[v5.0] fix(anthropic): warn when jsonTool disables parallel tool use

[lgrammel]

Background

The Anthropic provider ignores the disableParallelToolUse: false setting when structuredOutputMode: 'jsonTool' is set.

providerOptions: {
  anthropic: {
    structuredOutputMode: 'jsonTool',
    disableParallelToolUse: false,
  },
}

Summary

Add an unsupported-option warning when parallel tool use is explicitly requested with the Anthropic JSON response tool, cover the behavior with a regression test, and add a patch changeset for @ai-sdk/anthropic.

Testing

Passed the complete Anthropic provider test suite in Node and Edge environments (446 tests each), pnpm check, pnpm type-check:full, the Anthropic package build, and git diff --check.

Related Issues

Fixes #15652

Backport of #17560

[github-actions]

🚀 Published in:

Package	Version
@ai-sdk/amazon-bedrock	3.0.108 github npm
@ai-sdk/anthropic	2.0.88 github npm
@ai-sdk/anthropic-aws	0.1.3 github npm
@ai-sdk/google-vertex	3.0.154 github npm