Surfaced while scoping an empirical test of Decision 6 (.ailx as the
AI authoring projection). The cross-model test depends on a structural
.ail.json <-> .ailx bijection being established and prominently anchored
in DESIGN.md first; otherwise measured form-preference is contaminated
by expressive-power gaps rather than authoring ergonomics. P2 entry
carries the smoke-test evidence and full IONOS-endpoint addressing
notes so the test can be picked up without redoing the connection work.
Brummel
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