fix(patch): cherry-pick 37f128a to release/v0.28.0-pr-18478

[gemini-cli-robot]

This PR automatically cherry-picks commit 37f128a to patch version v0.28.0 in the stable release to create version 0.28.1.

⚠️ Merge Conflicts Detected

This cherry-pick resulted in merge conflicts that need manual resolution.

🔧 Next Steps:

1. Review the conflicts: Check out this branch and review the conflict markers
2. Resolve conflicts: Edit the affected files to resolve the conflicts
3. Test the changes: Ensure the patch works correctly after resolution
4. Update this PR: Push your conflict resolution

📋 Files with conflicts:

The commit has been created with conflict markers for easier manual resolution.

🚨 Important:

• Do not merge this PR until conflicts are resolved
• The automated patch release will trigger once this PR is merged

[gemini-code-assist]

Summary of Changes

Hello @gemini-cli-robot, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the model routing mechanism by introducing a specific check for Gemini 3 models. The core intent is to ensure that the numerical routing strategy, which dynamically selects models, is only engaged when a Gemini 3 model is in use. This change enhances the precision of model selection and prevents unintended routing behavior with other model families, thereby improving the overall stability and predictability of the routing system.

Highlights

• Gemini 3 Model Identification: A new utility function, isGemini3Model, has been introduced to accurately identify Gemini 3 models based on their naming conventions.
• Numerical Routing Restriction: The numerical routing strategy has been updated to exclusively apply to Gemini 3 models, preventing its use with older Gemini versions.
• Updated Routing Strategies: Both ClassifierStrategy and NumericalClassifierStrategy have been modified to incorporate the isGemini3Model check, ensuring routing decisions align with the new restriction.
• Test Coverage: Comprehensive tests have been added and updated across relevant files to validate the correct behavior of the new isGemini3Model function and the revised routing logic for Gemini 3 and non-Gemini 3 models.

Changelog

• packages/core/src/config/models.test.ts
  • Added tests for the new isGemini3Model function.
• packages/core/src/config/models.ts
  • Implemented the isGemini3Model utility function.
• packages/core/src/routing/strategies/classifierStrategy.test.ts
  • Updated test cases to reflect the restriction of numerical routing to Gemini 3 models.
• packages/core/src/routing/strategies/classifierStrategy.ts
  • Modified the ClassifierStrategy to check if the model is Gemini 3 before applying numerical routing.
• packages/core/src/routing/strategies/numericalClassifierStrategy.test.ts
  • Adjusted tests to verify that NumericalClassifierStrategy only applies to Gemini 3 models and updated expected routed models to preview versions.
• packages/core/src/routing/strategies/numericalClassifierStrategy.ts
  • Updated the NumericalClassifierStrategy to explicitly check if the model is Gemini 3.

Activity

• This pull request was automatically generated to cherry-pick commit 37f128a1099cd7097ddab45509a847e046cc4102 to the release/v0.28.0-pr-18478 branch.
• Merge conflicts were detected during the automated cherry-pick process.
• Manual resolution of the identified merge conflicts is required before this PR can be merged.

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[gemini-code-assist]

Code Review

This pull request cherry-picks a feature to restrict numerical routing to Gemini 3 models. The changes look mostly correct, but there are several critical issues. Multiple files contain unresolved merge conflict markers which will break the build. I've provided suggestions to resolve them. Additionally, I've found a logic bug in the new isGemini3Model function and its usage, which doesn't correctly handle model aliases with preview features enabled. I've included suggestions to fix this bug and the related tests.

[github-actions]

Size Change: +465 B (0%)

Total Size: 23.7 MB

ℹ️ View Unchanged

Filename	Size	Change
./bundle/gemini.js	23.7 MB	+465 B (0%)
./bundle/sandbox-macos-permissive-closed.sb	1.03 kB	0 B
./bundle/sandbox-macos-permissive-open.sb	890 B	0 B
./bundle/sandbox-macos-permissive-proxied.sb	1.31 kB	0 B
./bundle/sandbox-macos-restrictive-closed.sb	3.29 kB	0 B
./bundle/sandbox-macos-restrictive-open.sb	3.36 kB	0 B
./bundle/sandbox-macos-restrictive-proxied.sb	3.56 kB	0 B

_{compressed-size-action}

[mattKorwel]

Tested locally and approved.