Try this with E90S90

[GDennis]

screeps-packrat/src/packrat.ts

Line 259 in 6ad698b

 const num = (quadrant << 12 | (x << 6) | y) + 65; 

6 Bits are not enough. Try E90S90. 6 Bits is just enough for 0 to 63.

I suggest using __parsed of RoomPosition. It already encodes world xy and room xy with 8 bits each including the quadrant. 8 Bit is enough for -128 to 127, it includes all rooms of shard0, you can't strip any bit away without information loss.
I suggest to use __parsed >>> 16 directly to encode a roomName.

[NekoKetsu]

#5