bun run appends arguments to the command string, so a script ending in an
inline # comment swallows them. Proven side by side:
"node argtest.mjs" bun run _t1 --self-test -> ["--self-test"]
"node argtest.mjs # a comment" bun run _t2 --self-test -> []
No error, no warning: the script runs in its default mode and exits 0.
Four scripts advertised a flag that could never arrive, and two of them are
--self-test. A --self-test IS the proof that a gate can fail, so running
check:facet-cascade --self-test printed the ordinary PASS and exited 0 --
which reads as "the negative test passed" when the negative test never ran.
The gate itself was fine: invoking node directly reverted the cascade and
failed 13 assertions correctly, including the real symptom (switching to
another language family leaves the map empty because the orphan still
filters). Only the invocation was broken, so the mechanism that certifies a
gate can fail was a gate certifying itself.
Each flag now gets a dedicated entry that hardcodes it, which also makes the
mode discoverable in bun run output instead of documented only in prose
nobody greps.
check:script-flags fails any script whose comment advertises a flag the
command cannot receive. Negative-tested: adding such a comment back fails by
name with exit 1.
