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[bot] RubyLLM moderation API (`RubyLLM.moderate`) not instrumented

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难度
3/5
预计耗时
1-2 天
新手友好度
72/100
Issue 类型
功能
描述清晰度
描述清楚
活跃度
冷清
技术栈
ruby
领域
observability

调研方向

从 lib/braintrust/contrib/ruby_llm/patcher.rb 和 integration.rb 开始,然后对比 lib/braintrust/contrib/openai/instrumentation/moderations.rb 以及 openai/patcher.rb 第 131–170 行中的 moderation 模式。完成标准是:RubyLLM.moderate 及其 alias 已使用指定的输入、元数据、moderation 输出和延迟进行 instrument,integration 已注册,并且加载检测已更新。

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描述

Summary

RubyLLM.moderate is a model execution call that invokes OpenAI's moderation API to classify text for harmful content. It is not instrumented by the Braintrust Ruby SDK. The existing RubyLLM integration only patches RubyLLM::Chat.

This is distinct from issue #136 (RubyLLM embed, paint, and transcribe APIs not instrumented), which covers three other non-chat RubyLLM execution surfaces but explicitly omits moderation.

What is missing

RubyLLM.moderate("text") (aliased as RubyLLM::Moderation.moderate) makes a live API request to OpenAI's moderation endpoint using models such as omni-moderation-latest or text-moderation-007. It returns a RubyLLM::Moderation object with:

  • flagged — overall boolean
  • Per-category flags and confidence scores
  • id and model from the API response

This is the same class of execution call as the moderations already instrumented for the openai and ruby-openai integrations (ModerationsPatcher in both). A parallel RubyLLM::ModerationPatcher would follow the same pattern.

What a span should capture
  • Input: the text string being moderated
  • Metadata: model (e.g., omni-moderation-latest), provider (ruby_llm), endpoint
  • Output: flagged categories and scores (or summary)
  • Metrics: no token usage is returned by the moderation API, but latency should be captured

Braintrust docs status

not_found — The Braintrust RubyLLM integration docs at https://www.braintrust.dev/docs/integrations/sdk-integrations/ruby-llm cover chat completions and tool calls but do not mention moderation. The OpenAI provider docs at https://www.braintrust.dev/docs/providers/openai document moderation instrumentation via the openai gem but not via RubyLLM.

Upstream sources

Local files inspected

  • lib/braintrust/contrib/ruby_llm/patcher.rb — defines only ChatPatcher; no ModerationPatcher
  • lib/braintrust/contrib/ruby_llm/integration.rb — registers only [ChatPatcher]; loaded? checks defined?(::RubyLLM::Chat) only
  • lib/braintrust/contrib/openai/instrumentation/moderations.rb — demonstrates the existing moderation instrumentation pattern in this repo
  • lib/braintrust/contrib/openai/patcher.rb (lines 131–170) — ModerationsPatcher for reference
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从这里开始

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  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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