eve/dist/src/harness/emission.js

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

import{toError}from"#shared/errors.js";import{createActionResultEvent,createActionsRequestedEvent,createMessageAppendedEvent,createMessageCompletedEvent,createMessageReceivedEvent,createReasoningAppendedEvent,createReasoningCompletedEvent,createSessionCompletedEvent,createSessionFailedEvent,createSessionStartedEvent,createSessionWaitingEvent,createStepFailedEvent,createStepStartedEvent,createTurnCompletedEvent,createTurnFailedEvent,createTurnStartedEvent}from"#protocol/message.js";import{contextStorage}from"#context/container.js";import{resolveToolCallInputObject}from"#harness/runtime-actions.js";import{isAuthorizationSignal,isPendingAuthorizationToolOutput}from"#harness/authorization.js";import{createRuntimeToolResultFromStepResult,createRuntimeToolResultFromValue}from"#harness/action-result-helpers.js";import{readToolInterrupt}from"#harness/tool-interrupts.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 i=`turn_${n.sequence}`;return n.sessionStarted||await e(createSessionStartedEvent({runtime:r})),await e(createTurnStartedEvent({sequence:n.sequence,turnId:i})),t.message!==void 0&&await e(createMessageReceivedEvent({message:t.message,sequence:n.sequence,turnId:i})),{sessionStarted:!0,sequence:n.sequence,stepIndex:0,turnId:i}}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()),{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 normalizeAssistantStepFinishReason(e){switch(e){case`content-filter`:case`error`:case`length`:case`stop`:case`tool-calls`:return e;default:return`other`}}async function emitStreamContent(a,o,s){let c=``,l=``,u=`stop`,d,f=new Set,p=new Set,m=new Set,h=[],g=[],flushCurrentMessage=async()=>{l.length!==0&&(await a(createMessageCompletedEvent({finishReason:`tool-calls`,message:l,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})),l=``)},emitProviderToolCall=async e=>{p.has(e.toolCallId)||(p.add(e.toolCallId),await a(createActionsRequestedEvent({actions:[{callId:e.toolCallId,input:resolveToolCallInputObject(e.input,{callId:e.toolCallId,toolName:e.toolName}),kind:`tool-call`,toolName:e.toolName}],sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})))};for await(let n of s)if(d===void 0)switch(n.type){case`reasoning-delta`:c+=n.text,await a(createReasoningAppendedEvent({reasoningDelta:n.text,reasoningSoFar:c,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId}));break;case`text-delta`:c.trim().length>0&&(await a(createReasoningCompletedEvent({reasoning:c,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})),c=``),l+=n.text,await a(createMessageAppendedEvent({messageDelta:n.text,messageSoFar:l,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId}));break;case`tool-call`:{let e=n;f.add(e.toolCallId),e.providerExecuted===!0&&await emitProviderToolCall(e);break}case`tool-result`:{let e=n;if(e.providerExecuted===!0){await emitProviderToolCall({input:`input`in e?e.input:void 0,toolCallId:e.toolCallId,toolName:e.toolName}),await a(createActionResultEvent({result:createRuntimeToolResultFromStepResult(e),sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId}));break}if(f.has(n.toolCallId))break;if(await flushCurrentMessage(),isInlineAuthorizationToolResult(e)){m.add(n.toolCallId),h.push(e);break}await a(createActionResultEvent({result:createRuntimeToolResultFromStepResult(e),sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})),m.add(n.toolCallId);let r=e.output;g.push({type:`tool-result`,toolCallId:e.toolCallId,toolName:e.toolName,output:typeof r==`string`?{type:`text`,value:r}:{type:`json`,value:r??null}});break}case`tool-error`:{let r=n;r.providerExecuted===!0&&(await emitProviderToolCall(r),await a(createActionResultEvent({result:createRuntimeToolResultFromValue({callId:r.toolCallId,isError:!0,output:toError(r.error),toolName:r.toolName}),sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})));break}case`finish-step`:u=normalizeAssistantStepFinishReason(n.finishReason);break;case`error`:d=toError(n.error);break;default:break}if(d!==void 0)throw d;return c.trim().length>0&&await a(createReasoningCompletedEvent({reasoning:c,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})),l.length>0&&await a(createMessageCompletedEvent({finishReason:u,message:l,sequence:o.sequence,stepIndex:o.stepIndex,turnId:o.turnId})),{handledInlineToolResultCallIds:m,inlineAuthorizationResults:h,inlineToolResultParts:g}}function isInlineAuthorizationToolResult(e){if(isPendingAuthorizationToolOutput(e.output))return!0;let t=contextStorage.getStore();if(t===void 0)return!1;let n=readToolInterrupt(t,e.toolCallId);return n!==void 0&&isAuthorizationSignal(n)}export{advanceStep,emitFailedStep,emitRecoverableFailedTurn,emitStepStarted,emitStreamContent,emitTurnEpilogue,emitTurnPreamble,getHarnessEmissionState,isHarnessBetweenTurns,normalizeAssistantStepFinishReason,setHarnessEmissionState};