{
  "version": 3,
  "sources": ["../../src/app/ai/agents/evals/export/loadEvalExportDocument.ts"],
  "sourcesContent": ["import type { Asset, AssetWithOwnerTypes } from \"@framerjs/assets\"\nimport { Store } from \"@framerjs/crdtree2\"\nimport { assert } from \"@framerjs/shared\"\nimport type { Agent } from \"app/ai/agents/Agent.ts\"\nimport { cloneContextRuntimeState, type ContextRuntimeState } from \"app/ai/agents/context/AgentContext.ts\"\nimport { experiments } from \"app/experiments.ts\"\nimport { EngineChange } from \"document/EngineChanges.ts\"\nimport type { VekterEngine } from \"document/VekterEngine.ts\"\nimport { loadSnapshot, type LatestAgentStorageSnapshot } from \"document/agentSnapshotMigration/index.ts\"\nimport type { LatestAgentSchemas } from \"document/agentSnapshotMigration/schemas.ts\"\nimport { CrdtDocumentLoader } from \"document/crdt/sync/CrdtDocumentLoader.ts\"\nimport { mergeAndGetPatches } from \"document/crdt/sync/crdtTreeUpdater.ts\"\nimport { CanvasTreeVersion } from \"document/models/CanvasTree/CanvasTreeVersion.ts\"\nimport type { ExternalModuleEvaluationMode } from \"document/stores/LoadedExternalModulesStore.ts\"\nimport { fontStore } from \"library/render/fonts/fontStore.ts\"\nimport { isUndefined } from \"utils/typeChecks.ts\"\nimport type { EvalExportArchiveSnapshot } from \"./AgentStoreEvalExport.ts\"\nimport type { EvalExportV1 } from \"./evalExportTypes.ts\"\n\nexport interface LoadEvalExportOptions {\n\treplayTarget?: {\n\t\trequestId?: string\n\t\tincludedStepCount?: number\n\t}\n\texternalModuleEvaluationMode?: ExternalModuleEvaluationMode\n}\n\ntype PersistedAgentHydrationRequest = LatestAgentSchemas.PersistedAgentSnapshot[\"history\"][number]\ntype PersistedAgentHydrationStep = PersistedAgentHydrationRequest[\"steps\"][number]\n\ninterface ResolvedEvalExportReplayTarget {\n\trequestId: string\n\trequestIndex: number\n\trequest: PersistedAgentHydrationRequest\n\tincludedStepCount?: number\n\tscopeId: LatestAgentSchemas.PersistedAgentSnapshot[\"scopeId\"]\n\tagentSnapshot: LatestAgentSchemas.PersistedAgentSnapshot\n}\n\nfunction getEvalExportCrdtBaseCapture(archiveSnapshot: EvalExportArchiveSnapshot): {\n\tbase: Uint8Array\n\tbaseRowIndex: number\n} {\n\tconst base = archiveSnapshot.files.find(file => file.path === archiveSnapshot.manifest.crdt.baseBinaryPath)?.data\n\tassert(base, \"Eval export archive is missing the CRDT base binary.\")\n\treturn {\n\t\tbase,\n\t\tbaseRowIndex: archiveSnapshot.manifest.crdt.baseRowIndex,\n\t}\n}\n\nfunction loadEvalExportAgentStorageSnapshot(manifest: EvalExportV1): LatestAgentStorageSnapshot {\n\tconst loadedSnapshot = loadSnapshot(manifest.agent.storageSnapshot)\n\tassert(loadedSnapshot, \"Eval export agent snapshot failed to parse or migrate.\")\n\tassert(loadedSnapshot.snapshot.agents.length === 1, \"Eval export must contain exactly one agent snapshot.\")\n\treturn loadedSnapshot.snapshot\n}\n\nfunction getEvalExportAgentSnapshot(manifest: EvalExportV1): LatestAgentSchemas.PersistedAgentSnapshot {\n\tconst storageSnapshot = loadEvalExportAgentStorageSnapshot(manifest)\n\tconst snapshot =\n\t\tstorageSnapshot.agents.find(candidate => candidate.id === storageSnapshot.activeChatAgentId) ??