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The provider error is caused by tool schema incompatibility, not by prompt failure. #24158

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The provider error is caused by tool schema incompatibility, not by prompt failure.#24158
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rekram1-node
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bugSomething isn't workingcoreAnything pertaining to core functionality of the application (opencode server stuff)windows

Description

@fernandolemos92
fernandolemos92
opened on Apr 24, 2026

Description

Relevant error:
Invalid request: tools.function.parameters is not a valid moonshot flavored json schema, details: <At path 'properties.variantOptions': conflicting keywords found after $ref expansion: description>

Diagnosis:
OpenCode is sending a function/tool JSON schema that Moonshot AI rejects with HTTP 400.
This appears to be a provider compatibility issue involving tool/function parameters schema, specifically around properties.variantOptions and description after $ref expansion.

Plugins

No response

OpenCode version

1.14.22

Steps to reproduce

  1. /connect
  2. insert my API from opencode
  3. /models
  4. pick Kimi k2.5 from GO package
  5. try any prompt -> receive a Error from provider: Provider returned error

Screenshot and/or share link

Image

Operating System

Windows 11

Terminal

VSCODE Terminal

Activity

  1. fernandolemos92
    added
    bugSomething isn't working
    on Apr 24, 2026
  2. github-actions
    assigned
    rekram1-node
    on Apr 24, 2026
  3. github-actions
    added
    coreAnything pertaining to core functionality of the application (opencode server stuff)
    windows
    on Apr 24, 2026

  4. github-actions commented on Apr 24, 2026

    @github-actions
    github-actionsBot
    on Apr 24, 2026 – with GitHub Actions
    Contributor

    This issue might be a duplicate of existing issues. Please check:

    These issues describe the same or closely related Kimi/Moonshot provider errors during tool calling. Please review them and comment there if your issue is the same, or clarify what is different about your report.

  5. rekram1-node commented on Apr 28, 2026

    @rekram1-node
    rekram1-node
    on Apr 28, 2026
    Collaborator

    I merged a fix may not fix it 100% yet but let's discuss further if you are still getting this error on latest

  6. rekram1-node
    closed this as a duplicateof [Bug]: OpenCode Go + Kimi K2.6/K2.5 returns 'Provider returned error' on CLI 1.14.20 #23887 on Apr 28, 2026
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