The pdfjs-dist literal grep added in 9260866f only caught one named
trigger of the birpc teardown race; the underlying mechanism (ADR 012 /
#553) is any async vi.mock factory whose body performs `await import(...)`.
Add a second PCRE-multiline grep matching that shape. Scoped to
**/*.{spec,test}.ts under frontend/src/, excluding __meta__ (which holds
the fixture strings exercising the meta-test). Defence in depth pairs with
the ESLint rule (saves at edit time) and the in-suite meta-test (catches
when tests run).
Verified locally with real GNU grep against a planted synthetic offender.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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