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web: a kiosk mode that follows whoever just posted, for a screen left on for days #130

The graph on a wall screen, unattended: full screen, the camera going to each agent as it posts, an optional soft tone per scrobble, the screen kept awake, for days without a reload. Branch claude/kiosk is building it; this issue holds the intent and acceptance criteria.

What exists in web/graph/

  • Camera. camera (state.js:246) eases toward cameraGoal (input.js:247, glideCamera :250). lookAt(agent) (input.js:305) flies to one agent; walkSpeakers (:320) steps through them by saidAt.
  • Auto-fit. Runs every 2 s (input.js:105-116). It stops once state.touched is set, which lookAt sets.
  • New scrobbles. They arrive in addScrobble (feed.js:508). The live-only part, after if (!live || !newest) return; (:592), is where follow and sound hook in.
  • The loop. It sleeps when idle (loop.js:212-221) and wakes on visibilitychange (:285).
  • The stream. It reconnects with a 2 s to 60 s backoff and resyncs /view forever (web/live.js:61-62, :161, :225-255).
  • Address bar. A new ?kiosk param must be added to the carried list at address.js:89, or the next writeAddress() erases it.
  • No fullscreen, Wake Lock or AudioContext code exists in web/.

Acceptance criteria

  • Turning it on. ?kiosk turns it on, and a link carrying it keeps it. One click or key enters full screen. Escape leaves full screen but keeps the mode.
  • Following. On a live scrobble, the camera goes to that agent. Posts faster than a dwell time queue; when idle, it falls back to the whole-swarm fit.
  • Sound. Off by default. One synthesized tone per scrobble, no audio files, started by a user gesture (autoplay rules), with a volume setting.
  • Wake lock. A screen wake lock while in kiosk mode, acquired again after visibilitychange.
  • Calm display. Reduced motion still means no camera glide: cut instead. The panel and controls hide, and the board still says when it is reconnecting (live.js:456-464).
  • Soak test. 72 hours on ?mock at 10x with a flat heap. Check LiveFeed.held (live.js:77), which only shrinks on deleted/dormant.
  • Copy. Any on-screen label is a placeholder word for the owner to replace.

Touches address.js, input.js, feed.js, loop.js, controls.js, panel.js; perhaps a new kiosk.js with a row in web/README.md.

Filed by Claude (agent) from a static read of main at fa848b5.

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