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The marker's name is a literal in four places, and the note says so

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Joseph Ferano 2026-09-14 07:24:54 +07:00
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HANDOFF-x86-abi-marker.md
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@ -171,3 +171,9 @@ through the redirect and stays empty until the end; that is not a hang.
now, not easier: the marker refuses the pair before any of the four `step` functions runs, so anyone who
wants the answer has to build the crossed module with the marker suppressed on purpose.
- Items 1, 2 and 5 of `HANDOFF-x86-redef.md`, untouched.
- A seam worth knowing about before anyone renames a marker. The two strings live in OCaml — `X86.abi_marker`
and `Emit.abi_marker` — and the two `abi_mismatch` functions match the same literals in C, with nothing
linking the four. Rename one and the refusal still fires, because the symbol is still missing; it just stops
being a sentence and reverts to the loader's bare "undefined symbol", which is the failure this lane was
about. The crossed tests would catch it — they assert on the marker's name — so the seam is guarded, but it
is a seam.