Build pluggable transport binaries for Android
We would focus on obfs4 as it should still work in countries like Iran or China (if the bridge host itself is not blocked via TCP). Also, obfs2 and 3 are obsolete, and scramblesuit has no advantages over obfs4 that we know of.
The first task is to work out whether we need a standalone obfs4 executable or a go library. If we use the library, do we also need the dispatcher so tor can control the transport? Then we'll know whether our upstream is yawning's obfs4 or the shapeshifter-transports library.
There's also Guardian Project's Android Pluggable Transports and OpenPriv's Android Go Mobile Builder that might be relevant.
The extra artifact that gets added to Briar should be reproducible: How to Reproduce Go binaries byte-by-byte