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[bot] RubyLLM::Judge (typed judgments) not instrumented

Aperta
  • Qualcosa non va?
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Valutazione

Difficoltà
3/5
Tempo stimato
1-2 giorni
Idoneità per principianti
45/100
Tipo di issue
Funzionalità
Chiarezza
Abbastanza chiara
Stato di attività
Attiva
Stack tecnologico
ruby
Ambito
ai, observability

Direzione di ricerca

Start with the patchers list in lib/braintrust/contrib/ruby_llm/integration.rb (around line 49), which currently returns only ChatPatcher, and read patcher.rb plus instrumentation/chat.rb and common.rb to see how spans capture model and usage. Add a judge patcher that wraps RubyLLM::Judge.judge, following the same structure. Done when a judge call produces a span with the questions, input, answers, resolved model, and cost, verified by a test alongside the existing ruby_llm tests.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

ruby

<!-- provider-gap-audit: ruby-llm-judge-not-instrumented -->

Summary

ruby_llm 2.1.0 (released 2026-10-08) introduced RubyLLM::Judge / RubyLLM.judge — a typed-question inference API ("judgments") that returns probabilities, choices, and scores over application data. It is a distinct generative execution surface from Chat#complete (different entry point, different request/response shape, its own default model config, its own cost accounting), and is completely uninstrumented.

This is the same category of gap this SDK has already tracked for RubyLLM.embed/.paint/.transcribe (#136) — a top-level RubyLLM inference API outside Chat that the current integration, which only patches Chat#complete/#execute_tool, cannot see.

What is missing

The ruby_llm integration registers exactly one patcher:

# lib/braintrust/contrib/ruby_llm/integration.rb:49
[ChatPatcher]

and lib/braintrust/contrib/ruby_llm/instrumentation/ contains only chat.rb and common.rb. There is no patcher for RubyLLM::Judge.judge / RubyLLM.judge.

A judgment call takes typed questions (predicate/choice/score), optional structured/image input, and returns a Judgment with named answers, probabilities/confidence, model identity, and cost. Expected instrumentation: a span per judge call capturing the declared questions (names/types), the input, the returned answers (values/probabilities/scores), the resolved model, and token usage/cost (via Judgment#cost) — mirroring how ChatPatcher captures model/usage today.

Braintrust docs status

not_found — https://www.braintrust.dev/docs/integrations/sdk-integrations/ruby-llm documents chat completion spans, tool execution spans, token usage, streaming, and multimodal content for the ruby_llm integration. No mention of judgments/RubyLLM::Judge anywhere on the page.

Upstream sources

Local repo files inspected

  • lib/braintrust/contrib/ruby_llm/integration.rb (line 49) — patchers returns only [ChatPatcher]
  • lib/braintrust/contrib/ruby_llm/patcher.rb — only defines ChatPatcher (wraps RubyLLM::Chat#complete/#execute_tool)
  • lib/braintrust/contrib/ruby_llm/instrumentation/ — contains only chat.rb, common.rb; no judge.rb
  • Grep for Judge/judge across lib/ — zero matches outside unrelated eval-scorer terminology in lib/braintrust/eval.rb (Braintrust's own LLM-as-judge scorers, unrelated to RubyLLM::Judge)
  • Appraisals — ruby_llm minimum tested version is 1.8, latest is >= 2.0, so the appraisal matrix already exercises gem versions that ship RubyLLM::Judge
Lingua principale
Ruby
Stelle
9
Fork
11
Merge medio
3g 43m
PR unite (30g)
9

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