[BUG] Schema.ref 'QuestionInfo' was set alongside unsupported fields in v1.1.x

[boyan250422-code]

Description

Body:

Description

When using opencode v1.1.12 or v1.1.13, running any command with a custom provider configuration fails with a schema validation error related to QuestionInfo.

Reproduction Steps

1. Install opencode v1.1.13
2. Configure any custom provider in opencode.json
3. Run opencode run "hello"
4. Error occurs immediately

Error Message

Error: Schema.ref 'QuestionInfo' was set alongside unsupported fields.
If a schema node has Schema.ref set, then only description and default
can be set alongside it; other fields they would be replaced by the
expanded reference.

Environment

• OS: Windows 11
• opencode version: v1.1.13 (also affects v1.1.12)
• oh-my-opencode version: v2.14.0

Root Cause

In opencode v1.1.x, the JSON schema definition has issues. The QuestionInfo schema node sets $ref along with other unsupported fields simultaneously, causing schema validation to fail.

Workaround

Downgrade to v1.0.150:

# Download v1.0.150 binary
curl -sL -o opencode.zip "https://github.com/anomalyco/opencode/releases/download/v1.0.150/opencode-windows-x64.zip"
unzip opencode.zip -d ~/.local/bin/

Expected Behavior

The custom provider should initialize correctly without schema validation errors in v1.1.x.

Additional Notes

This bug makes v1.1.x versions completely unusable for anyone using custom providers. Users need to downgrade to v1.0.150 as a workaround.

Plugins

No response

OpenCode version

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Steps to reproduce

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Screenshot and/or share link

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Operating System

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Terminal

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