The denominator artifact's site coordinates assume a backslash-continuation
helper call reports at its FIRST physical line. That convention was measured
on a developer bash (5.3.x, Fedora); CI runs the bash baked into ci-base
(node:24-alpine), which rebuilds only on push-to-main or tag — so the CI bash
version floats silently between rebuilds, and an artifact validated only
against a developer bash is unverified in the place the gate actually runs.
wake_assert_init now runs a probe under the SAME bash binary executing the
suite (subshell + continuation, the real call shape) and aborts loudly if the
convention does not hold, instead of letting coordinates skew by one line
under everyone. Microtest C10 proves the pin's abort arm fires, via a
test-only WAKE_ASSERT_PIN_BASH interpreter override ($BASH itself cannot be
spoofed — bash resets it at startup): a pin whose failure arm was never seen
firing is an undertaking, not a control.
Prompted by mos-dt's CI-bash-float finding (prereg addendum 4, ddea1bc7b).
Written-by: pepper (sb-it-1-dt)
Co-Authored-By: Claude Fable 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01NsKce8iZuSuRnu3gVMCBKB
