The initial Gemini backend defaulted to 2.5 Flash, but large semantic extraction chunks can benefit from newer models and more output headroom. Move the default to Gemini 3 Flash Preview, add CLI and environment model overrides, and increase the Gemini completion budget while keeping low reasoning effort for cost control.
Constraint: Google exposes Gemini through an OpenAI-compatible chat-completions endpoint
Rejected: Hardcode Gemini 3.1 Pro as the default | higher cost for routine repository indexing
Confidence: medium
Scope-risk: narrow
Directive: Keep --model and GRAPHIFY_GEMINI_MODEL working before changing Gemini defaults again
Tested: uv run --directory vendor/graphify pytest tests/test_llm_backends.py tests/test_chunking.py -q
Not-tested: Live Gemini 3 extraction on the full cloud-edge repo before this commit
Daniel Graham
cc63a1711b