It lived in scratchpad/, which is untracked, and a tidy-up on 2026-10-22
deleted it — along with the pdf-editor's copy of the same harness. Forty
checks of coverage gone, and nothing in the repo so much as mentioned they
had existed. Anything load-bearing belongs next to the code it tests.
Rebuilt as test/e2e.mjs plus test/e2e-harness.mjs, runnable with
`npm run test:e2e`. It boots a throwaway Theseus, opens documents through
the sidebar panel, clicks the real ribbon, types with real key events, saves
and exports, then reads the result back with the add-on's own reader. The
editor carries no test-only hook, so a pass is a pass for what users get.
This is the only level that catches breakage which exists solely in the
browser — a bundle that will not load as a classic script from file://,
webfonts that register and then never fetch, a ribbon button wired to
nothing, a PDF on the wrong paper. All four have happened.
One trap is recorded in the harness: the throwaway profile must not live
under addon-build/, whose package.json declares "type": "module". Node picks
a file's module kind from the nearest package.json above it, so an add-on
seeded into a profile there is parsed as ESM and dies on its first require()
with "require is not defined in ES module scope" — which reads exactly like
the add-on being broken, and is not.
Run against today's build: 38/38, including the new start-on-first-use
activation.
8a08879c49