eve/dist/src/harness/emission.js

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

import{createActionResultEvent,createActionsRequestedEvent,createMessageAppendedEvent,createMessageCompletedEvent,createMessageReceivedEvent,createReasoningAppendedEvent,createReasoningCompletedEvent,createSessionCompletedEvent,createSessionFailedEvent,createSessionStartedEvent,createSessionWaitingEvent,createStepFailedEvent,createStepStartedEvent,createTurnCompletedEvent,createTurnFailedEvent,createTurnStartedEvent}from"#protocol/message.js";import{createRuntimeActionRequestFromToolCall,resolveToolCallInputObject}from"#harness/runtime-actions.js";import{hasEmptyDeliverySentinel}from"#shared/empty-delivery.js";import{createRuntimeToolResultFromStepResult,createRuntimeToolResultFromToolError,createToolResultMessagePartFromToolError}from"#harness/action-result-helpers.js";import{createInvalidToolCallInputError,isInvalidToolCall}from"#harness/tool-call-input-errors.js";import{createProviderStreamActionBatch}from"#harness/stream-actions.js";import{normalizeModelStreamError}from"#harness/model-call-error.js";import{createOrderedStreamEmitter}from"#harness/ordered-stream-emitter.js";import{interruptStreamOnFailure}from"#harness/interruptible-stream.js";import{isInlineAuthorizationToolResult}from"#harness/inline-tool-authorization.js";const HARNESS_EMISSION_STATE_KEY=`eve.harness.emission`,DEFAULT_EMISSION_STATE={sessionStarted:!1,sequence:0,stepIndex:0,turnId:``};function getHarnessEmissionState(e){return e?.[HARNESS_EMISSION_STATE_KEY]??DEFAULT_EMISSION_STATE}function isHarnessBetweenTurns(e){return getHarnessEmissionState(e.state).turnId===``}function setHarnessEmissionState(e,t){return{...e,state:{...e.state,[HARNESS_EMISSION_STATE_KEY]:t}}}async function emitTurnPreamble(e,t,n,r){let a=`turn_${n.sequence}`;return n.sessionStarted||await e(createSessionStartedEvent({runtime:r})),await e(createTurnStartedEvent({sequence:n.sequence,turnId:a})),t.message!==void 0&&await e(createMessageReceivedEvent({message:t.message,sequence:n.sequence,turnId:a})),{sessionStarted:!0,sequence:n.sequence,stepIndex:0,turnId:a}}async function emitStepStarted(e,t,n){await e(createStepStartedEvent({sequence:t.sequence,stepIndex:t.stepIndex,turnId:t.turnId}),n)}async function emitStepAndTurnFailed(e,t,n){await e(createStepFailedEvent({...n,sequence:t.sequence,stepIndex:t.stepIndex,turnId:t.turnId})),await e(createTurnFailedEvent({...n,sequence:t.sequence,turnId:t.turnId}))}async function emitFailedStep(e,t,n){await emitStepAndTurnFailed(e,t,n),await e(createSessionFailedEvent(n))}async function emitRecoverableFailedTurn(e,t,n){return await emitStepAndTurnFailed(e,t,n),await e(createSessionWaitingEvent(n.continuationToken)),{sessionStarted:t.sessionStarted,sequence:t.sequence+1,stepIndex:0,turnId:``}}function advanceStep(e){return{...e,stepIndex:e.stepIndex+1}}async function emitTurnEpilogue(e,t,n,r){return await e(createTurnCompletedEvent({sequence:t.sequence,turnId:t.turnId})),n===`conversation`?await e(createSessionWaitingEvent(r)):await e(createSessionCompletedEvent()),{sessionStarted:t.sessionStarted,sequence:t.sequence+1,stepIndex:0,turnId:``}}function normalizeAssistantStepFinishReason(e){switch(e){case`content-filter`:case`error`:case`length`:case`stop`:case`tool-calls`:return e;default:return`other`}}async function emitStreamContent(e,t,n,r){let i=createOrderedStreamEmitter(e),a=createProviderStreamActionBatch({emitFn:i.emit,state:t});try{return await consumeStreamContent(i.emit,t,interruptStreamOnFailure(n,i.failureSignal),a,r)}finally{try{await a.cancel()}finally{await i.closeAndDrain()}}}async function consumeStreamContent(i,o,s,c,l){let u=``,d=``,f=`stop`,p,m=new Set,h=new Set,g=new Set,_=new Set,v=new Set,y=new Set,b=[],x=[],flushCurrentMessage=async()=>{d.length!