Pre-landing review (5 specialists) found one critical: the ratchet test runs
in the curated Windows lane, where path.relative yields backslash skill names
that miss the test/ filter and mismatch every POSIX fixture key. Names are now
normalized once in buildRatchetBill (toPosixName) and the fixture filter is
tightened to test/fixtures/. All eight Bill.totals fields are rebuilt from the
filtered list (no fixture-polluted perInvocation/totalMd numbers for future
consumers). New coverage: Windows-separator normalization pins, a
captureContextBudget round-trip against tree-a (headroom math exact), a
stripFields regression pin (interactive/benefits-from absent from renders,
hooks/gbrain preserved), and the ceilings test no longer double-reports
stale-fixture entries.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
