[bot] ruby-anthropic gem (alexrudall) not instrumented

[braintrust-bot]

Summary

The ruby-anthropic gem (~444K downloads, v0.4.2, April 2025) by alexrudall is not instrumented by this SDK. This is a direct asymmetry: the SDK instruments both the official OpenAI gem (openai) and alexrudall's community OpenAI gem (ruby-openai), but for Anthropic it only instruments the official gem (anthropic) — not the equivalent community gem (ruby-anthropic) by the same author.

What is missing

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

Messages API (Chat Completions)

• client.messages(parameters: { model:, messages:, ... }) — Core chat completions method supporting Claude models (claude-3-haiku, claude-3-sonnet, claude-3-opus, claude-3.5-sonnet, etc.)

Streaming

• client.messages(parameters: { ..., stream: Proc.new { |chunk| } }) — Streaming responses via callback proc

Batches API

• client.messages.batches.create(parameters: { ... }) — Asynchronous batch processing of multiple message requests

Vision

• Multimodal image analysis via base64-encoded image content in messages

Braintrust docs status

not_found — Braintrust docs at https://www.braintrust.dev/docs/instrument/trace-llm-calls list only the official anthropic gem (minimum version 0.3.0) for Ruby Anthropic tracing. No mention of ruby-anthropic anywhere.

Upstream sources

• GitHub: https://github.com/alexrudall/ruby-anthropic
• RubyGems: https://rubygems.org/gems/ruby-anthropic (~444K downloads, v0.4.2, April 2025)
• Author: alexrudall (same author as ruby-openai, which IS instrumented by this SDK)

Local repo files inspected

• lib/braintrust/contrib.rb (lines 196–205) — registers 4 integrations: OpenAI, RubyOpenAI, RubyLLM, Anthropic. No RubyAnthropic integration.
• lib/braintrust/contrib/ — contains openai/, ruby_openai/, ruby_llm/, anthropic/ directories. No ruby_anthropic/ directory.
• lib/braintrust/contrib/ruby_openai/integration.rb — instruments alexrudall's ruby-openai gem, confirming the pattern of instrumenting community gems alongside official ones.
• lib/braintrust/contrib/anthropic/integration.rb — only instruments the official anthropic gem (checks for ::Anthropic::Client).
• Appraisals — no appraisal scenarios for ruby-anthropic
• braintrust.gemspec — no mention of ruby-anthropic
• Grep for ruby.anthropic and ruby_anthropic across lib/braintrust/ returns zero matches

Notes

The existing ruby_openai integration demonstrates the pattern for instrumenting alexrudall's community gems. A ruby_anthropic integration could follow the same structure: RubyAnthropic::Integration, RubyAnthropic::MessagesPatcher, etc., mirroring how RubyOpenAI::ChatPatcher parallels OpenAI::ChatPatcher.