I just installed AppCode 2016.3 EAP (details below) and got a request from /Applications/AppCode\ 2016.3\ EAP.app/Contents/bin/prebuild to access by id_rsa. Therefor:
What is prebuild and why does it want access to my id_rsa?
Build #OC-163.5644.16, built on October 6, 2016
JRE: 1.8.0_112-release-b408 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o