\n\t\tstorageSnapshot.agents[0]\n\tassert(snapshot, \"Eval export is missing its agent snapshot.\")\n\treturn snapshot\n}\n\nfunction assertContextRuntimeStateForStepReplayTarget(replayTarget: ResolvedEvalExportReplayTarget): void {\n\tconst runtimeState = getReplayTargetRuntimeState(replayTarget)\n\tassert(\n\t\truntimeState,\n\t\t`Eval export is missing runtime snapshot for request '${replayTarget.requestId}' with ${replayTarget.includedStepCount} included steps. Re-export with step runtime snapshots or replay the request boundary.`,\n\t)\n}\n\nexport function resolveEvalExportReplayTarget(\n\tmanifest: EvalExportV1,\n\toptions: LoadEvalExportOptions = {},\n): ResolvedEvalExportReplayTarget {\n\tconst agentSnapshot = getEvalExportAgentSnapshot(manifest)\n\n\tconst requestId =\n\t\toptions.replayTarget?.requestId ?? getLatestCompleteRequestBoundaryRequest(manifest, agentSnapshot).id\n\tconst requestIndex = agentSnapshot.history.findIndex(candidate => candidate.id === requestId)\n\tassert(requestIndex >= 0, \"Requested replay request was not found in the eval export history.\", requestId)\n\tconst request = agentSnapshot.history[requestIndex]\n\tassert(request, \"Requested replay request was not found in the eval export history.\", requestId)\n\tconst scopeId = request.scopeId ?? agentSnapshot.scopeId\n\n\tconst includedStepCount = options.replayTarget?.includedStepCount\n\tif (includedStepCount !== undefined) {\n\t\tassert(\n\t\t\tNumber.isInteger(includedStepCount) && includedStepCount >= 0,\n\t\t\t\"Included step count must be a non-negative integer.\",\n\t\t\trequestId,\n\t\t\tincludedStepCount,\n\t\t)\n\t\tassert(\n\t\t\tincludedStepCount <= request.steps.length,\n\t\t\t\"Included step count exceeds persisted request steps.\",\n\t\t\trequestId,\n\t\t\tincludedStepCount,\n\t\t)\n\t\tconst replayTarget = {\n\t\t\trequestId: request.id,\n\t\t\trequestIndex,\n\t\t\trequest,\n\t\t\tincludedStepCount,\n\t\t\tscopeId,\n\t\t\tagentSnapshot,\n\t\t}\n\t\tif (doesReplayTargetTruncateRequest(replayTarget)) {\n\t\t\tgetReplayTargetStepBoundaryRowIndex(replayTarget)\n\t\t\tassertContextRuntimeStateForStepReplayTarget(replayTarget)\n\t\t}\n\n\t\treturn replayTarget\n\t}\n\n\treturn {\n\t\trequestId: request.id,\n\t\trequestIndex,\n\t\trequest,\n\t\tscopeId,\n\t\tagentSnapshot,\n\t}\n}\n\nfunction getLatestCompleteRequestBoundaryRequest(\n\tmanifest: EvalExportV1,\n\tagentSnapshot: LatestAgentSchemas.PersistedAgentSnapshot,\n): PersistedAgentHydrationRequest {\n\tfor (const request of agentSnapshot.history.toReversed()) {\n\t\tconst endRowIndex = request.crdtSnapshot?.turnEndRowIndex\n\t\tif (isUndefined(endRowIndex)) continue\n\t\tif (endRowIndex < manifest.crdt.baseRowIndex) continue\n\t\tif (endRowIndex > manifest.crdt.baseRowIndex + manifest.crdt.rows.length) continue\n\t\treturn request\n\t}\n\n\tthrow new Error(\"Eval export has no complete request boundary to replay.