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eve

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

github.com/vercel/eve

vercel/eve

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import{toErrorMessage}from"#shared/errors.js";import{AssertionCollector}from"#evals/assertions/collector.js";import{scopeEvalTargetHandle}from"#evals/target.js";import{EvalSessionManager}from"#evals/session-manager.js";import{EvalRequirementFailed,EvalSkipped}from"#evals/control-flow.js";import{runUntilAborted}from"#evals/abort.js";import{createEmptyDerivedFacts}from"#evals/runner/derive-run-facts.js";import{createEvalContext}from"#evals/context.js";async function executeTask(e){let{client:t,evaluation:n,target:r,timeoutMs:i}=e,a=i===void 0?neverAbortSignal():AbortSignal.timeout(i),o=new AssertionCollector,s=new EvalSessionManager({client:t,collector:o,onSessionStart:e.onSessionStart,signal:a}),c=scopeEvalTargetHandle(r,{sessions:s}),l=[],{context:u}=createEvalContext({setupContext:e.setupContext,collector:o,manager:s,target:c,signal:a,judge:n.judge,log:t=>{l.push(t),e.onLog?.(t)}}),d,f;try{await runUntilAborted(n.test(u),a)}catch(e){e instanceof EvalSkipped?f=e.reason:e instanceof EvalRequirementFailed||(d=toErrorMessage(e))}if(i!==void 0&&a.aborted){let e=(await s.cleanup(AbortSignal.timeout(5e3))).flatMap(e=>e.status===`rejected`?[toErrorMessage(e.reason)]:[]);if(e.length>0){let t=`Eval timeout cleanup failed: ${e.join(`; `)}`;d=d===void 0?t:`${d}\n${t}`}}let p=buildTaskResult({logs:l,sessions:s.snapshots(),turn:s.lastTurnSession()?.lastTurn});return{result:p,assertions:await o.finalize(p),error:d,skipReason:f}}function buildTaskResult(e){let t=e.sessions.flatMap(e=>e.events),n=e.turn?.message??null;return{output:e.turn?.data===void 0?n:e.turn.data,finalMessage:n,sessionId:selectPrimarySessionId(e.sessions),status:e.turn?.status??`completed`,events:t,logs:e.logs,derived:combineDerivedFacts(e.sessions),sessions:e.sessions,runtimeIdentity:extractRuntimeIdentity(t),traceContexts:collectTraceContexts(e.sessions)}}function collectTraceContexts(e){return e.flatMap(e=>{let t=e.sessionId;return t===void 0?[]:e.traceContexts.map(n=>({...n,primary:e.primary,sessionId:t}))})}function combineDerivedFacts(e){if(e.length===0)return createEmptyDerivedFacts();let t=e.flatMap(e=>e.derived.toolCalls),n=e.flatMap(e=>e.derived.subagentCalls),r=e.flatMap(e=>e.derived.inputRequests),i=e.find(e=>e.derived.failureCode!==void 0)?.derived.failureCode;return{toolCalls:t,toolCallCount:t.length,subagentCalls:n,subagentCallCount:n.length,inputRequests:r,parked:e.some(e=>e.derived.parked),messageCount:sum(e,e=>e.derived.messageCount),reasoningBlockCount:sum(e,e=>e.derived.reasoningBlockCount),failureCode:i}}function selectPrimarySessionId(e){return e.find(e=>e.primary)?.sessionId??e[0]?.sessionId}function extractRuntimeIdentity(e){for(let t of e)if(t.type===`session.started`&&t.data.runtime!==void 0)return t.data.runtime}function sum(e,t){return e.reduce((e,n)=>e+t(n),0)}function neverAbortSignal(){return new AbortController().signal}export{executeTask};