WASHINGTON — NASA and Roscosmos have agreed to continue exchanging seats between Soyuz and Crew Dragon spacecraft, but that agreement does not yet extend to Starliner. NASA officials did not immediately confirm that report or provide a readout of Isaacman’s meeting with Bakanov. During an Aug. 3 briefing about the upcoming Crew-13 mission to the ISS, whose crew again includes a Russian cosmonaut, NASA officials confirmed that they have extended the seat barter agreement but provided few details about the extension. Weigel, though, said the agreement does not, for now, include Boeing’s Starliner, which NASA has yet to certify for long-duration crewed ISS missions. NASA has been working with Boeing to address propulsion system issues seen on the vehicle’s last flight, the Crew Flight Test mission two years ago.