==0&&(await i(createMessageCompletedEvent({finishReason:`tool-calls`,message:d,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})),d=``)},emitActionRequest=async e=>{h.has(e.callId)||(d.trim().length>0&&await flushCurrentMessage(),h.add(e.callId),await i(createActionsRequestedEvent({actions:[e],sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})))},collectProviderToolCall=async e=>{_.has(e.toolCallId)||(_.add(e.toolCallId),!h.has(e.toolCallId)&&(h.add(e.toolCallId),d.trim().length>0&&await flushCurrentMessage(),c.observe({callId:e.toolCallId,input:resolveToolCallInputObject(e.input,{callId:e.toolCallId,toolName:e.toolName}),kind:`tool-call`,toolName:e.toolName})))},emitActionResult=async t=>{g.has(t.callId)||(g.add(t.callId),await i(createActionResultEvent({result:t,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})))},emitToolCall=async e=>{if(isInvalidToolCall(e)){y.add(e.toolCallId);return}if(!(l===void 0||l.excludedActionToolNames.has(e.toolName)))try{await emitActionRequest(createRuntimeActionRequestFromToolCall({toolCall:e,tools:l.tools}))}catch(t){if(t instanceof TypeError){let n=createInvalidToolCallInputError({error:t,toolCall:e});y.add(e.toolCallId),d.trim().length>0&&await flushCurrentMessage(),await emitActionResult(createRuntimeToolResultFromToolError(n)),v.add(e.toolCallId),x.push(createToolResultMessagePartFromToolError(n));return}throw t}};for await(let e of s)if(p===void 0)switch(e.type){case`reasoning-delta`:await c.flush(),u+=e.text,await i(createReasoningAppendedEvent({reasoningDelta:e.text,reasoningSoFar:u,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId}));break;case`text-delta`:await c.flush(),u.trim().length>0&&(await i(createReasoningCompletedEvent({reasoning:u,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})),u=``),d+=e.text,await i(createMessageAppendedEvent({messageDelta:e.text,messageSoFar:d,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId}));break;case`tool-call`:{let t=e;m.add(t.toolCallId),t.providerExecuted===!0?await collectProviderToolCall(t):(await c.flush(),await emitToolCall(t));break}case`tool-result`:{let t=e;if(t.preliminary===!0)break;if(t.providerExecuted===!0){await collectProviderToolCall({input:`input`in t?t.input:void 0,toolCallId:t.toolCallId,toolName:t.toolName}),await c.flush(),await emitActionResult(createRuntimeToolResultFromStepResult(t));break}if(m.has(e.toolCallId)){if(isInlineAuthorizationToolResult(t))break;h.has(e.toolCallId)&&(await emitActionResult(createRuntimeToolResultFromStepResult(t)),v.add(e.toolCallId));break}if(await c.flush(),await flushCurrentMessage(),isInlineAuthorizationToolResult(t)){v.add(e.toolCallId),b.push(t);break}await emitActionResult(createRuntimeToolResultFromStepResult(t)),v.add(e.toolCallId);break}case`tool-error`:{let t=e;t.providerExecuted===!0?(await collectProviderToolCall(t),await c.flush(),await emitActionResult(createRuntimeToolResultFromToolError(t))):h.has(t.toolCallId)&&(await emitActionResult(createRuntimeToolResultFromToolError(t)),v.add(t.toolCallId),x.push(createToolResultMessagePartFromToolError(t)));break}case`finish-step`:f=normalizeAssistantStepFinishReason(e.finishReason),await c.flush();break;case`error`:p=normalizeModelStreamError(e.error);break;case`abort`:throw new DOMException(e.reason??`The model stream was aborted.`,`AbortError`);default:break}if(await c.flush(),p!==void 0)throw p;return u.trim().length>0&&await i(createReasoningCompletedEvent({reasoning:u,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})),f!==`tool-calls`&&hasEmptyDeliverySentinel(d)?await i(createMessageCompletedEvent({finishReason:f,message:null,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})):d.trim().length>0&&await i(createMessageCompletedEvent({finishReason:f,message:d,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})),{emittedActionCallIds:h,handledInlineToolResultCallIds:v,invalidInputToolCallIds:y,inlineAuthorizationResults:b,trailingInlineToolResultParts:x}}export{advanceStep,emitFailedStep,emitRecoverableFailedTurn,emitStepStarted,emitStreamContent,emitTurnEpilogue,emitTurnPreamble,getHarnessEmissionState,isHarnessBetweenTurns,normalizeAssistantStepFinishReason,setHarnessEmissionState};