Bug Description

It is unclear how to configure a high-thinking (large thinking budget) antigravity model as the default in oh-my-opencode.json.

Attempting to enable high thinking by appending variant suffixes (such as -high, -max, or -medium) to the model name results in invalid model errors, but the documentation does not clearly explain how a high-thinking variant is intended to be selected by default.

Steps to Reproduce

1. Define an agent in oh-my-opencode.json using an antigravity thinking model.
2. Attempt to enable high thinking by appending a suffix such as -high or -max to the model name.
3. Start opencode.

Expected Behavior

There should be a documented and supported way to configure a high-thinking (e.g., maximum thinking budget) variant as the default for an agent, or the documentation should clearly state that this is not supported.

Actual Behavior

• Model names with suffixes like -high or -max result in "invalid model" errors.
• The documentation does not clearly explain:
  • How thinking variants defined in opencode.json are intended to be selected
  • Whether a default thinking variant can be configured in oh-my-opencode.json

Environment

• opencode version: 1.1.3
• Plugin version: opencode-antigravity-auth@beta
• Operating System: Linux (WSL2) 6.6.87.2-microsoft-standard-WSL2
• Node.js version: v22.13.1

Logs

Not applicable.
(No runtime error logs are generated beyond the invalid model error.)

Debug logging can be enabled with:
export OPENCODE_ANTIGRAVITY_DEBUG=1
Logs will be written to the default antigravity log directory if applicable.

Compliance Checklist

Please confirm:

• I'm using this plugin for personal development only
• I have an active Google Cloud project with Antigravity enabled
• This issue is not related to attempting commercial use or TOS violations
• I've reviewed the README troubleshooting section

Additional Context

Valid vs Invalid Model Usage

Question for Maintainers

Given that thinking variants are defined internally in opencode.json, how is a user expected to configure high thinking as the default behavior for an agent in oh-my-opencode.json?