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← AI PulseAug 17, 2026

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Vercel AI SDK HarnessAgent Adds Structured Output Support

Vercel's AI SDK has updated its HarnessAgent to include support for structured output via an 'output' property, as detailed in recent patch changes.

By Illumora Editorial

Source · Aug 17, 2026, 6:22 PM · On Illumora · Aug 17, 2026, 6:28 PM

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Read the source →Vercel AI SDK Changelog — Release @ai-sdk/harness-opencode@1.0.74 · vercel/ai
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Vercel's AI SDK has introduced a new feature for its HarnessAgent, enabling support for structured output. This update, released on August 17 at 18:22 UTC, is part of patch changes for @ai-sdk/harness-opencode@1.0.74 and @ai-sdk/harness-pi@1.0.75.

The enhancement allows developers to specify an output property when using the HarnessAgent, facilitating the generation of structured data. This change is identified by commit 62a9c2a.

Key Points

  • The HarnessAgent in Vercel's AI SDK now supports structured output.
  • This functionality is enabled through an output property.
  • The update was released on August 17 at 18:22 UTC.
  • It applies to @ai-sdk/harness-opencode@1.0.74 and @ai-sdk/harness-pi@1.0.75.
  • The change is associated with commit 62a9c2a.
  • Dependencies for @ai-sdk/harness@1.0.73 were updated in conjunction with this release.

Context

According to the Vercel AI SDK Changelog, the feat(harness) update specifically adds support for structured output to the HarnessAgent. This modification is part of broader patch changes that also included dependency updates for @ai-sdk/harness@1.0.73.

Why It Matters

This update provides builders with a direct mechanism to ensure that the output from HarnessAgent adheres to a predefined structure, which can simplify downstream processing and integration of AI model responses.

What To Do

  • Review the changelog for @ai-sdk/harness-opencode@1.0.74 and @ai-sdk/harness-pi@1.0.75.
  • Test the new output property with HarnessAgent in development environments.
  • Note the updated dependencies for @ai-sdk/harness@1.0.73.