\")\n}\n\nexport function createPersistedAgentSnapshotFromEvalExport(\n\treplayTarget: ResolvedEvalExportReplayTarget,\n): LatestAgentSchemas.PersistedAgentSnapshot {\n\tconst snapshot = replayTarget.agentSnapshot\n\tconst truncatedHistory = getEvalExportHydrationRequests(replayTarget)\n\tconst isLatestRequest = replayTarget.requestIndex === snapshot.history.length - 1\n\tconst shouldPreserveLatestSnapshotState = isLatestRequest && !doesReplayTargetTruncateRequest(replayTarget)\n\n\treturn {\n\t\t...snapshot,\n\t\tscopeId: replayTarget.scopeId,\n\t\tstate: truncatedHistory.length > 0 ? \"follow-up\" : \"idle\",\n\t\thistory: truncatedHistory,\n\t\tusage: getEvalExportUsageForHydrationRequests(truncatedHistory),\n\t\tpromptQueue: shouldPreserveLatestSnapshotState ? snapshot.promptQueue : undefined,\n\t}\n}\n\nfunction getEvalExportUsageForHydrationRequests(\n\trequests: readonly PersistedAgentHydrationRequest[],\n): LatestAgentSchemas.PersistedAgentSnapshot[\"usage\"] {\n\treturn requests.flatMap(request => (isUndefined(request.usage) ? [] : [request.usage]))\n}\n\nfunction getEvalExportHydrationRequests(\n\treplayTarget: ResolvedEvalExportReplayTarget,\n): readonly PersistedAgentHydrationRequest[] {\n\tconst requests = replayTarget.agentSnapshot.history.slice(0, replayTarget.requestIndex + 1)\n\tconst includedStepCount = replayTarget.includedStepCount\n\tif (includedStepCount === undefined) return requests\n\n\tconst targetRequest = requests[requests.length - 1]\n\tassert(targetRequest, \"Replay target request must exist.\")\n\tassert(\n\t\tincludedStepCount <= targetRequest.steps.length,\n\t\t\"Replay target step exceeds persisted request steps.\",\n\t\treplayTarget.requestId,\n\t\tincludedStepCount,\n\t)\n\tif (includedStepCount === targetRequest.steps.length && includedStepCount > 0) return requests\n\tconst steps =\n\t\tincludedStepCount === 0\n\t\t\t? createInitialRequestReplaySteps(replayTarget)\n\t\t\t: targetRequest.steps.slice(0, includedStepCount)\n\n\treturn [...requests.slice(0, -1), createStepTruncatedHydrationRequest(replayTarget, steps)]\n}\n\nfunction createInitialRequestReplaySteps(\n\treplayTarget: ResolvedEvalExportReplayTarget,\n): readonly PersistedAgentHydrationStep[] {\n\treturn replayTarget.request.steps.length === 0 ? [] : [createInitialRequestRuntimeCheckpointStep(replayTarget)]\n}\n\nfunction createStepTruncatedHydrationRequest(\n\treplayTarget: ResolvedEvalExportReplayTarget,\n\tsteps: readonly PersistedAgentHydrationStep[],\n): PersistedAgentHydrationRequest {\n\tconst request = replayTarget.request\n\tconst truncatedRequest: PersistedAgentHydrationRequest = {\n\t\tid: request.id,\n\t\tparts: request.parts,\n\t\timages: request.images,\n\t\tfiles: request.files,\n\t\tcontextMessages: request.contextMessages,\n\t\tsteps,\n\t\tdone: true,\n\t\tstate: {\n\t\t\tmessages: getEvalExportHydrationMessages(replayTarget),\n\t\t},\n\t\tcrdtSnapshot: {\n\t\t\tturnEndRowIndex: getReplayTargetStepBoundaryRowIndex(replayTarget),\n\t\t},\n\t\tselection: request.selection,\n\t\tscopeId: request.scopeId,\n\t\tmodel: request.model,\n\t\treasoningEffort: request.reasoningEffort,\n\t}\n\n\treturn truncatedRequest\n}\n\nfunction getEvalExportHydrationMessages(\n\treplayTarget: ResolvedEvalExportReplayTarget,\n): PersistedAgentHydrationRequest[\"state\"][\"messages\"] {\n\tconst beforeMessageCount = getReplayTargetBeforeMessageCount(replayTarget)\n\tif (isUndefined(beforeMessageCount)) return []\n\n\tassert(\n\t\tbeforeMessageCount <= replayTarget.request.state.messages.length,\n\t\t\"Requested replay step has a beforeMessageCount beyond the persisted turn messages.