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st-sync.js wraps SyncManager, the native protocol. Three properties drove the shape of it. It repeats the sync broadcast at 1Hz so a player powered on late still joins, which means acting on every repeat would reload the video once a second forever — on screen that reads as a stutter, not as a sync fault, so the id dedupe is mandatory rather than an optimisation. The leader starts from its OWN broadcast rather than at announce() time, or it runs ahead of the group by the width of the network. And attachVideo refuses an element with no setSyncParams instead of half-syncing it. offline.html is the local fallback the host falls back to after three failed loads. It names the server, keeps probing with capped backoff so a site full of panels cannot storm a server that is coming back, and asks the HOST to restart the player when it answers — never navigating itself, for the same reason the player never reloads itself here. The resolver now models multicast reach. All-BrightSign groups spread across subnets no longer get native sync: each subnet would sync neatly within itself while drifting from the others, and the dashboard would show a healthy group throughout. The IP comparison is a heuristic so it is used in one direction only — differing networks are evidence against, matching ones are never proof for, and unknown addresses block nothing. st-sync.js is served from its single source like the bridge, and the SD card deliberately carries neither: the player pulls both from the server so a stale copy on a card can never skew from the player using it. 948 pass. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Uaeo9MvzKoyXuN6ZsbhtkL |
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