Verified first on the local calls stack: a participant who left and rejoined
~3 s later played "leave" then "join" every time. Cues now go through
createCallSoundDebouncer (per USER, not per device):
- a leave cue waits 5 s; if the same user is back before it fires, the leave is
cancelled and no join cue is played either;
- a join cue is suppressed for a user who left < 60 s ago;
- same-kind cues within 250 ms collapse, so a batch of leaves still sounds once;
- a second device of someone already present is not a new arrival, and a
device switch is quiet.
Only the sound is debounced; membership UI is unchanged. Sound style, volume
and PTT interplay untouched (the style is read at play time). Timers are
injected — unit-tested with a manual clock. Re-ran the flap scenario headless:
join → flap → (silence) → real leave → one "leave" 5 s later → rejoin within
60 s → silence.
Also enables msc4133 (custom profile fields → in-call avatar decorations) on
the dev Synapse.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA
P5-10 Voice Channel User Limit:
- New StateEvent.LotusVoiceLimit (io.lotus.voice_limit) with { max_users }
- RoomVoiceLimit admin control in Room Settings > General > Voice
(power-level gated via permissions.stateEvent)
- CallPrescreen reads the limit reactively and disables Join with a
'Channel Full (N/N)' message at capacity; existing members can rejoin
P5-16 Custom Join/Leave Sound Effects:
- useCallJoinLeaveSounds hook wired into CallUtils; detects participant
join/leave via MatrixRTCSession membership changes (sender|deviceId),
filters out self, only fires while joined
- Sounds synthesized in-browser with Web Audio (callSounds.ts) - no
assets bundled; styles Off/Chime/Soft/Retro
- 'Join & Leave Sounds' selector in Settings > Calls (previews on change)
Docs: LOTUS_FEATURES.md, README.md, LOTUS_TODO.md (P5-10/P5-16 marked done)
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>