Audit fixes (each verified against the actual code path):
H-1 (server): track force-sync initiator on PREPARE; let the demoted
initiator's EXECUTE through the host-only gate so mid-sync demotion no
longer strands the whole room paused. Clear on EXECUTE/peer-leave.
M-1 (background): episode-lobby gate now uses !amController() for parity
with CONTENT_EVENT and server gates — co-hosts can drive the room and
initiate lobbies, not just the owner.
M-2/M-3 (popup/content/background): forceSyncReset respects hcmGuestLocked;
desynced guest skips EPISODE_LOBBY so they don't get frozen in pause after
lobby completion, and checkEpisodeLobbyCompletion excludes desynced peers
from the required count so they don't block the lobby.
M-4 (background): getHostSyncTarget clamps extrapolation to 2x heartbeat
interval so a stale host heartbeat can't snap the guest tens of seconds
past the host's real position.
L-1..L-4 (server/content/background/popup): clarify dedup comment re:
network-blip window, enforce desync invariant on SW-restore, add
forceSyncBtn guest-locked backstop, refresh badge text in place.
Backward compatibility (verified by BC-1..BC-4 regression tests):
- Old client ↔ new server: server adds fields only, never requires; old
heartbeats stripped of desynced; host-only enforced server-side even
when the client has no awareness.
- New client ↔ old server: empty capabilities → host-control UI hidden,
all gates default to everyone, behavior byte-identical to pre-HCM.
- Mixed rooms: every pre-HCM event type relays cleanly in both directions.
Generalizes host-only from a single host to a controller SET. The owner (creator)
can promote/demote peers; in host-only mode the relay gate allows any controller,
not just the owner. Single-host is now the special case controllers={owner}, so
existing behavior/tests are unchanged.
- shared: CAPABILITIES.CO_HOST enabled; new SET_PEER_ROLE event; CONTROL_MODE
payload carries controllers.
- server: room.controllers Set (always incl. owner), advertised in ROOM_DATA;
gate checks controllers.has(peerId); SET_PEER_ROLE handler (owner-only, target
must be present, MAX_CONTROLLERS=10 cap, re-sync on reject); controlModePayload
helper for consistent emits; owner-leave resets controllers + falls back to
everyone, co-host-leave broadcasts the updated list (dedup/reconnect guarded).
- WS test: promote→drive, plain guest still gated, non-owner can't promote,
demote→re-gated.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
- Move KNOWN_LIMITATIONS.md → docs/KNOWN_LIMITATIONS.md (+ fix SECURITY.md link).
- WS test: in default 'everyone' mode a non-host guest can still drive
play/pause/seek/force-sync/episode-lobby — proves host-control OFF == unchanged
behavior.
- docs/host-control-mode-COHOST-PLAN.md: plan for multi-controller (owner grants
drive rights to several co-hosts), built on the capabilities hook; covers the
gate generalization, roles, backwards-compat, edge cases, and a separate
large-room (510-peer) scaling track.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Findings recovered from the multi-agent audit (verification phase was cut off by a
usage limit; verified inline against the code):
HIGH:
- Host was demoted on peerId dedup (fast reconnect / second tab): the dedup path
removes the old socket and the kicked socket's 'disconnect' both ran the
host-leave fallback before the same peerId re-joined → room silently unlocked on
every host network blip. Now skip the fallback while a join for that peerId is in
flight (peerJoinLocks). Regression test added. (A long real disconnect still
falls back — that's the deferred host-grace EC-10.)
- Episode auto-advance froze a gated guest: in host-only the guest's EPISODE_LOBBY
is dropped server-side, but the guest still self-paused (PAUSE_FOR_LOBBY) waiting
for readies that never came → 60s freeze. A host-only guest now skips creating a
lobby (the host drives episode sync).
LOW / cleanup:
- GET_HCM_STRINGS could return a raw key name ("HCM_DIALOG_TITLE") if the locale
dictionary failed to load (getMessage returns the key on miss) → omit it so
content keeps its English fallback.
- hcmReset now also clears the snap-back cooldown + buffering grace, so a stale
cooldown can't swallow the first snap-back after a room/host change.
- Popup play/pause labels reset on lock too (not just unlock), so a button can't
freeze on "Playing…" when host-only activates mid-click.
- Fix a stale comment (heartbeat now carries 'desynced').
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Replace the implicit "hostPeerId present ⇒ feature supported" heuristic with an
explicit capabilities list the relay advertises in ROOM_DATA. Cleaner, self-
documenting, and the extensible hook for the planned co-host feature (owner
promotes guests to extra controllers) — a future 'co-host' capability + events
slot in without a protocol bump.
- shared: CAPABILITIES { HOST_CONTROL }.
- server: SERVER_CAPABILITIES advertised in ROOM_DATA.
- background: track serverCapabilities (empty against older relay), serverSupports(),
thread hostControlSupported through GET_STATUS / GET_CONTROL_MODE / CONTROL_MODE.
- popup: gate the host-control card on the explicit capability instead of hostPeerId.
