A library color sync wrote a copy's fills through update-shapes, and a
library typography sync wrote a copy text's content with a plain :set,
so both marked the copy as overridden (:fill-group, or :content-group
with :text-content-attribute). A later edit of that fill or text style
in the main then never reached the copy. Both syncs are derived writes:
they now write with ignore-touched.
The typography sync also merged the whole typography into each text node
that uses it, so its :modified-at (and :path) ended in the content of
the main and of every copy. It now writes only the text styles of the
typography.
Benchmark (lower quantile, ms; baseline / now / ratio):
deepest-edit-through-three-levels 35.2 / 34.7 / 0.98
edit-through-a-chain-of-dependents 68.9 / 67.6 / 0.98
library-update-into-copies 83.1 / 76.0 / 0.91
main-edit-into-10-copies 1.8 / 1.5 / 0.86
main-edit-into-100-copies 15.4 / 15.2 / 0.99
main-edit-into-1000-copies 153.1 / 157.1 / 1.03
variant-switch-into-copies 32.1 / 27.0 / 0.84
AI-assisted-by: claude-opus-5-5
7ac68a551b