feat(release): № 009 rebuilt — a model city whose people go indoors and talk

[PSheon]

What ships

№ 009 city-of-agents, the city rebuilt (zh + en)

• The scene is a model city now: a plinth under a gradient sky with a sunset on the sun's side, gable roofs on the houses, glass towers on podiums with set-back crowns and roof plant, lane markings, park paths, doors, soft shadows, walls darkened towards the ground, office glass that reflects the hour's sky, a river that catches the sun. 16 draw calls (was 10), measured in the Overseer.
• The people are whole figures (legs, arms, hands, head, hair, shoes) whose limbs swing in the shader; skin, hair and trousers differ per person, the shirt carries the activity's colour. On screen only — the simulation and every number it gives are unchanged — people at work, a meal or asleep walk in through their door and come back out, and people in a park pair up and take turns talking, with a speech bubble.
• The follow badge says what the person is doing and where: 「正在跟拍 · 佳穎 5 ● 前往 工作 · 辦公(商業區 C4)」.
• Fig. 01 gets a strip under the picture: what share of people is doing what in each ten minutes of today, yesterday faint, a line at now. People go indoors, so the scene alone no longer shows it.
• Fig. 04 gets a body-clock switch. Off, the needs head is run again: people asleep at home at 01:00 / 12:00 go from 73 % / 3 % to 38 % / 16 %.

The article's text, read against the code and the figures:

• The numbers beside fig. 04 are now the ones fig. 04 shows (12 % / 10 %, was the offline 11 % / 9 %).
• Six sentences that said what the code does not do: the clock ran backwards ("one second in the city is ten minutes outside"), people do not re-decide on arriving, the random head idles one time in five, parks are only in the outer ring, fig. 04's read-out counts sleep and not everyone at home, and the sources paragraph pointed at a phrase that is gone.
• Checked and unchanged: 373 buildings, 639 nodes, 863 edges and two parks for seed 1; fig. 03's 0.573 / 0.482; the first draft's 28.8 hours; 0.095 ms per tick.

Docs: docs/HANDOFF.md, where № 015 went (c346092).

Left open on purpose

People walk 9 m a minute, a tenth of real walking pace, in a city drawn in metres; the article does not state the pace, and changing it would move every measured number. Paul chose to leave it.

Checked

• pnpm lint, pnpm typecheck, pnpm test (324 passed, 2 skipped).
• pnpm build and the city's E2E and axe runs: 14 passed (smoke, axe light and dark, control sizes; desktop and mobile). The smoke test now also unticks the body clock and waits for fig. 01's strip.
• Looked at in the browser at 1440 and 390 wide, morning, noon, dusk and night, following people in and out of doors and in a park; no console warnings.

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated
paul-notebook	Ready	Preview	Sep 27, 2026 10:34am UTC