eve/dist/src/harness/emission.js

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

import{createActionInputAppendedEvent,createActionPartialEvent,createActionResultEvent,createActionsRequestedEvent,createMessageAppendedEvent,createMessageCompletedEvent,createMessageReceivedEvent,createReasoningAppendedEvent,createReasoningCompletedEvent,createSessionCompletedEvent,createSessionFailedEvent,createSessionStartedEvent,createSessionWaitingEvent,createStepFailedEvent,createStepStartedEvent,createTurnCompletedEvent,createTurnFailedEvent,createTurnStartedEvent}from"#protocol/message.js";import{createRuntimeToolResultFromStepResult,createRuntimeToolResultFromToolError,createToolResultMessagePartFromToolError}from"#harness/action-result-helpers.js";import{hasEmptyDeliverySentinel}from"#shared/empty-delivery.js";import{createInvalidToolCallInputError,isInvalidToolCall,resolveProviderToolCallRequest}from"#harness/tool-call-input-errors.js";import{collectActionPresentation,createPresentedRuntimeActionRequestFromToolCall}from"#harness/action-presentation.js";import{projectDeltaPresentation,projectResultPresentation}from"#harness/tool-presentation.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";import{normalizeAssistantStepFinishReason}from"#harness/finish-reason.js";import{getHarnessEmissionState,isHarnessBetweenTurns,setHarnessEmissionState}from"#harness/emission-state.js";async function emitTurnPreamble(e,t,n,r,i){let a=`turn_${n.sequence}`;return n.sessionStarted||await e(createSessionStartedEvent({runtime:r,trace:i})),await e(createTurnStartedEvent({sequence:n.sequence,trace:i,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,r){await e(createStepStartedEvent({modelId:n,sequence:t.sequence,stepIndex:t.stepIndex,turnId:t.turnId}),r)}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()),{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){return await e(createTurnCompletedEvent({sequence:t.sequence,turnId:t.turnId})),n===`conversation`?await e(createSessionWaitingEvent()):await e(createSessionCompletedEvent()),{sessionStarted:t.sessionStarted,sequence:t.sequence+1,stepIndex:0,turnId:``}}function readSubagentBackgroundTaskReceipt(e,t){if(e.isError===!0||t?.get(e.toolName)?.resultKind!==`subagent`||typeof e.output!=`object`||e.output===null||Array.isArray(e.output))return;let n=Reflect.get(e.output,`status`),r=Reflect.get(e.output,`taskId`);return n===`working`&&typeof r==`string`?{status:n,taskId:r}:void 0}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(e,t,n,r,i){let a=``,o=``,s=`stop`,c,l=new Set,u=new Set,d=new Set,f=new Set,p=new Set,m=new Set,h=[],g=[],_=new Map,v=new Map,flushCurrentMessage=async()=>{o.length!==0&&(await e(createMessageCompletedEvent({finishReason:`tool-calls`,message:o,sequence:t.sequence,stepIndex:t.stepIndex,turnId:t.turnId})),o=``)},emitActionInput=async(n,r,i)=>e(createActionInputAppendedEvent({callId:n,inputTextDelta:i,sequence:t.sequence,stepIndex:t.stepIndex,toolName:r,turnId:t.turnId})),emitActionRequest=async n=>{let{action:r}=n;u.has(r.callId)||(o.trim().length>0&&await flushCurrentMessage(),u.add(r.callId),_.set(r.callId,r.input),await e(createActionsRequestedEvent({actions:[r],presentation:collectActionPresentation([n]),sequence:t.sequence,stepIndex:t.stepIndex,turnId:t.turnId})))},collectProviderToolCall=async e=>{if(f.has(e.toolCallId)||(f.add(e.toolCallId),u.has(e.toolCallId)))return;u.add(e.toolCallId),o.trim().length>0&&await flushCurrentMessage();let t=resolveProviderToolCallRequest(e,i?.tools??new Map);if(t.toolError!==void 0){m.add(e.toolCallId),await emitActionResult(createRuntimeToolResultFromToolError(t.toolError)),p.add(e.toolCallId),g.push(createToolResultMessagePartFromToolError(t.toolError));return}_.set(t.request.action.callId,t.request.action.input),r.observe(t.request)},emitActionResult=async n=>{if(d.has(n.callId))return;d.add(n.callId);let r=readSubagentBackgroundTaskReceipt(n,i?.tools);r!