The fold exported scanDocument for the string tests, and importing it also ran
the guard. check-behaviour imports that module, so a figure defect called
process.exit(1) inside check-behaviour: it reported check-figures' failure under
its own name having run zero of its 108 tests.
The build went red, which is why this was survivable, but it went red in the
wrong place and every behavioural test was silently not running while appearing
to. A guard that stops another guard from running, and cannot say so, is the
worst version of the fault this file exists to catch.
Body now sits behind import.meta.main, the idiom step5-split.mjs already uses.
Importing yields the four readers and nothing else. Tested by spawning a fresh
process, because the property is "importing has no effect" and a source
assertion would pass on a file that grew a second side effect elsewhere.
Reverting the check fails exactly one test. With a defect planted,
check-behaviour runs 108 green and check-figures fails in its own slot.
Mine, introduced by R-307. R-309.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
