Skip to content
Developers

Core

Reliable Anthropic tool execution

0.4.3

Accept Core tool contracts with top-level JSON Schema unions and verify the authenticated Core runtime on every production release.

Fixed

  • Anthropic Agent requests now accept Core tool contracts that use a top-level JSON Schema union while Core keeps enforcing the full contract before execution.
  • Production deployment now verifies the authenticated Core Agent runtime on every release, including releases without Agent source changes.

Upgrade required

Core 0.4.3 uses App SDK 0.4.2. Bundled Apps must use their coordinated package releases declaring exact Core 0.4.3 compatibility. No configuration, migration, public SDK API, or Agent contract change is required.