The snapshot harness read ODYSSEUS_TEST_STATIC_ORIGIN into a module constant.
That env var is published by the session static-server fixture, which runs
after collection has already imported the module, so the constant always held
the 7011 fallback and the capture connected to a port nothing was listening on:
route.fetch: connect ECONNREFUSED 127.0.0.1:7011
Neither branch is wrong on its own. The harness was written while the fixture
still bound a fixed 7011, and the ephemeral-port change removed that port. The
two only disagree once they are in the same tree, which is what this integration
branch is for.
With this, the baseline recorded before the stylesheet split is reproduced
exactly after it, so the split is confirmed to preserve computed styles rather
than only argued to.
static/style.css is 51,425 lines in one file. Hundreds of selectors are
declared more than once and !important is used throughout, so the rendered
result is a function of source order. Extracting a block into its own file
changes that order, and nothing in the suite would notice - which makes a
51k-line split unfalsifiable and "looks fine to me" the only available
evidence.
This moves no CSS. It captures getComputedStyle over a fixed inventory of
676 elements across three pages, four viewports, both themes and the three
density modes - 16,224 element snapshots - hashes them, and compares against
tests/css_snapshot/baseline.json. A capture takes about 21 seconds.
The bench page synthesises one element per selector from an evidence-driven
list: every selector declared more than once in style.css that can be
expressed as a static compound chain, plus a curated set per feature area.
Redeclared selectors are the ones a reorder can flip. The bench loads
whatever stylesheets index.html ships, so it keeps measuring the real set
once the file is split. tests/test_css_computed_style_snapshot.py also carries
a self-test that swaps two conflicting .attach-strip declarations and asserts
the digest moves, so the harness cannot silently stop watching.
The second half is the asset-manifest check specs/frontend.md asks for,
scoped to stylesheets: every stylesheet referenced by shipped HTML and by the
sw.js precache exists, and index.html and sw.js agree on the ?v= string. They
hardcode it independently today, so a split that updates one and not the
other ships an offline cache nobody notices until a plane.
Alexandre Teixeira