\",\n\t\treplayTarget.requestId,\n\t\treplayTarget.includedStepCount,\n\t\tbeforeMessageCount,\n\t)\n\treturn replayTarget.request.state.messages.slice(0, beforeMessageCount)\n}\n\nfunction getReplayTargetBeforeMessageCount(replayTarget: ResolvedEvalExportReplayTarget): number | undefined {\n\tconst includedStepCount = getReplayTargetIncludedStepCount(replayTarget)\n\treturn replayTarget.request.steps[includedStepCount]?.metadata.beforeMessageCount\n}\n\nfunction createInitialRequestRuntimeCheckpointStep(\n\treplayTarget: ResolvedEvalExportReplayTarget,\n): PersistedAgentHydrationStep {\n\tconst request = replayTarget.request\n\tconst firstStepCrdtSnapshot = request.steps[0]?.metadata.crdtSnapshot\n\tassert(firstStepCrdtSnapshot, \"Initial request replay requires first step CRDT metadata.\", request.id)\n\tconst rowIndex = firstStepCrdtSnapshot.beforeRowIndex\n\tconst runtimeState = getContextRuntimeStateBeforeRequest(replayTarget)\n\tassert(rowIndex !== undefined, \"Initial request replay requires first step CRDT row marker.\", request.id)\n\n\tconst step: PersistedAgentHydrationStep = {\n\t\tcontent: [],\n\t\ttoolResults: [],\n\t\tmetadata: {\n\t\t\tcrdtSnapshot: {\n\t\t\t\tbeforeRowIndex: rowIndex,\n\t\t\t\tafterRowIndex: rowIndex,\n\t\t\t\tafterRuntimeState: createPersistedContextRuntimeState(runtimeState),\n\t\t\t},\n\t\t\tbeforeMessageCount: getReplayTargetBeforeMessageCount(replayTarget),\n\t\t},\n\t}\n\treturn step\n}\n\nfunction getContextRuntimeStateBeforeRequest(replayTarget: ResolvedEvalExportReplayTarget): ContextRuntimeState {\n\tfor (let requestIndex = replayTarget.requestIndex - 1; requestIndex >= 0; requestIndex--) {\n\t\tconst request = replayTarget.agentSnapshot.history[requestIndex]\n\t\tif (!request) continue\n\n\t\tfor (let stepIndex = request.steps.length - 1; stepIndex >= 0; stepIndex--) {\n\t\t\tconst runtimeState = request.steps[stepIndex]?.metadata.crdtSnapshot?.afterRuntimeState\n\t\t\tif (runtimeState) return cloneContextRuntimeState(runtimeState)\n\t\t}\n\t}\n\n\treturn createEmptyContextRuntimeState()\n}\n\nfunction createEmptyContextRuntimeState(): ContextRuntimeState {\n\treturn { scriptDataByKey: [] }\n}\n\nfunction createPersistedContextRuntimeState(\n\tstate: ContextRuntimeState,\n): NonNullable<NonNullable<PersistedAgentHydrationStep[\"metadata\"][\"crdtSnapshot\"]>[\"afterRuntimeState\"]> {\n\tconst runtimeState = cloneContextRuntimeState(state)\n\tconst scriptDataByKey: [string, string][] = []\n\tfor (const [key, value] of runtimeState.scriptDataByKey) {\n\t\tscriptDataByKey.push([key, value])\n\t}\n\treturn {\n\t\tscriptDataByKey,\n\t\t...