eve
Version:
Filesystem-first framework for durable backend AI agents that run anywhere.
3 lines (2 loc) • 4.91 kB
JavaScript
import{formatAvailableSkillsSection}from"#execution/skills/instructions.js";const DEFAULT_ROOT_MAX_INPUT_TOKENS_PER_SESSION=4e7;function createCompactionConfig(e={}){let t=e.thresholdPercent??.9,n={recentWindowSize:10,threshold:e.contextWindowTokens===void 0?1e5:Math.max(1,Math.floor(e.contextWindowTokens*t))};return e.lastKnownInputTokens===void 0?n:{...n,lastKnownInputTokens:e.lastKnownInputTokens,lastKnownPromptMessageCount:e.lastKnownPromptMessageCount}}function createSession(e){let{turnAgent:t}=e,n=createSessionToolDefinitions(t),r={agent:{compactionModelReference:t.compactionModel,dynamicModelDefaultReference:t.dynamicModel===void 0?void 0:t.model,modelReference:t.model,reasoning:t.reasoning,system:createSessionSystemPrompt({turnAgent:t}),tools:n},compaction:createCompactionConfig({contextWindowTokens:t.model.contextWindowTokens,thresholdPercent:e.compactionOverrides?.thresholdPercent}),continuationToken:e.continuationToken,history:[],sessionId:e.sessionId};return e.rootSessionId!==void 0&&(r.rootSessionId=e.rootSessionId),r.limits=resolveSessionLimits(e),e.outputSchema!==void 0&&(r.outputSchema=e.outputSchema),e.subagentDepth!==void 0&&(r.subagentDepth=e.subagentDepth),e.workflowMaxSubagents!==void 0&&(r.workflowMaxSubagents=e.workflowMaxSubagents),r}function refreshSessionFromTurnAgent(e){return{...e.session,agent:{compactionModelReference:e.turnAgent.compactionModel,dynamicModelDefaultReference:e.turnAgent.dynamicModel===void 0?void 0:e.turnAgent.model,modelReference:e.turnAgent.model,reasoning:e.turnAgent.reasoning,system:createSessionSystemPrompt({turnAgent:e.turnAgent}),tools:createSessionToolDefinitions(e.turnAgent)},compaction:createCompactionConfig({contextWindowTokens:e.turnAgent.model.contextWindowTokens,lastKnownInputTokens:e.session.compaction.lastKnownInputTokens,lastKnownPromptMessageCount:e.session.compaction.lastKnownPromptMessageCount,thresholdPercent:e.compactionOverrides?.thresholdPercent})}}function createSessionSystemPrompt(t){let n=formatAvailableSkillsSection(t.turnAgent.availableSkills??[]);return(n===null?t.turnAgent.instructions:[...t.turnAgent.instructions,n]).join(`
`)}function mintSubagentContinuationToken(e){return`subagent:${e??crypto.randomUUID()}`}function projectToDurableSession(e){let t={agent:{system:e.agent.system},continuationToken:e.continuationToken,history:e.history,sessionId:e.sessionId};return(e.compaction.lastKnownInputTokens!==void 0||e.compaction.lastKnownPromptMessageCount!==void 0)&&(t.compaction={lastKnownInputTokens:e.compaction.lastKnownInputTokens,lastKnownPromptMessageCount:e.compaction.lastKnownPromptMessageCount}),e.rootSessionId!==void 0&&(t.rootSessionId=e.rootSessionId),e.limits!==void 0&&(t.limits=e.limits),e.outputSchema!==void 0&&(t.outputSchema=e.outputSchema),e.sandboxState!==void 0&&(t.sandboxState=e.sandboxState),e.state!==void 0&&(t.state=e.state),e.subagentDepth!==void 0&&(t.subagentDepth=e.subagentDepth),e.workflowMaxSubagents!==void 0&&(t.workflowMaxSubagents=e.workflowMaxSubagents),t}function hydrateDurableSession(e){let{durable:t,turnAgent:n}=e,r=createSessionToolDefinitions(n),i={agent:{compactionModelReference:n.compactionModel,dynamicModelDefaultReference:n.dynamicModel===void 0?void 0:n.model,modelReference:n.model,reasoning:n.reasoning,system:t.agent.system,tools:r},compaction:createCompactionConfig({contextWindowTokens:n.model.contextWindowTokens,lastKnownInputTokens:t.compaction?.lastKnownInputTokens,lastKnownPromptMessageCount:t.compaction?.lastKnownPromptMessageCount,thresholdPercent:e.compactionOverrides?.thresholdPercent}),continuationToken:t.continuationToken,history:t.history,sessionId:t.sessionId};return t.rootSessionId!==void 0&&(i.rootSessionId=t.rootSessionId),t.limits!==void 0&&(i.limits=t.limits),t.outputSchema!==void 0&&(i.outputSchema=t.outputSchema),t.sandboxState!==void 0&&(i.sandboxState=t.sandboxState),t.state!==void 0&&(i.state=t.state),t.subagentDepth!==void 0&&(i.subagentDepth=t.subagentDepth),t.workflowMaxSubagents!==void 0&&(i.workflowMaxSubagents=t.workflowMaxSubagents),i}function createSessionToolDefinitions(e){return e.tools.map(e=>({description:e.description??``,inputSchema:e.inputSchema,name:e.name,outputSchema:e.outputSchema}))}function resolveSessionLimits(e){let n=e.subagentDepth!==void 0&&e.subagentDepth>0,r=resolveSessionTokenLimit({authored:e.limits?.maxInputTokensPerSession,fallback:n?void 0:DEFAULT_ROOT_MAX_INPUT_TOKENS_PER_SESSION}),i=resolveSessionTokenLimit({authored:e.limits?.maxOutputTokensPerSession,fallback:void 0}),a={};return r!==void 0&&(a.maxInputTokensPerSession=r),i!==void 0&&(a.maxOutputTokensPerSession=i),a}function resolveSessionTokenLimit(e){return e.authored===!1?void 0:e.authored??e.fallback}export{DEFAULT_ROOT_MAX_INPUT_TOKENS_PER_SESSION,createCompactionConfig,createSession,hydrateDurableSession,mintSubagentContinuationToken,projectToDurableSession,refreshSessionFromTurnAgent};