feat(core): Ship model steering by default.

[joshualitt]

Part of the work for #18782

[gemini-cli]

Hi @joshualitt, thank you so much for your contribution to Gemini CLI! We really appreciate the time and effort you've put into this.

We're making some updates to our contribution process to improve how we track and review changes. Please take a moment to review our recent discussion post: Improving Our Contribution Process & Introducing New Guidelines.

Key Update: Starting January 26, 2026, the Gemini CLI project will require all pull requests to be associated with an existing issue. Any pull requests not linked to an issue by that date will be automatically closed.

Thank you for your understanding and for being a part of our community!

[github-actions]

Size Change: -6 B (0%)

Total Size: 26.3 MB

Filename	Size	Change
./bundle/chunk-2JUPI7QT.js	0 B	-3.63 MB (removed)	🏆
./bundle/chunk-KZ6CX3GN.js	0 B	-13.5 MB (removed)	🏆
./bundle/core-TQ4DKVIE.js	0 B	-41.6 kB (removed)	🏆
./bundle/devtoolsService-DVLLPVOJ.js	0 B	-27.7 kB (removed)	🏆
./bundle/interactiveCli-2TKP3LZM.js	0 B	-1.61 MB (removed)	🏆
./bundle/oauth2-provider-LLLJ32ZQ.js	0 B	-9.19 kB (removed)	🏆
./bundle/chunk-344KOOYY.js	13.5 MB	+13.5 MB (new file)	🆕
./bundle/chunk-ATPVFJ33.js	3.63 MB	+3.63 MB (new file)	🆕
./bundle/core-REHCBOZR.js	41.6 kB	+41.6 kB (new file)	🆕
./bundle/devtoolsService-7UTMOJ3A.js	27.7 kB	+27.7 kB (new file)	🆕
./bundle/interactiveCli-75YVT3TI.js	1.61 MB	+1.61 MB (new file)	🆕
./bundle/oauth2-provider-JCLFB6VX.js	9.19 kB	+9.19 kB (new file)	🆕

ℹ️ View Unchanged

Filename	Size
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