(runtimeState.checklist ? { checklist: runtimeState.checklist } : {}),\n\t}\n}\n\nfunction doesReplayTargetTruncateRequest(replayTarget: ResolvedEvalExportReplayTarget): boolean {\n\tconst includedStepCount = replayTarget.includedStepCount\n\tif (includedStepCount === undefined) return false\n\n\tconst targetRequest = replayTarget.agentSnapshot.history[replayTarget.requestIndex]\n\tassert(targetRequest, \"Replay target request must exist.\")\n\treturn includedStepCount < targetRequest.steps.length || includedStepCount === 0\n}\n\nexport async function loadEvalExportDocumentIntoEngine({\n\tengine,\n\tarchiveSnapshot,\n\treplayTarget,\n\texternalModuleEvaluationMode = \"sandbox\",\n}: {\n\tengine: VekterEngine\n\tarchiveSnapshot: EvalExportArchiveSnapshot\n\treplayTarget: ResolvedEvalExportReplayTarget\n\texternalModuleEvaluationMode?: ExternalModuleEvaluationMode\n}): Promise<void> {\n\tengine.stores.treeStore.mode = \"crdt\"\n\tconst committer = engine.stores.treeStore.crdtTimeline\n\tengine.stores.modulesStore.resetModuleStateAndPermissions(\"readwrite-detached\")\n\tengine.stores.loadedExternalModulesStore.setExternalModuleEvaluationMode(externalModuleEvaluationMode)\n\tloadEvalExportAssetsIntoEngine(engine, archiveSnapshot)\n\n\tconst { base } = getEvalExportCrdtBaseCapture(archiveSnapshot)\n\n\tconst loader = new CrdtDocumentLoader(\n\t\tcommitter.store,\n\t\tundefined,\n\t\tengine.componentLoader,\n\t\tCanvasTreeVersion,\n\t\t\"eval-export://document\",\n\t\t{\n\t\t\tpartialParsing: false,\n\t\t\tloadedData: base,\n\t\t\tactiveNodeId: replayTarget.scopeId,\n\t\t},\n\t)\n\n\t// `loader.start()` awaits `loadAllScopesAsync` which parses every non-active scope from the\n\t// CRDT store and emits \"loadedScope\". The committer is normally driven by RemoteDocument /\n\t// RemoteProject in the live editor; in the eval harness there is no remote, so we wire the\n\t// committer up directly. Without this, every page besides the active one stays shallow on\n\t// `engine.tree`, which breaks anything that walks across pages (cross-page link resolution,\n\t// scroll-target lookups, `engine.tree.get(<node-on-other-page>)`, etc.).\n\tlet didLoadFirstData = false\n\tlet didLoadAllData = false\n\tloader.on(\"loadedFirstData\", tree => {\n\t\tengine.load(tree)\n\t\tcommitter.isPartialLoading = true\n\t\tdidLoadFirstData = true\n\t})\n\tloader.on(\"loadedScope\", scope => {\n\t\tcommitter.loadOneScope(scope, false)\n\t\tengine.newTreeAfterRemoteUpdate(committer.tree)\n\t})\n\tloader.on(\"loadedAllData\", () => {\n\t\tcommitter.loadedAllScopes({ containsLocalEdits: false, hasHierarchyChanges: false })\n\t\tdidLoadAllData = true\n\t})\n\t// `engine.load()` uses the document active node to choose the initial active scope.\n\t// Eval export replays are detached from URL/view-state loading, so seed it from the replay target.\n\tengine.stores.documentSettingsStore.activeNode = { id: replayTarget.scopeId }\n\tawait loader.start()\n\tassert(didLoadFirstData, \"Eval export loader did not emit initial document data.\")\n\tassert(didLoadAllData, \"Eval export loader did not finish loading the document.