The #43 sweep (test/cli.sh:705) matched the literal `-rsp` spelling and
scanned commands/ only. #68 was a plain `read -r reply` in bin/rig, so it
missed on BOTH axes — the spelling and the path — and the bug survived
until a drill hit it.
The class is the shape, not the flags: any `read` run as a plain statement
under `set -euo pipefail` kills the shell at EOF, before the `case` that
would have printed the abort. The failure is silent and exits 1, which is
also what a normal refusal exits, so an exit-code assertion passes against
it.
The new sweep anchors `read` at the start of a statement across bin/ and
commands/, whatever its flags or arity, and subtracts only the two shapes
that are safe by construction: a `||` guard (the cure itself) and a `<<<`
here-string (which cannot return non-zero). `while`/`if ! ` heads need no
subtraction — the anchor already excludes them.
Guard against reintroduction, not a live fix: the tree is clean once #68's
one-token fix lands. Mutation-verified — a bare `read -r foo` planted in
bin/rig gives 404 passed, 1 failed, and the old #43 sweep stays green on
the same tree, which is precisely the gap being closed.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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