Codex round-1 review found three fail-open paths in the new gate:
- Unhandled export forms passed silently. checkDecl now fails CLOSED on
unrecognized exported statement kinds, 'export =' is refused outright,
'export import X = N.member' is an explicit documented skip (alias;
definition site owns the doc), and ambient 'declare namespace' bodies
recurse with implicit export semantics.
- Function-like exports escaped the function contract: non-identifier
default exports and consts with INLINE function-type annotations now
get full @param/@returns checks (the named-type waiver stays for
reference annotations only).
- The heritage exemption was name-only: it no longer exempts a public
override of a protected-only base member, and parameters the base
never names keep their @param duty (underscore-prefixed renames of a
base parameter count as the same parameter).
Eight new negative-path tests pin the closed gaps; RFC and module doc
updated to the refined contract.