\")\n\n\tconst rows = [...getRowsForReplayTarget(archiveSnapshot.manifest, replayTarget)]\n\tif (rows.length > 0) {\n\t\tStore.verifyBatches(rows)\n\t\tconst tempStore = new Store({ client: 0, user: \"eval-export\" })\n\t\ttempStore.addSerializableRows(rows)\n\t\tconst patches = mergeAndGetPatches(committer.store, tempStore)\n\t\tif (patches.size > 0) {\n\t\t\tcommitter.handleRemotePatches(patches, 1, {\n\t\t\t\tcontainsLocalEdits: false,\n\t\t\t\thasHierarchyChanges: rows.some(row => row.key === \"parentid\"),\n\t\t\t})\n\t\t\tengine.newTreeAfterRemoteUpdate(committer.tree)\n\t\t}\n\t}\n\n\tselectEvalExportReplayTargetScope(engine, replayTarget)\n}\n\nfunction loadEvalExportAssetsIntoEngine(engine: VekterEngine, archiveSnapshot: EvalExportArchiveSnapshot): void {\n\tconst assets = archiveSnapshot.manifest.assets ?? []\n\tengine.stores.assetStore.assetMap.set(createAssetMapEntries(assets))\n\tfontStore.importCustomFonts(assets, experiments.isOn(\"customFontGrouping\"))\n\tengine.scheduler.changes.addChanges(EngineChange.AssetMap, EngineChange.CustomFontStore)\n}\n\nfunction createAssetMapEntries(assets: readonly AssetWithOwnerTypes[]): Asset[] {\n\tconst entries: Asset[] = []\n\tfor (const asset of assets) {\n\t\tconst { ownerTypes, ...assetWithoutOwnerTypes } = asset\n\t\tfor (const ownerType of ownerTypes) {\n\t\t\tentries.push({ ...assetWithoutOwnerTypes, ownerType })\n\t\t}\n\t}\n\treturn entries\n}\n\nfunction selectEvalExportReplayTargetScope(engine: VekterEngine, replayTarget: ResolvedEvalExportReplayTarget): void {\n\tassert(\n\t\tengine.tree.get(replayTarget.scopeId),\n\t\t\"Eval export replay target scope is missing from the loaded document.\",\n\t\treplayTarget.scopeId,\n\t)\n\tengine.stores.scopeStore.selectScopeByAgent(replayTarget.scopeId)\n}\n\nexport function hydrateEvalExportAgent({\n\tarchiveSnapshot,\n\tagent,\n\treplayTarget,\n}: {\n\tarchiveSnapshot: EvalExportArchiveSnapshot\n\tagent: Agent\n\treplayTarget: ResolvedEvalExportReplayTarget\n}): Agent {\n\tconst manifest = archiveSnapshot.manifest\n\tconst historyEntries = getEvalExportHydrationRequests(replayTarget).entries()\n\tfor (const [index, exportedRequest] of historyEntries) {\n\t\tconst hydratedRequest = agent.chatMessages[index]\n\t\tif (!hydratedRequest) continue\n\t\tconst turnEndRowIndex =\n\t\t\texportedRequest.id === replayTarget.requestId\n\t\t\t\t? getReplayTargetRowIndex(manifest, replayTarget)\n\t\t\t\t: exportedRequest.crdtSnapshot?.turnEndRowIndex\n\t\tif (turnEndRowIndex !== undefined) {\n\t\t\thydratedRequest.crdtSnapshot = {\n\t\t\t\tturnEndRowIndex,\n\t\t\t}\n\t\t}\n\t\tconst isTruncatedReplayTarget =\n\t\t\texportedRequest.id === replayTarget.requestId && doesReplayTargetTruncateRequest(replayTarget)\n\t\tif (isTruncatedReplayTarget) hydratedRequest.summary = undefined\n\t}\n\tagent.hydrateEvalCrdtBaseCapture(getEvalExportCrdtBaseCapture(archiveSnapshot))\n\treturn agent\n}\n\nfunction getRowsForReplayTarget(\n\tmanifest: EvalExportV1,\n\treplayTarget: ResolvedEvalExportReplayTarget,\n): EvalExportV1[\"crdt\"][\"rows\"] {\n\tconst endRowIndex = getReplayTargetRowIndex(manifest, replayTarget)\n\tassert(\n\t\tendRowIndex >= manifest.crdt.baseRowIndex,\n\t\t\"Requested replay turn predates the exported CRDT base snapshot.