[BOT ISSUE] gemini-ai gem not instrumented

[braintrust-bot]

Summary

The gemini-ai gem (~360K downloads, v4.3.0, July 2025) is the most established standalone Google Gemini Ruby client and is not instrumented by this SDK. The SDK instruments standalone clients for OpenAI (openai, ruby-openai) and Anthropic (anthropic), but has no standalone Google Gemini client instrumentation.

What is missing

No instrumentation exists for any gemini-ai execution surface. Key APIs that should be instrumented:

Chat / Content Generation

• client.generate_content(params) — non-streaming content generation (text, multimodal)
• client.stream_generate_content(params) — streaming content generation with chunk callbacks

Embeddings

• client.embed_content(params) — vector embeddings generation

Tool / Function Calling

• Function declarations and automatic function calling during content generation

Structured Outputs

• JSON format mode for structured generation via response schema

Provider Support

• Google AI Studio (API key auth)
• Google Vertex AI (service account and application default credentials)

Braintrust docs status

not_found — No mention of gemini-ai anywhere in Braintrust documentation at https://www.braintrust.dev/docs. The SDK integrations page does not list any standalone Google Gemini Ruby client.

Upstream sources

• GitHub: https://github.com/gbaptista/gemini-ai
• RubyGems: https://rubygems.org/gems/gemini-ai (~360K downloads, v4.3.0, July 2025)
• Google Gemini API docs: https://ai.google.dev/docs

Local repo files inspected

• lib/braintrust/contrib/*/integration.rb — only 4 integrations registered: OpenAI, RubyOpenAI, RubyLLM, Anthropic. No Gemini integration.
• lib/braintrust/contrib/ — no directory or files for gemini or google
• Appraisals — no appraisal scenarios for gemini-ai
• braintrust.gemspec — no mention of gemini
• Grep for gemini across lib/braintrust/ returns zero matches