E06-S06 routes deletion through a fat reference to obj_delete behind the heap's
always-on validation, so a stale value is refused with IF_ERR_FREED instead of
reading a freed destructor, and adds the objects.n8 parser fixture.

E07-S02 shares one launcher implementation that locks the writable image and
waits for the emulator exit and image flush, with x64sc for the editor and x128
for the compiler.

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Number interface methods in source order and check each class against every
implemented interface, reporting missing, private, mismatched, conflicting,
and non-interface implementations at the class declaration.

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Compute sizes and offsets after the declaration pass so forward references
have a kind, report E096 for instances over 65535 bytes, and record the
layout in the parser harness so declaration order is fixture-checked.

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types.s gives every expression a type and applies the spec 3.4/8
conversions, operator table, constant folding and diagnostic spellings.
parser.s records implements lists and init rows in pass 1, carries types
through member chains, groups, calls and indexing in pass 2, and checks
assignments, arguments, returns, conditions, for, print, delete and member
access. A method that declares a result must end in return; a missing one
is E150 at end, and a program return value is E151.

Three older parser fixtures gain true diagnostics. The lexer's host
reference formatter now spells bytes such as {0D} correctly, and the demo
tolerates a missing ERR file.

Verified in x128: 37 parser fixtures, 10 lexer fixtures, the 67-entry
diagnostic catalog, and the Vim-to-N8CHECK demo (good.n8 clean, bad.n8's
four diagnostics).

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