\",\n\t\treplayTarget.requestId,\n\t)\n\tassert(\n\t\tendRowIndex <= manifest.crdt.baseRowIndex + manifest.crdt.rows.length,\n\t\t\"Requested replay turn is beyond the exported CRDT rows.\",\n\t\treplayTarget.requestId,\n\t)\n\treturn manifest.crdt.rows.slice(0, endRowIndex - manifest.crdt.baseRowIndex)\n}\n\nfunction getReplayTargetRowIndex(manifest: EvalExportV1, replayTarget: ResolvedEvalExportReplayTarget): number {\n\tif (isUndefined(replayTarget.includedStepCount) || !doesReplayTargetTruncateRequest(replayTarget)) {\n\t\tconst endRowIndex = replayTarget.request.crdtSnapshot?.turnEndRowIndex\n\t\tassert(endRowIndex !== undefined, \"Requested replay turn is missing an endRowIndex.\", replayTarget.requestId)\n\t\treturn endRowIndex\n\t}\n\n\tconst rowIndex = getReplayTargetStepBoundaryRowIndex(replayTarget)\n\tassert(\n\t\trowIndex >= manifest.crdt.baseRowIndex,\n\t\t\"Requested replay step predates the exported CRDT base snapshot.\",\n\t\treplayTarget.requestId,\n\t\treplayTarget.includedStepCount,\n\t)\n\treturn rowIndex\n}\n\nfunction getReplayTargetStepBoundaryRowIndex(replayTarget: ResolvedEvalExportReplayTarget): number {\n\tconst includedStepCount = getReplayTargetIncludedStepCount(replayTarget)\n\tif (includedStepCount === 0 && replayTarget.request.steps.length === 0) {\n\t\tconst rowIndex = replayTarget.request.crdtSnapshot?.turnEndRowIndex\n\t\tassert(\n\t\t\trowIndex !== undefined,\n\t\t\t\"Initial replay for a zero-step request requires a request CRDT row marker.\",\n\t\t\treplayTarget.requestId,\n\t\t)\n\t\treturn rowIndex\n\t}\n\n\tconst step = getReplayTargetBoundaryStep(replayTarget)\n\tconst crdtSnapshot = step.metadata.crdtSnapshot\n\tconst rowIndex = includedStepCount === 0 ? crdtSnapshot?.beforeRowIndex : crdtSnapshot?.afterRowIndex\n\tassert(\n\t\trowIndex !== undefined,\n\t\t`Requested step-boundary replay is missing its CRDT row marker for ${includedStepCount} included steps.`,\n\t\treplayTarget.requestId,\n\t\tincludedStepCount,\n\t)\n\treturn rowIndex\n}\n\nfunction getReplayTargetRuntimeState(replayTarget: ResolvedEvalExportReplayTarget) {\n\tconst includedStepCount = getReplayTargetIncludedStepCount(replayTarget)\n\tif (includedStepCount === 0) return getContextRuntimeStateBeforeRequest(replayTarget)\n\n\tconst step = getReplayTargetBoundaryStep(replayTarget)\n\treturn step.metadata.crdtSnapshot?.afterRuntimeState\n}\n\nfunction getReplayTargetBoundaryStep(replayTarget: ResolvedEvalExportReplayTarget): PersistedAgentHydrationStep {\n\tconst includedStepCount = getReplayTargetIncludedStepCount(replayTarget)\n\tconst stepIndex = includedStepCount === 0 ? 0 : includedStepCount - 1\n\tconst step = replayTarget.request.steps[stepIndex]\n\tassert(step, \"Requested replay step was not found in the eval export.\", replayTarget.requestId, stepIndex)\n\treturn step\n}\n\nfunction getReplayTargetIncludedStepCount(replayTarget: ResolvedEvalExportReplayTarget): number {\n\tconst includedStepCount = replayTarget.includedStepCount\n\tassert(!isUndefined(includedStepCount), \"Step replay target must include an included step count.\")\n\treturn includedStepCount\n}\n"],
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