The guard tested whether the command string contained `tea` between
whitespace. In a repository whose subject is the CLI, that blocked prose:
an issue title, a commit message quoting a raw call, `grep -rn " tea "`
and `echo tea`. The block message told the operator to add --login to
git commit, which cannot be done — the only way past was to reword the
sentence.
The command is now tokenized (heredoc bodies dropped, line continuations
folded, backticks and newlines treated as boundaries) and only words in
command position count: the first word, and the first after a shell
operator, past VAR=value assignments and prefix words. Quoting is what
saves the prose — a title is one token, and a token is never a command.
Every invocation in the line is checked and rewritten, not just the
first: a half-rewritten line left the second call with an unset variable
and no login. The whitelist is now per-invocation too, so quoting
"tea logins list" beside a real call no longer launders it.
An untokenizable line (unbalanced quotes) falls back to the old
substring test, which over-matches and therefore blocks.
Closes#29
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
naudachu
e330a11e8f