==void 0&&await e({data:{backgroundTask:r,callId:n.callId,output:typeof n.output==`string`?n.output:JSON.stringify(n.output),subagentName:n.toolName},type:`subagent.completed`});let a=n.isError===!0?void 0:projectResultPresentation(i?.tools.get(n.toolName),n.callId,_.get(n.callId),n.output);await e(createActionResultEvent({presentation:a,result:n,sequence:t.sequence,stepIndex:t.stepIndex,turnId:t.turnId}))},emitActionPartial=async n=>{let r=projectDeltaPresentation(i?.tools.get(n.toolName),n.callId,_.get(n.callId),n.output);await e(createActionPartialEvent({presentation:r,result:n,sequence:t.sequence,stepIndex:t.stepIndex,turnId:t.turnId}))},emitToolCall=async e=>{if(isInvalidToolCall(e)){m.add(e.toolCallId);return}if(!(i===void 0||i.excludedActionToolNames.has(e.toolName)))try{await emitActionRequest(createPresentedRuntimeActionRequestFromToolCall({toolCall:e,tools:i.tools}))}catch(t){if(t instanceof TypeError){let n=createInvalidToolCallInputError({error:t,toolCall:e});m.add(e.toolCallId),o.trim().length>0&&await flushCurrentMessage(),await emitActionResult(createRuntimeToolResultFromToolError(n)),p.add(e.toolCallId),g.push(createToolResultMessagePartFromToolError(n));return}throw t}};for await(let d of n)if(c===void 0)switch(d.type){case`reasoning-delta`:await r.flush(),a+=d.text,await e(createReasoningAppendedEvent({reasoningDelta:d.text,sequence:t.sequence,stepIndex:t.stepIndex,turnId:t.turnId}));break;case`text-delta`:await r.flush(),a.trim().length>0&&(await e(createReasoningCompletedEvent({reasoning:a,sequence:t.sequence,stepIndex:t.stepIndex,turnId:t.turnId})),a=``),o+=d.text,await e(createMessageAppendedEvent({messageDelta:d.text,sequence:t.sequence,stepIndex:t.stepIndex,turnId:t.turnId}));break;case`tool-input-start`:if(i===void 0||d.providerExecuted===!0||i.excludedActionToolNames.has(d.toolName)){v.delete(d.id);break}await r.flush(),o.trim().length>0&&await flushCurrentMessage(),v.set(d.id,{toolName:d.toolName});break;case`tool-input-delta`:{let e=v.get(d.id);if(e===void 0)break;await r.flush(),await emitActionInput(d.id,e.toolName,d.delta);break}case`tool-input-end`:v.delete(d.id);break;case`tool-call`:{let e=d;v.delete(e.toolCallId),l.add(e.toolCallId),e.providerExecuted===!0?await collectProviderToolCall(e):(await r.flush(),await emitToolCall(e));break}case`tool-result`:{let e=d;if(e.preliminary===!0){e.providerExecuted!==!0&&await emitActionPartial(createRuntimeToolResultFromStepResult(e));break}if(e.providerExecuted===!0){await collectProviderToolCall({input:`input`in e?e.input:void 0,toolCallId:e.toolCallId,toolName:e.toolName}),await r.flush(),await emitActionResult(createRuntimeToolResultFromStepResult(e));break}if(l.has(d.toolCallId)){if(isInlineAuthorizationToolResult(e))break;u.has(d.toolCallId)&&(await emitActionResult(createRuntimeToolResultFromStepResult(e)),p.add(d.toolCallId));break}if(await r.flush(),await flushCurrentMessage(),isInlineAuthorizationToolResult(e)){p.add(d.toolCallId),h.push(e);break}await emitActionResult(createRuntimeToolResultFromStepResult(e)),p.add(d.toolCallId);break}case`tool-error`:{let e=d;e.providerExecuted===!0?(await collectProviderToolCall(e),await r.flush(),await emitActionResult(createRuntimeToolResultFromToolError(e))):u.has(e.toolCallId)&&(await emitActionResult(createRuntimeToolResultFromToolError(e)),p.add(e.toolCallId),g.push(createToolResultMessagePartFromToolError(e)));break}case`finish-step`:s=normalizeAssistantStepFinishReason(d.finishReason),await r.flush();break;case`error`:c=normalizeModelStreamError(d.error);break;case`abort`:throw new DOMException(d.reason??`The model stream was aborted.`,`AbortError`)}if(await r.flush(),c!==void 0)throw c;return a.trim().length>0&&await e(createReasoningCompletedEvent({reasoning:a,sequence:t.sequence,stepIndex:t.stepIndex,turnId:t.turnId})),s!==`content-filter`&&s!==`tool-calls`&&hasEmptyDeliverySentinel(o)?await e(createMessageCompletedEvent({finishReason:s,message:null,sequence:t.sequence,stepIndex:t.stepIndex,turnId:t.turnId})):s!==`content-filter`&&o.trim().length>0&&await e(createMessageCompletedEvent({finishReason:s,message:o,sequence:t.sequence,stepIndex:t.stepIndex,turnId:t.turnId})),{emittedActionCallIds:u,handledInlineToolResultCallIds:p,invalidInputToolCallIds:m,inlineAuthorizationResults:h,trailingInlineToolResultParts:g}}export{advanceStep,emitFailedStep,emitRecoverableFailedTurn,emitStepStarted,emitStreamContent,emitTurnEpilogue,emitTurnPreamble,getHarnessEmissionState,isHarnessBetweenTurns,setHarnessEmissionState};