Can't save AppleScript file when created by touch
It doesn't work with .scpt files but it does work with .applescript files.

If you save an empty script as .scpt in AppleScript Editor, it looks like this:

hexdump -C Desktop/Untitled.scpt
00000000  46 61 73 64 55 41 53 20  31 2e 31 30 31 2e 31 30  |FasdUAS 1.101.10|
00000010  0e 00 00 00 04 0f ff ff  00 01 00 02 00 03 01 ff  |................|
00000020  ff 00 00 0d 00 01 00 03  6c 00 02 00 00 00 04 00  |........l.......|
00000030  04 ff fe ff fd 0d 00 04  00 03 52 00 00 00 00 00  |..........R.....|
00000040  04 ff fc 00 05 ff fb 0a  ff fc 00 18 2e 61 73 63  |.............asc|
00000050  72 65 72 72 20 2a 2a 2a  2a 00 00 00 00 00 00 90  |rerr ****.......|
00000060  00 2a 2a 2a 2a 0d 00 05  00 01 6d 00 00 00 02 00  |.****.....m.....|
00000070  03 00 06 0e 00 06 00 01  b1 00 07 11 00 07 00 74  |...............t|
00000080  00 54 00 68 00 69 00 73  00 20 00 73 00 63 00 72  |.T.h.i.s. .s.c.r|
00000090  00 69 00 70 00 74 00 20  00 63 00 6f 00 6e 00 74  |.i.p.t. .c.o.n.t|
000000a0  00 61 00 69 00 6e 00 73  00 20 00 75 00 6e 00 63  |.a.i.n.s. .u.n.c|
000000b0  00 6f 00 6d 00 70 00 69  00 6c 00 65 00 64 00 20  |.o.m.p.i.l.e.d. |
000000c0  00 63 00 68 00 61 00 6e  00 67 00 65 00 73 00 20  |.c.h.a.n.g.e.s. |
000000d0  00 61 00 6e 00 64 00 20  00 63 00 61 00 6e 00 6e  |.a.n.d. .c.a.n.n|
000000e0  00 6f 00 74 00 20 00 62  00 65 00 20 00 72 00 75  |.o.t. .b.e. .r.u|
000000f0  00 6e 00 2e 02 ff fb 00  00 01 ff fe 00 00 01 ff  |.n..............|
00000100  fd 00 00 0e 00 02 00 00  0f 10 00 03 00 03 ff fa  |................|
00000110  00 08 00 09 01 ff fa 00  00 10 00 08 00 01 ff f9  |................|
00000120  0a ff f9 00 18 2e 61 65  76 74 6f 61 70 70 6e 75  |......aevtoappnu|
00000130  6c 6c 00 00 80 00 00 00  90 00 2a 2a 2a 2a 0e 00  |ll........****..|
00000140  09 00 07 10 ff f8 00 0a  ff f7 ff f6 00 0b 00 0c  |................|
00000150  ff f5 0a ff f8 00 18 2e  61 65 76 74 6f 61 70 70  |........aevtoapp|
00000160  6e 75 6c 6c 00 00 80 00  00 00 90 00 2a 2a 2a 2a  |null........****|
00000170  0d 00 0a 00 01 6b 00 00  00 00 00 04 00 0d 02 00  |.....k..........|
00000180  0d 00 02 00 01 ff f4 02  ff f4 00 00 01 ff f7 00  |................|
00000190  00 02 ff f6 00 00 10 00  0b 00 00 10 00 0c 00 01  |................|
000001a0  00 06 11 ff f5 00 05 29  6a e0 15 0f 61 73 63 72  |.......)j...ascr|
000001b0  00 01 00 0c fa de de ad                           |........|
000001b8


You can create a new .scpt file with osacompile:

osacompile -e \"\" -o new.scpt