builtin_interfaces is used at run time in 13 crates.

Depender (with downloads and own rev deps) builtin_interfaces version
8 std_msgs ^1.2.1
statistics_msgs ^1.2.1
stereo_msgs ^1.2.1
rosgraph_msgs ^1.2.1
2 sensor_msgs ^1.2.1
action_msgs ^1.2.1
diagnostic_msgs ^4.2.3
6 geometry_msgs ^1.2.1
lanelet_msgs ^1.2.1
nav_msgs ^1.2.1
rcl_interfaces ^1.2.1
visualization_msgs ^1.2.1