Add exp setting to force low reasoning effort on Gemini 3 models#319489
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Pull request overview
Adds an experiment-gated setting that forces reasoning_effort: 'low' on Gemini 3 models when sending CAPI requests.
Changes:
- New
EnableGemini3LowReasoningEffortexperiment-based config (default off). customizeCapiBodysetsbody.reasoning_effort = 'low'forgemini-3family when the experiment is enabled.- Adds package.json contribution and NLS string for the new setting.
Show a summary per file
| File | Description |
|---|---|
| extensions/copilot/src/platform/endpoint/node/chatEndpoint.ts | Applies low reasoning effort when experiment enabled for Gemini 3. |
| extensions/copilot/src/platform/configuration/common/configurationService.ts | Defines new experiment-based ConfigKey. |
| extensions/copilot/package.json | Registers the new experimental setting. |
| extensions/copilot/package.nls.json | Adds localized description for the new setting. |
Copilot's findings
- Files reviewed: 4/4 changed files
- Comments generated: 0
DonJayamanne
approved these changes
Jun 2, 2026
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Add exp setting to force low reasoning effort on Gemini 3 models