The Import list and each file's bytes belong to the page session; the data sources, pins, drop and gesture listeners belong to the attached viewer. Without a viewer the list stays and import or fly-to is refused.
The marks belong to the page session; only their drawing belongs to the attached viewer. A switch takes the drawing off, keeps the marks, and the next Cesium attachment draws them again. Without a viewer the board refuses new annotations instead of failing in the resolver.
The page creates the voice once; each engine attachment only gives it that scene's action runner, pointer canvas and annotation events. Calls made during a switch wait for the incoming engine and are refused with ENGINE_SWITCHING when none attaches in time; results name the engine that answered, and the session hears engine-changed after a switch. The analyst's follow-up memory and layer enable times outlive one engine's runner. scripts/qa-voice-engine-switch.mjs drives a fake microphone and Realtime transport through the switches.
An engine switch no longer recreates them: with a layer session they live until the page lifetime aborts; a host without one keeps the per-application lifetime.
window.__gevSession names each session object by a stable instance id and counts applications, attachments and detaches. scripts/qa-app-once.mjs (report-only with --report for now) runs three round trips and a parked-renderer rollback on a keyless preview with paid map, model and voice endpoints blocked.
The republish after a globe switch ran as a refinement ('Handoff refined'):
it sampled the incoming globe while it still showed coarse tiles and,
being a refinement, never refined again. Keyless Cesium's first terrain
tiles put Austin's streets near -2 200 m, so vehicles stayed there, and
the next globe weighted each road by the camera distance to those
waypoints (1.9 km became 4.1 km), cutting the population from about 620
to 260 until the camera moved.
The handoff is now a completed pass that refines once the incoming
surface has loaded, road density and the coverage radius are measured to
the road's coordinates on the local ground estimate instead of to the
last sampled waypoints, and flow that lands after a publication
re-allocates the retained roads' budgets instead of only recolouring
them.
Conflict resolutions:
- src/main.js: upstream's PHOTON_URL place-search setting is read once at
module level and passed as geospatial: { endpoints: { photon } } by
createApplication(), so every engine start of the switch flow gets it; the
old single top-level createStandaloneApplication() call stays removed.
- src/layers/bikeshare/render/cesium/rendering.js: upstream's
publishedCapacity fix applied with this branch's
resolveCapacity(model, capacity, status) signature. The same fix is ported
to src/layers/bikeshare/render/navara.js (record.publishedCapacity, status
polls resolve from it), with a Navara regression test; upstream's
proxyRoute test imports the moved render/cesium/rendering.js.
- src/layers/traffic/flow.js: upstream's nextTask() yield and current()
check kept before the scene is taken from this branch's
_trafficScene?.() ?? _viewer?.scene with its missing-scene return.
- scripts/package-boundaries.json, scripts/format-scope.json: union of both
sides' file lists.
- src/voice/actionSchemas.test.mjs: both history comments kept, payload hash
recomputed for the merged schemas (Sentinel-2 map stack enum plus the
shorter layer alias hint).
- src/hudAltitudeDatum.test.mjs: this branch's engine-based IntelHUD
construction with upstream's placeLabels summary context.
A picked engine now lives in the switch until it runs; only then is the
address written, so a pick superseded by Back or one that fails rewrites no
entry. An engine-changing history visit holds the outgoing share link, which
neither restores nor writes the visited entry, and the running engine takes
the address back once the switch settles, restoring any entry visited while
it was held or not yet listening. Handed-off layers keep running where the
incoming address agrees with the outgoing one and follow a visited entry
where it differs. A failed recovery keeps the error on the loading screen
with an engine picker for a retry, and a failing reveal of the new globe no
longer blocks the cover removal or later requests.
qa-all-layer-switches.mjs now checks once that Puppeteer can start Chrome and that the preview answers, and names PUPPETEER_EXECUTABLE_PATH and npx puppeteer browsers install chrome when it cannot. Each run writes <output>/acceptance.json with the commit, dirty files at both ends, Chrome, Node, base URL, times and, per scenario, status, exit code, duration, covered layer ids and the sha256 of its log. It replaces summary.json.
Live Sentinel-2 imagery is bright at this altitude, so a fixed crop of white two-pixel vehicles changed anywhere from 14 to 300 pixels. The scenario now serves a uniform dark ground tile, waits for the layer to settle with vehicles in view, projects each vehicle to the window and requires 90% of those above the drawn terrain to change the picture where the layer places them; in simulation nothing else may change. Vehicles below the terrain and the population left after the round trip are reported, not asserted.
The engine switch moves out of main.js into src/standalone/engineSwitch.js: every
engine change in the page hands the session off (layers, Director, Contacts,
directions and satellite cameras), whether it came from the picker or from
history. Each attempt has a generation; a failure rolls back to the last engine
that started, requests made during a switch or recovery are reconciled once it
settles, and a picked engine adds its history entry only after it starts. The
first-frame wait only lifts the cover and never fails a started engine; a
hidden tab does not wait. Nothing starts after pagehide, and a failed recovery
leaves the picker usable.
One provenanceLine() builds STATE | text | LAYERS for the HUD and
get_hud_caption. hasWord is one lookaround regex, capAtWord one grapheme
pass. Feed-state helpers are imported from layerSnapshot.js directly, and the
kept-whole sanitizer cases are one table.
A dial click shorter than the device start-up let suspend() run on a still-suspended context, so the later resume() left it running with no nodes. Cover paused, connecting and voice-fallback releases in radioNextState tests.
German Khokhlov