fix(harness): avoid incorrectly marked invalid tool calls due to dynamic flag being dropped

[felixarntz]

Background

Provider-executed dynamic tool calls can be absent from the merged tool set. The harness dropped their dynamic flag before validation, causing otherwise valid calls to be marked invalid.

Summary

• Preserve the optional dynamic flag when converting harness tool-call events for validation.
• Add regression coverage for undeclared provider-executed dynamic tools.

Checklist

• All commits are signed (PRs with unsigned commits cannot be merged)
• Tests have been added / updated (for bug fixes / features)
• Documentation has been added / updated (for bug fixes / features)
• A patch changeset for relevant packages has been added (for bug fixes / features - run pnpm changeset in the project root)
• I have reviewed this pull request (self-review)

[github-actions]

🚀 Published in:

Package	Version
ai	7.0.36 github npm
@ai-sdk/amazon-bedrock	5.0.29 github npm
@ai-sdk/angular	3.0.36 github npm
@ai-sdk/azure	4.0.20 github npm
@ai-sdk/google	4.0.23 github npm
@ai-sdk/google-vertex	5.0.27 github npm
@ai-sdk/harness	1.0.41 github npm
@ai-sdk/harness-claude-code	1.0.42 github npm
@ai-sdk/harness-codex	1.0.43 github npm
@ai-sdk/harness-deepagents	1.0.40 github npm
@ai-sdk/harness-opencode	1.0.42 github npm
@ai-sdk/harness-pi	1.0.41 github npm
@ai-sdk/langchain	3.0.36 github npm
@ai-sdk/llamaindex	3.0.36 github npm
@ai-sdk/openai	4.0.19 github npm
@ai-sdk/otel	1.0.36 github npm
@ai-sdk/policy-opa	1.0.36 github npm
@ai-sdk/react	4.0.39 github npm
@ai-sdk/rsc	3.0.36 github npm
@ai-sdk/sandbox-just-bash	1.0.41 github npm
@ai-sdk/sandbox-vercel	1.0.41 github npm
@ai-sdk/svelte	5.0.36 github npm
@ai-sdk/tui	1.0.37 github npm
@ai-sdk/vue	4.0.36 github npm
@ai-sdk/workflow	1.0.36 github npm
@ai-sdk/workflow-harness	1.0.41 github npm