Iter 0 of the form-a-default-authoring milestone. One file
rendered (examples/prelude.ail.json -> examples/prelude.ail via
`ail render`), zero source-code edits, zero test-infra changes.
The migration mechanism is validated on the hardest single file
in the corpus (prelude exercises every language feature: classes,
superclasses, polymorphic free fns, IO effects, ctor patterns,
loader auto-injection). The two auto-discovering roundtrip tests
in round_trip.rs pick up the new .ail via read_dir without test
edits; both must pass for the iter to close.
Task 1: render + verify both roundtrip tests green + workspace
sanity check (5 steps).
Task 2: per-iter journal + INDEX append (2 steps).
prelude.ail.json retained per spec §A2 — this is the singular
dual-form iter; iter 1 deletes it with the bulk test-infra
refactor.
Brummel
4c2a3c5d08