Function initBridgeCore

src/bridge/replBridge.ts:260–1839

(
  params: BridgeCoreParams,
)

 * Returns null on registration or session-creation failure.
 */
export async function initBridgeCore(
  params: BridgeCoreParams,
): Promise<BridgeCoreHandle | null> {
  const {
    dir,
    machineName,
    branch,
    gitRepoUrl,
    title,
    baseUrl,
    sessionIngressUrl,
    workerType,
    getAccessToken,
    createSession,
    archiveSession,
    getCurrentTitle = () => title,
    toSDKMessages = () => {
      throw new Error(
        'BridgeCoreParams.toSDKMessages not provided. Pass it if you use writeMessages() or initialMessages — daemon callers that only use writeSdkMessages() never hit this path.',
      )
    },
    onAuth401,
    getPollIntervalConfig = () => DEFAULT_POLL_CONFIG,
    initialHistoryCap = 200,
    initialMessages,
    previouslyFlushedUUIDs,
    onInboundMessage,
    onPermissionResponse,
    onInterrupt,
    onSetModel,
    onSetMaxThinkingTokens,
    onSetPermissionMode,
    onStateChange,
    onUserMessage,
    perpetual,
    initialSSESequenceNum = 0,
  } = params

  const seq = ++initSequence

  // bridgePointer import hoisted: perpetual mode reads it before register;
  // non-perpetual writes it after session create; both use clear at teardown.
  const { writeBridgePointer, clearBridgePointer, readBridgePointer } =
    await import('./bridgePointer.js')

  // Perpetual mode: read the crash-recovery pointer and treat it as prior
  // state. The pointer is written unconditionally after session create
  // (crash-recovery for all sessions); perpetual mode just skips the
  // teardown clear so it survives clean exits too. Only reuse 'repl'
  // pointers — a crashed standalone bridge (`claude remote-control`)
  // writes source:'standalone' with a different workerType.
  const rawPrior = perpetual ? await readBridgePointer(dir) : null
  const prior = rawPrior?.source === 'repl' ? rawPrior : null

  logForDebugging(
    `[bridge:repl] initBridgeCore #${seq} starting (initialMessages=${initialMessages?.length ?? 0}${prior ? ` perpetual prior=env:${prior.environmentId}` : ''})`,
  )