Redacted excerpt; full evidence withheld.

$ cd <guest-path> && pwd && ls -la && id -u && python3 --version && cat README.md 2>/dev/null | head -c 6000
exit: 0
xpansion ratio;
- a DEFLATE ratio beyond the format's theoretical maximum (~1032:1), which
  implies overlapping entries or a lying directory;
- multiple members sharing one local header, or overlapping data ranges — the
  classic **non-recursive** (quine) zip bomb;
- sparse TAR members whose logical size is terabytes while the archive is tiny;
- an absurd number of members (inode/time exhaustion);
- an archive inside an archive, recursively, with a bomb at the bottom.

That is what `zipcheck` automates. See
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