DAR ES SALAAM, July 17 -- The Somali flag is once again flying permanently in Dar es Salaams Msasani Peninsula, and the new energy inside the refurbished embassy compound is impossible to miss.

Staff offices that had stood dormant for decades now host round-the-clock working groups, most of them charting how nine fresh bilateral agreements with Tanzania will move from ink to impact over the next eighteen months.

“Diplomacy must translate into real benefits for our people,” Somalias Ambassador, Ilyas Ali Hassan says, gesturing toward a wallsized planning chart that maps each accord against specific deadlines. “That is how we prove Somalia is back in business.” The resurgence became public last December, when Tanza...