[BOT ISSUE] RubyLLM embed, paint, and transcribe APIs not instrumented

Bắt đầu với lib/braintrust/contrib/ruby_llm/patcher.rb và lib/braintrust/contrib/ruby_llm/instrumentation/chat.rb để hiểu instrumentation hiện có của ChatPatcher và Chat#complete. Sau đó kiểm tra lib/braintrust/contrib/ruby_llm/integration.rb, hiện chỉ đăng ký ChatPatcher. Công việc được xem là hoàn tất khi RubyLLM.embed, RubyLLM.paint và RubyLLM.transcribe được instrument cùng với các chat API hiện có.

Summary

RubyLLM provides three AI inference APIs beyond chat completions — RubyLLM.embed, RubyLLM.paint, and RubyLLM.transcribe — none of which are instrumented by this SDK. The current RubyLLM integration only instruments Chat#complete and Chat#execute_tool.

What is missing

1. Embeddings — RubyLLM::Embedding.embed / RubyLLM.embed

Creates vector embeddings from text. Returns an Embedding object with vectors, model, and input_tokens. Supports provider/model selection and dimensions parameter. This is a core inference API used for RAG and semantic search.

2. Image generation — RubyLLM::Image.paint / RubyLLM.paint

Generates images from text prompts. Returns an Image object with url, data, mime_type, revised_prompt, model_id. Supports model/provider/size selection.

3. Audio transcription — RubyLLM::Transcription.transcribe / RubyLLM.transcribe

Converts audio files to text. Returns a Transcription object with text, model, language, duration, segments, input_tokens, output_tokens. Has built-in token tracking useful for cost attribution.

All three are stable public APIs available since RubyLLM 1.8+ (the minimum version this SDK targets). Each is a single-method call with a simple request/response pattern (no streaming), making instrumentation straightforward.

Braintrust docs status

not_found — The Braintrust RubyLLM integration docs at https://www.braintrust.dev/docs/integrations/ai-sdks/ruby-llm describe support for chat completions across multiple providers and tool/function call tracing but do not mention embeddings, image generation, or transcription.

Upstream sources

• RubyLLM GitHub: https://github.com/crmne/ruby_llm
• RubyLLM docs for embeddings: https://rubyllm.com/guides/embeddings
• RubyLLM docs for image generation: https://rubyllm.com/guides/image-generation
• RubyLLM docs for audio transcription: https://rubyllm.com/guides/audio-transcription
• RubyLLM changelog: https://github.com/crmne/ruby_llm/releases — all three features predate the 1.8 minimum version

Local repo files inspected

• lib/braintrust/contrib/ruby_llm/patcher.rb — defines only ChatPatcher, no EmbeddingPatcher, ImagePatcher, or TranscriptionPatcher
• lib/braintrust/contrib/ruby_llm/instrumentation/chat.rb — only wraps Chat#complete and Chat#execute_tool
• lib/braintrust/contrib/ruby_llm/integration.rb — registers only the ChatPatcher