Function matchSessionMode

src/coordinator/coordinatorMode.ts:49–78

(
  sessionMode: 'coordinator' | 'normal' | undefined,
)

 * the mode was switched, or undefined if no switch was needed.
 */
export function matchSessionMode(
  sessionMode: 'coordinator' | 'normal' | undefined,
): string | undefined {
  // No stored mode (old session before mode tracking) — do nothing
  if (!sessionMode) {
    return undefined
  }

  const currentIsCoordinator = isCoordinatorMode()
  const sessionIsCoordinator = sessionMode === 'coordinator'

  if (currentIsCoordinator === sessionIsCoordinator) {
    return undefined
  }

  // Flip the env var — isCoordinatorMode() reads it live, no caching
  if (sessionIsCoordinator) {
    process.env.CLAUDE_CODE_COORDINATOR_MODE = '1'
  } else {
    delete process.env.CLAUDE_CODE_COORDINATOR_MODE
  }

  logEvent('tengu_coordinator_mode_switched', {
    to: sessionMode as unknown as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS,
  })

  return sessionIsCoordinator
    ? 'Entered coordinator mode to match resumed session.'
    : 'Exited coordinator mode to match resumed session.'
}

export function getCoordinatorUserContext(
  mcpClients: ReadonlyArray<{ name: string }>,