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* fix(realtime): drop WS frames without a string type (MUL-3418)
The onmessage handler dispatched every parsed frame to onAny and the
ws.on subscribers without validating its shape. A frame whose parsed JSON
lacked a string `type` (an out-of-protocol frame injected by a proxy /
extension, or a bare JSON primitive) reached the realtime-sync onAny
dispatcher, where `msg.type.split(":")` threw an uncaught TypeError out of
onmessage. The browser reported it via window.onerror, flooding PostHog
`$exception` (~12k events). Non-fatal (no crash, connection stays up), but
pure noise.
Validate once at this trust boundary: a frame must be an object carrying a
string `type`, otherwise drop it as a no-op. The bad-frame log is
rate-limited to one entry per connection — a misbehaving source can repeat
the frame hundreds of times per session.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: multica-agent <github@multica.ai>
* feat(analytics): drop benign ResizeObserver exceptions from telemetry
ResizeObserver "loop ..." errors are the dominant `$exception` bucket
(~31k events / ~1.5k users). They are a benign, self-recovering browser
quirk with no actionable signal and otherwise drown real failures and burn
the event budget. Drop them entirely in before_send (ahead of redaction
and the dedupe fuse, which only caps repeats). The match is narrow — only
the benign "loop" phrasing — so a genuine ResizeObserver bug still reports.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: multica-agent <github@multica.ai>
---------
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: multica-agent <github@multica.ai>