-- x-release-please-end -->

src/Version.php

@@ -5,5 +5,5 @@
 namespace Anthropic;
 
 // x-release-please-start-version
-const VERSION = '0.42.0';
+const VERSION = '0.43.0';
 // x-release-please-end