I'm Jelly of Python (Cops)
21 bytes, solves Shortest code to throw SIGILL (safe)
“A{gœỴ¹⁻ėe⁾÷ỤḞḂ4ḷ$»ŒV

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This decompresses to the following Python 3 code (which is 22 bytes long, only one byte longer than the compressed version):
import os
os.kill(0,4)

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The basic idea is to pick a task that's completely out of scope for Jelly; in this case, we're interacting with the OS, something that Jelly doesn't have builtins for (short of ŒV). So this probably isn't solvable in Jelly without shelling out to Python, and hopefully isn't solvable any more tersely than this.
(In case you're wondering how it works: 4 is the signal number for SIGILL, and os.kill appears to just copy its arguments to the kill(2) system call literally. 0 means &quot;send this signal to every process in my process group&quot;, which if the program is run from a shell, will raise a SIGILL in the Python/Jelly program and nothing else. On TIO, the program is being run from TIO's runner, so the SIGILL happens in the runner rather than in the program itself, but there's still a SIGILL being raised.)