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← AI PulseAug 17, 2026

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Vercel AI SDK HarnessAgent Adds Structured Output Support

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

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Source · Aug 17, 2026, 6:22 PM · On Illumora · Aug 17, 2026, 6:29 PM

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Read the source →Vercel AI SDK Changelog — Release @ai-sdk/harness-deepagents@1.0.73 · vercel/ai
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Vercel AI SDK announced an update to its HarnessAgent, introducing support for structured output. This enhancement is part of patch changes released on August 17 at 18:22 UTC, affecting several AI SDK Harness packages.

The update, identified by commit 62a9c2a, specifically adds an output property to the HarnessAgent.

Key Points

  • The HarnessAgent now supports structured output.
  • This functionality is enabled through a new output property.
  • The update is part of patch changes 62a9c2a.
  • The release occurred on August 17 at 18:22 UTC.
  • Affected packages include @ai-sdk/harness-deepagents@1.0.73, @ai-sdk/harness-pi@1.0.75, @ai-sdk/harness-opencode@1.0.74, and @ai-sdk/harness-grok-build@1.0.10.
  • The core @ai-sdk/harness package was updated to version 1.0.73.

Context

According to the Vercel AI SDK changelog, the feat(harness) update introduces a specific feature to the harness component. This change is consistently noted across multiple related package releases, indicating a core update to the HarnessAgent functionality.

Why It Matters

This update provides developers using the Vercel AI SDK with a direct method for managing structured output from the HarnessAgent. This can simplify parsing and integration of agent responses into downstream applications, potentially reducing the need for custom parsing logic.

What To Do

  • Review the Vercel AI SDK documentation for the HarnessAgent to understand the new output property.
  • Test the structured output feature in your existing AI SDK Harness implementations.
  • Note the updated dependency versions for @ai-sdk/harness and related packages.
  • Compare the new structured output capabilities with previous methods of handling agent responses.