opencode 使用mcp报错 TypeError: undefined is not an object (evaluating 'output.output.toLowerCase') #13062

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1. Ctrl30

   added

   bugSomething isn't workingSomething isn't working

   on Feb 11, 2026
2. github-actions

   assigned

   rekram1-node

   on Feb 11, 2026
3. github-actions commented on Feb 11, 2026

   

   github-actionsBot

   on Feb 11, 2026 – with GitHub Actions

   Contributor

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   This issue doesn't fully meet our contributing guidelines.

   What needs to be fixed:

   • OpenCode version is required but missing
   • Operating System information is required but missing
   • Terminal information is required but missing
   • Steps to reproduce are required but missing (even if just "I ran opencode and used MCP")

   The screenshot is helpful, but without version and system information, it's difficult to reproduce the issue. Please provide these details so we can help you better.

   ---

   Additionally, this issue appears to be a duplicate:

   This exact error has already been reported in #13042 ("MCP tools crash: TypeError on value.output.output in processor.ts"), which was filed just moments earlier and already includes:

   • Root cause analysis (AI SDK v6.0.74 breaking change)
   • Technical explanation and potential solutions
   • Affected components

   Please check #13042 for more details and discussion. You can add your specific context there if needed.

   ---

   Please edit this issue to address the missing fields within 2 hours, or it will be automatically closed. If you believe this was flagged incorrectly, please let a maintainer know.
4. github-actions

   added

   needs:complianceThis means the issue will auto-close after 2 hours.This means the issue will auto-close after 2 hours.

   on Feb 11, 2026
5. github-actions commented on Feb 11, 2026

   

   github-actionsBot

   on Feb 11, 2026 – with GitHub Actions

   Contributor

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   This issue has been automatically closed because it was not updated to meet our contributing guidelines within the 2-hour window.

   Feel free to open a new issue that follows our issue templates.
6. github-actions

   closed this as not plannedon Feb 11, 2026