Feature: Support disabled_models config to hide specific models

[arlishansenn]

Summary

Currently, opencode supports disabled_providers to disable entire providers, but there's no way to disable specific models within a provider.

Use Case

When using providers like google, many models are listed but not all are actually available:

• google/gemini-1.5-* - 404 Not Found
• google/gemini-2.0-* - 404 or unsupported
• google/*-tts*, *-image*, *-live*, *-embedding* - Not suitable for chat

Out of 26 Google models listed, only 5 are actually usable for chat:

• google/gemini-2.5-flash
• google/gemini-2.5-pro
• google/gemini-2.5-flash-lite
• google/gemini-3-flash-preview
• google/gemini-3-pro-preview

Proposed Solution

Add a disabled_models config option in opencode.json:

```json
{
"disabled_providers": ["poe"],
"disabled_models": [
"google/gemini-1.5-",
"google/gemini-2.0-",
"google/-tts",
"google/-image",
"google/-live",
"google/-embedding"
]
}
```

Features:

• Support glob patterns (e.g., google/gemini-1.5-*)
• Support exact model IDs (e.g., google/gemini-flash-latest)
• Hidden models won't appear in opencode models output
• Hidden models won't be selectable in the UI

Workaround

I've built checkmodel which maintains its own blacklist at ~/.config/checkmodel/checkmodel.json, but this only affects checkmodel's testing - the models still appear in opencode.

Benefits

1. Cleaner model list - only show models that actually work
2. Prevent user confusion when selecting unavailable models
3. Reduce API errors from attempting to use unsupported models

[github-actions]

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

• feature: filter unsupported models #1214: feature: filter unsupported models - Requests ability to filter out models blocked by employer or not supported
• /models shows all available models rather than those restricted in opencode.json. #4476: /models shows all available models rather than those restricted in opencode.json - User expects opencode.json model restrictions to filter the /models output
• GitHub Copilot provider lists unavailable models instead of org-enabled ones #7256: GitHub Copilot provider lists unavailable models instead of org-enabled ones - Models unavailable for organization should not be displayed

These issues all relate to filtering/hiding unavailable or unwanted models from the UI and command output.

Feel free to ignore if your specific use case with Google models and glob pattern support addresses a different need than these.

[kostrse]

The config structure could be per provider rather than a plain list.

And maybe similar syntax to permissions where all can be disabled except a few, or vice versa?

[KelvinJRosado]

I think it would also be beneficial to add enabled_models to mirror how we have enabled_providers and disabled_providers. That way we can whitelist specific models we want to use and/or blacklist models to avoid

[KelvinJRosado]

This would be super helpful in my work environment, where there's only certain models that we're allowed to use. Or even just for cases where users have a preference for certain models. So I went ahead and opened a PR to add this along with am enabled_models option to mirror how providers can be enabled/disabled