iface_slot reads the declaration slot assign_slots recorded, so a call site
emits an offset the class table actually has and refuses a method the interface
does not declare. The x128 fixture proves one call site reaching two classes,
one object reaching two interface tables, a nested call with a one-byte result,
and byte/word arguments returning a word with the frame stack restored, while
self stays the underlying object.

Generated with Codebuff
Co-Authored-By: Codebuff <noreply@codebuff.com>

it_find selects the table a class emitted for an interface, refusing a pair the
class does not implement, and if_assign, if_arg_push, if_elem_store, and
if_elem_load give assignment, argument passing, field, and array storage one
API that keeps all four value bytes. Two x128 fixtures prove the class and null
conversions, verbatim copies, array stride, argument layout, and the result
area, while the semantic suite still rejects an invalid conversion.

Generated with Codebuff
Co-Authored-By: Codebuff <noreply@codebuff.com>

Freeze the four-byte fat reference, canonical null, slot/table layout,
and the IF_RESULT return area so interface dispatch and table emission can
build on one documented contract.

Generated with Codebuff
Co-Authored-By: Codebuff <noreply@codebuff.com>

Generated programs now have control-flow emission, text and fault output, a
free-list heap, class descriptors, and object construction/deletion. Each
story lands with an x128 fixture and verifier so the runtime stays proven
before the parser drives code generation.

🤖 Generated with Codebuff
Co-Authored-By: Codebuff <noreply@codebuff.com>