tools/scene/parity.mjs serves site/ (tools/site-serve.mjs) and the app's UI (tools/ui-mock/server.mjs) on a build box, answers
every page's /api/live from scene/fixtures/live-2026-10-07.json, freezes the clock at the fixture's instant (Date, timers,
requestAnimationFrame) and reads each scene canvas at 900 by 420 px at the first push and the next two polls: the read is the
push's own synchronous paint, so a frame depends on the fake time alone, never on how long a fetch took. Known-failed first: the
app with --included moved by one unit must differ from /live at every instant (it does: 1,549 / 1,282 / 1,157 px). Then home
fold = /live, app Inspect = /live, app with this machine's key = /live with the same key (the overlay is the same picture), and
the app's overlay frame differs from its base frame (the overlay is drawn). The compact card is rendered and reported, not
compared. A RED line names the differing pixels and their box. tools/scene/parity-remote.sh carries the files to the box
(~/.config/igneum/build-server-2 by default) under this lane's prefix and runs it there; a plain CI runner with no box and no
Playwright prints a skip line. One new line in tools/ci/pre-push.sh.
First run on build-2 at 15:4x UK, release-0.3.21 tree plus scene-parity: every comparison equal at T+0, T+2 and T+4 s.
Found on the way and fixed in the harness, not the renderer: lane order keeps the history of earlier layouts (the scene must be
at the compared size before its first layout); the app's recorded mock card is a real devnet key (cleared for the base case).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
The blank /live (the project lead, 14:3x UK): IgneumDag 2.0.2 painted only from a requestAnimationFrame loop gated on document.hidden and
the IntersectionObserver, so a page that loaded with document.hidden true (the desktop pane, a background tab) and whose embedder
never fired visibilitychange took every push, reported live and never drew a frame. 2.0.3 paints the current picture synchronously
on push, size and theme change; the motion loop alone waits for a visible document and an intersecting canvas. Confirmed headless
on build-2 against the live feed: hidden document 0 lit pixels before, 110,007 after; the never-intersecting observer repaints
on every push. Known-failed test tools/scene/paint-test.cjs (the 2.0.2 renderer draws nothing in the same world).
The second 2.0.3 change: the phone rule (30 s window, four lanes) keys on the viewport width, not the canvas width; a 640 px hero
on a 1,440 px laptop was rendering as a phone while the app's card beside it was not.
scene/ is the one source: live-dag.js, proof-core.js, tokens.css (the fourteen palette tokens, the brand package's values, dark and
light), feed-contract.md and .json (one JSON shape for the observer's /api/live and the app's api/live), a recorded reply as the
fixture. tools/scene/sync.mjs writes the copies and the scene-tokens block into site.css and app.css; --check is the gate line
(byte-equal scripts, an equal block, the names defined nowhere else, a print block excepted), --self-test fails five known cases
first. The site's token definitions move out of the package's :root line into the block; no value changes on the site.
tools/scene/feed-contract.mjs validates a reply against the key lists; its test refuses a miner rewritten to "you", a float now,
a stray key. Three new lines in tools/ci/pre-push.sh. The app side (branch scene-parity, for 0.3.21) takes the same folder.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
