Context Window Management

import { feature } from 'bun:bundle'

import type { UUID } from 'crypto'

import uniqBy from 'lodash-es/uniqBy.js'

/* eslint-disable @typescript-eslint/no-require-imports */

const sessionTranscriptModule = feature('KAIROS')

  ? (require('../sessionTranscript/sessionTranscript.js') as typeof import('../sessionTranscript/sessionTranscript.js'))

  : null

import { APIUserAbortError } from '@anthropic-ai/sdk'

import { markPostCompaction } from 'src/bootstrap/state.js'

import { getInvokedSkillsForAgent } from '../../bootstrap/state.js'

import type { QuerySource } from '../../constants/querySource.js'

import type { CanUseToolFn } from '../../hooks/useCanUseTool.js'

import type { Tool, ToolUseContext } from '../../Tool.js'

import type { LocalAgentTaskState } from '../../tasks/LocalAgentTask/LocalAgentTask.js'

import { FileReadTool } from '../../tools/FileReadTool/FileReadTool.js'

import {

  FILE_READ_TOOL_NAME,

  FILE_UNCHANGED_STUB,

} from '../../tools/FileReadTool/prompt.js'

import { ToolSearchTool } from '../../tools/ToolSearchTool/ToolSearchTool.js'

import type { AgentId } from '../../types/ids.js'

import type {

  AssistantMessage,

  AttachmentMessage,

  HookResultMessage,

  Message,

  PartialCompactDirection,

  SystemCompactBoundaryMessage,

  SystemMessage,

  UserMessage,

} from '../../types/message.js'

import {

  createAttachmentMessage,

  generateFileAttachment,

  getAgentListingDeltaAttachment,

  getDeferredToolsDeltaAttachment,

  getMcpInstructionsDeltaAttachment,

} from '../../utils/attachments.js'

import { getMemoryPath } from '../../utils/config.js'

import { COMPACT_MAX_OUTPUT_TOKENS } from '../../utils/context.js'

import {

  analyzeContext,

  tokenStatsToStatsigMetrics,

} from '../../utils/contextAnalysis.js'

import { logForDebugging } from '../../utils/debug.js'

import { hasExactErrorMessage } from '../../utils/errors.js'

import { cacheToObject } from '../../utils/fileStateCache.js'

import {

  type CacheSafeParams,

  runForkedAgent,

} from '../../utils/forkedAgent.js'

import {

  executePostCompactHooks,

  executePreCompactHooks,

} from '../../utils/hooks.js'

import { logError } from '../../utils/log.js'

import { MEMORY_TYPE_VALUES } from '../../utils/memory/types.js'

import {

  createCompactBoundaryMessage,

  createUserMessage,

  getAssistantMessageText,

  getLastAssistantMessage,

  getMessagesAfterCompactBoundary,

  isCompactBoundaryMessage,

  normalizeMessagesForAPI,

} from '../../utils/messages.js'

import { expandPath } from '../../utils/path.js'

import { getPlan, getPlanFilePath } from '../../utils/plans.js'