Component and store cases for everything in this series, several of
which exist because the thing they pin is invisible everywhere else:
- `view-lifecycle` and `keyboard-reach` — a document listener count
that does not grow across a simulated navigate cycle, and a tab
sequence that reaches the sidebar and plays a row without a mouse.
- `notifications`, `notification-store`, `confirm-dialog`,
`empty-states` — the four levels, the (level, region, key)
coalescing window, and loading/failed/empty as three states.
- `card-grid-repaint` — fails if `artists-view`'s or `genres-view`'s
per-render arrow functions are hoisted to stable fields, which is
the audit's own recommendation and takes the cards from 1 highlighted
to 0. It exists for no other reason.
- `lazy-track-details` — reads the five sources and fails on a
returning static import, the same shape as `TestNoDirectRuntimeEmits`
and for the same reason: the invariant is about what the code does
*not* say.
- `now-playing` — a position report that changes nothing must not
touch the DOM again, and a track change must. The first fails
against the old unconditional `updated()`.
- `playlist-virtualization`, `list-render-cost`, `selection`, `icons`,
and the store cases for the library-filter race, the never-settling
waiter and the per-playlist patch.
A coding agent could develop this repo's Go packages and could not
develop the application: every path to running YellowJacket ended in a
blocking GTK window, so 265 bound methods, 46 events, 33 component
directories and 13 stores had exactly one form of verification
available — `tsc --noEmit`.
The unlock is that `wails dev`'s dev server on :34115 serves the real
frontend with the real generated bindings against the same Go backend a
desktop window attaches to, so a plain Chromium under Xvfb gets a fully
functional app. Four test tiers now exist, cheapest first:
- `make ui-test` — 313 Vitest tests in a real browser in ~2 s, no app,
no backend, no display. Works because `frontend/wailsjs/` is a pure
passthrough to `window.go`/`window.runtime`, so faking just those two
globals runs the real bindings and the real store code.
- `make test` — services in-process, asserting on the payload the
frontend would receive, via a new `events.Emit` wrapper.
- `make dev-headless` + `playwright-cli` — the real app, driven
interactively, with an event bridge on `window.__yjEvents` and a
dev-only control surface at `/__test/`.
- `make e2e` — 19 of those flows frozen as Playwright specs.
`events.Emit(ctx, …)` replaces all 35 direct `runtime.EventsEmit` call
sites: wails' `getEvents` `log.Fatalf`s on any context without its
runtime, so those paths could not run under test and a background
worker could take the app down. Four packages had each hand-rolled the
same guard; nine more guarded on `ctx != nil`, which does not help.
`TestNoDirectRuntimeEmits` fails the build on a new one.
Fixtures are generated, not committed (`make testdata`), and seeds are
built by *running the app* — never by hand-writing config and DB rows,
which would be a second description of a valid YJ_HOME.
`.gitea/workflows/ci.yml` is the first workflow here that tests
anything; the other three only package, so `gitea_ci` reported only
packaging jobs and misled anyone asking whether a push was healthy.
Both jobs were prototyped to green in a bare ubuntu:24.04 container
before the YAML was written, which immediately caught `make lint`
linting three configurations that nothing builds: all three passes
omitted `webkit2_41`, so wails resolved webkit2gtk-4.0 — which Arch
still ships and Ubuntu 24.04 dropped.
Operational instructions live in `.pi/skills/yellowjacket-dev/`,
measured discoveries in `.planning/NOTES.md`, and architecture in
`CLAUDE.md` — split by tense, not by topic, because a topical split
gives every new fact two plausible homes. `make skill-check` fails a
commit if the skill cites a make target that does not exist.
logan