Chat commands:
- !skip: per-user 60 s cooldown (was global 5 s). Each chatter gets one
skip per minute; rejection includes a wait hint so users know
it's their own gate.
- !queue: peek next 3 tracks from the MPD queue. Read-only, no cooldown.
- !info: full metadata for now-playing — artist · title · album (year)
· genre, with missing tags skipped to avoid empty parens.
Mattermost going-live notifier (optional, MM_HOOK env):
- Polls https://ophi118.com/api/status.json (the public service in
station/server/) every 60 s and POSTs a single message to the
configured Mattermost webhook on each offline→live transition.
- Transition detection keys on Twitch's started_at, not just the live
flag, so a Helix flap inside one stream doesn't double-fire. Cold
start mid-stream is intentionally silent — records the current
started_at, awaits next genuine transition. Override the polled
endpoint with STATUS_URL for private status services.
.env.example documents the new MM_HOOK / STATUS_URL knobs.
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