Alexander Whitestone 95bb842a21 feat: Wire Gemma 4 vision into browser_tool for screenshot analysis ...

Default browser_vision screenshots to google/gemma-4-27b-it (Gemma 4
native multimodal) for reduced latency and unified text+vision model.

Resolution order for _get_vision_model():
1. BROWSER_VISION_MODEL env var (new, browser-specific override)
2. auxiliary.browser_vision.model in config.yaml (new config key)
3. AUXILIARY_VISION_MODEL env var (existing global vision override)
4. Default: google/gemma-4-27b-it

Backward compatibility: existing AUXILIARY_VISION_MODEL users are
unaffected — their override still flows through to browser_vision.

Also documents the new auxiliary.browser_vision config section in
cli-config.yaml.example and adds 14 unit tests covering the full
priority chain.

Fixes #816

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-04-21 17:14:32 -04:00

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