https://www.darpa.mil/research/programs/demonstration-rocket-for-agile-cislunar-operations
Authors. DARPA
Venue. programme page — now marked “This program is now complete” (the agency's own status record)
How the Institute flags it
established 4 times frontier 1 time
This source carries more than one flag across the corpus. That is not an inconsistency to resolve: the same work can be established evidence for one claim and frontier evidence for another, and the flag belongs to the use rather than to the source.