- drop shareScope.required=["linkShare"] from the result schema: the
production response omits linkShare unless link sharing is configured;
document the conditional presence in the schema description, tests,
and both skill references
- spell out policy value tiers in skill docs (READER_AND_ABOVE /
DOWNLOADER_AND_ABOVE / EDITOR_AND_ABOVE / MANAGER_AND_ABOVE) so the
shorthand no longer diverges from the schema enums
半圭
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