eve/dist/src/evals/judge.js

Filesystem-first framework for durable backend AI agents that run anywhere.

import{formatDiagnosticValue,toDiagnosticMetadataValue}from"#evals/diagnostics.js";import{evaluate}from"#ai/evaluate.js";import{runUntilAborted}from"#evals/abort.js";function buildJudgeContext(e){function judge(t,n){let r=typeof t==`object`&&`questions`in t,i=r?t.questions:{judgment:typeof t==`string`?{type:`boolean`,instructions:t}:t},a=Object.entries(i);if(a.length===0)throw Error(`Judge questions must be a non-empty map.`);let o=r&&t.state!==void 0?t.state:{input:e.getInput(),output:!r&&n?.on!==void 0?n.on:e.getReply()??``},s=n?.model??e.judge?.model,c=n?.modelOptions??e.judge?.modelOptions,l=runUntilAborted((async()=>{let t=structuredClone(o),n=structuredClone(i),r=Object.fromEntries(Object.entries(n).map(([e,t])=>{if(t.type!==`choice`)return[e,t];let{expected:n,...r}=t;if(typeof n!=`string`||!Object.hasOwn(t.criteria,n))throw Error(`Judge question "${e}" expected must name an option in criteria.`);return[e,r]}));return{result:await evaluate({model:s,state:t,questions:r,providerOptions:c?.providerOptions,abortSignal:e.signal}),state:t,questions:n}})(),e.signal),u=Object.fromEntries(a.map(([t,n])=>[t,e.collector.recordValue({name:`judge.${n.type}${r?`.${t}`:``}`,severity:`soft`,score:async()=>{let{result:e,state:n,questions:i}=await l,a=i[t],o=e.answers[t],s=judgeScore(a,o);return{score:s,message:formatJudgeDetail(n,a,o),metadata:{judge:e.response.modelId,questionId:t,question:a,state:n,answer:o,score:s,usage:e.usage,usageScope:r?`batch`:`assertion`,warnings:e.warnings,rounding:e.rounding,providerMetadata:e.providerMetadata,response:toDiagnosticMetadataValue(e.response)}}}})]));return r?u:u.judgment}return judge}function formatJudgeDetail(e,t,n){return[[`state`,e],[`question`,t],[`answer`,n]].map(([e,t])=>`${e}: ${formatDiagnosticValue(t)}`).join(`
`)}function judgeScore(e,t){switch(t.type){case`boolean`:return t.probability;case`score`:if(e.type===`score`)return t.score/(e.criteria.length-1);break;case`choice`:if(e.type===`choice`)return+(t.choice===e.expected)}throw Error(`Evaluation answer does not match the judge question.`)}export{buildJudgeContext};