Backwards-compatible both ways: old relay omits the field → feature stays hidden
(no errors); old client ignores the field. WS test asserts ROOM_DATA advertises
the capability. Adds docs/host-control-mode-TESTING.md (beta-server setup, wss
caveat, two-new-clients note, verification checklist).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Bis auf peerId-Auth (akzeptiert) alle Audit-Findings behoben:
- Snap-back spielt nicht mehr blind ab, wenn Host-Status unbekannt
- Teardown-Pfade broadcasten jetzt CONTROL_MODE → kein verwaistes Badge/Dialog
- Dialog-Timer bei Ersetzung sauber gecleart
- Server re-synchronisiert Sender bei nicht-Host-Reject
- Popup-Toggle revertiert bei Server-Ablehnung
- Desync-Zweig sendet keine Phantom-ACKs mehr an Host
- Toggle-Debouncing serverseitig (500ms pro Raum)
- Button-Text auf Unlock zurückgesetzt
- Live-Erkennung defensiver, Resync-Retry bei fehlendem Target, Badge-Retry
Neu: Host sieht 'Solo'-Badge für desyncte Gäste via PEER_STATUS-Heartbeat
(16 Sprachen, neuer i18n-Key BADGE_DESYNCED/TOOLTIP_PEER_DESYNCED)
Tests: H-5-Reject-Unicast, M-4-Debounce, Desync-Heartbeat-Relay
Step 2 of host control mode (server-side, fully testable without UI):
- Room now tracks hostPeerId (= first joiner) and controlMode ('everyone' default).
- ROOM_DATA carries hostPeerId + controlMode so clients know their role on join.
- SET_CONTROL_MODE handler: host-only authority check, broadcasts CONTROL_MODE.
- Relay gate: in host-only mode, drop room-moving events (play/pause/seek/
force-sync/episode-lobby) from non-host guests — robust chokepoint that kills
spam regardless of client. Heartbeats/ACKs/episode-ready still pass.
- removePeerFromRoom: if the host leaves, fall back to 'everyone' and reassign
host to the earliest remaining peer (v1: immediate, no grace period).
Extends the WS integration test suite to cover all of the above.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Raise the per-socket event budget from 30 to 50 per 10s to give legitimate
bursts (episode joins, force-sync, ACK flurries) more headroom. Extract the
previously inline connection/event/health/admin windows and limits into named
constants (CONNECTION_RATE_LIMIT, EVENT_RATE_LIMIT, *_WINDOW_MS). Tests now
derive their thresholds from the exported constants instead of hardcoding them.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Add two new languages (uk, zh / zh_CN) across the extension and website:
register them in SUPPORTED_LANGUAGES, the Chrome _locales map, the website
build/lang-init/app routing, hreflang/og/schema tags and language selectors.
Fix systematic machine-translation word-sense errors in the new zh/uk
locales (e.g. zh "Status"=地位→状态, "Leave Room"=留出空间→离开房间,
"Play"=玩→播放, "Seek"=寻找→跳转, audio Attack/Release/Knee; uk "Play"=Грати
→Відтворити, "Clear"=ЯСНО→Очистити, "Open"=ВІДЧИНЕНО→Відкрити, peers
"Однолітки"→"Учасники"), translate remaining English leftovers (Room ID,
Custom) and normalise terminology. All 15 locales pass test-locales.cjs.
Note: popup.html and website/template.html also carry the language-selector
additions here; their Ko-Fi→Support label text is part of the branding change.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Tests: 20 deterministic avatar assertions (exact match, case insensitive,
longest-match-wins, ZWJ sequences, fallback), 30 randomized username format
checks, and validation that every noun in the list has an emoji mapping.
Tests: connect, room create/join, password auth, play/pause/seek relay,
force_sync, event_ack, episode_lobby, peer leave, ping/pong, room list,
protocol version check, deduplication, health HTTP endpoint.
All 13 tests pass as part of npm run verify.
Move extractEpisodeId() and sameEpisode() to shared episode-utils.js.
background.js imports via ES module. content.js (IIFE) receives injected
copy via build-extension.js marker replacement, eliminating duplication.
- Create shared/names.js as single source of truth for emoji maps, noun
lists, adjectives, and username generation (215 animal emoji entries)
- Remove duplicated inline lists from popup.js and background.js; both
now import getAvatarForName / generateUsername from shared/names.js
- Add names.js to the build script sync list so it stays DRY across
extension builds
- Fix missing cat emoji: CoolCat now correctly resolves to 🐱
- Sort emoji map keys by length at lookup time to prevent substring
false-matches (e.g. 'caterpillar' before 'cat')
- CI release workflow now extracts version from tag (v1.4.0 → 1.4.0)
and injects it into manifest.base.json, shared/constants.js, and
package.json before building — the tag is the single source of truth
- Build script now copies README.md alongside constants.js and
blacklist.js from /shared → /extension/shared/ (full mirror)
- .gitignore updated: extension/shared/ is fully generated by build
- AI_INIT.md: simplified release workflow, fixed Chrome-only reference
Server Security (S-1 through S-8):
- S-1: Type-check and clamp peerId, protocolVersion, password
- S-2: Validate numeric/boolean/enum fields in relay peerData
- S-3: Construct explicit relay payload (stop spreading raw data)
- S-4: Type-check targetId and actionTimestamp in EVENT_ACK
- S-5: Restrict room IDs to [a-zA-Z0-9-] only
- S-7: Add eventCounts periodic cleanup alongside connectionCounts
- S-8: Guard version parsing against NaN bypass
Documentation (P-1, R-1 through R-6):
- P-1: Fix PRIVACY.md typo, document all in-memory data maps
- R-1/R-5: Fix stale sync-constants.bat references in shared/
- R-2: Fix stale lastTargetState ref in ARCHITECTURE.md
- R-3: Extension README title reflects cross-browser support
- R-6: Document content injection markers in scripts/README.md
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