Index: lib/Comms/Comms.pro
===================================================================
diff -u -rcaca75be9a284ac5f98c078ec47c2e826ac5e980 -refc0e8ccb0ee99f25834eb5a19dee1cf2e50c532
--- lib/Comms/Comms.pro	(.../Comms.pro)	(revision caca75be9a284ac5f98c078ec47c2e826ac5e980)
+++ lib/Comms/Comms.pro	(.../Comms.pro)	(revision efc0e8ccb0ee99f25834eb5a19dee1cf2e50c532)
@@ -21,6 +21,7 @@
     include/main.h \
     include/MessageBuilder.h \
     include/MessageDispatcher.h \
+    include/MessageSpool.h \
     include/types.h
 
 SOURCES = \
@@ -33,10 +34,15 @@
     src/FrameInterface.cpp \
     src/MessageBuilder.cpp \
     src/MessageDispatcher.cpp \
+    src/MessageSpool.cpp \
     src/types.cpp
 
 INCLUDEPATH += $$PWD/include
 
+# MessageSpool uses the SQLite C API directly (see docs/SDD/AgentMigrationPlan.md
+# section 5.5). Requires libsqlite3-dev at build time.
+LIBS += -lsqlite3
+
 isEmpty(PREFIX): PREFIX = $$PWD/../../install
 
 target.path             = $$PREFIX/lib