Roo does not correctly detect context length for LM Studio models

[Angular-Angel]

App Version

3.21.5

API Provider

LM Studio

Model Used

Devstral, Qwen3-30B-A3B

🔁 Steps to Reproduce

Load Roo, use an LM Studio model, and begin a conversation. The context length will show up as '1', instead of the actual value entered in LM Studio.

💥 Outcome Summary

When using LM Studio models, context length will show up as '1', instead of the actual value entered in LM Studio.

📄 Relevant Logs or Errors (Optional)

SCOPE: Setting in the api profile for manually entering context length.

[Angular-Angel]

A picture:

[Angular-Angel]

The issue may be: src/api/providers/lm-studio.ts at line 133, where it goes:

    override getModel(): { id: string; info: ModelInfo } {
        return {
            id: this.options.lmStudioModelId || "",
            info: openAiModelInfoSaneDefaults,
        }
    }

and returns based on openAiModelInfoSaneDefaults instead of the actual model information?

[dosubot]

Hi @Angular-Angel! I'm Dosu and I’m helping the Roo-Code team.

Yes, returning openAiModelInfoSaneDefaults in getModel() is likely the reason Roo is showing an incorrect context length for LM Studio models. The update notes for v3.21.5 state that context length detection for LM Studio should be automatic and accurate, so relying on static defaults here doesn't match the intended behavior and could cause the issue you’re seeing. There’s no documentation showing that openAiModelInfoSaneDefaults contains the correct context length for LM Studio models, and the docs don’t clarify how Roo is supposed to fetch this info from LM Studio itself. This suggests either the code isn’t using the new detection logic, or the detection is failing and falling back to defaults.

If you want to verify or fix this, check if there’s logic elsewhere in the codebase that fetches or overrides model info (especially context length) for LM Studio, and make sure getModel() is returning the actual detected values, not just the defaults.
Reference: v3.21.5 update notes

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[Angular-Angel]

I just tried the fix, I'm afraid it doesn't work for me, at least not with Devstral.