Did you know that Claude Code ships a copy of ugrep built into the binary, and distinguishes based on argv[0]?
% bash -c 'exec -a ugrep claude --version'
ugrep 7.8.4 aarch64-apple-macosx neon/AArch64; -P:pcre2jit; -z:zlib,bzip2,zstd,brotli,7z,tar/pax/cpio/zip
License: BSD-3-Clause; ugrep user manual: <https://ugrep.com