Pre-fix, the M1 priority pack `((trackPriority and 0xFF) shl 24)`
would set bit 31 whenever `trackPriority >= 0x80`, producing a
negative `Int`. `QuicConnectionWriter.sortedByDescending { it.priority }`
sorts via signed `Int.compareTo`, so negative-signed values land
BELOW every positive priority — exactly inverting the intended
"higher trackPriority drains first" ordering.
The default `DEFAULT_TRACK_PRIORITY = 0x80` sits exactly on this
boundary, so this would have hit production the moment a hand-
tuned `trackPriority=0xFF` (highest intended) appeared in any
multi-track scenario.
Reshape the layout to keep bit 31 clear:
bit 31 : 0 (reserved as the sign bit)
bits 30..23 : trackPriority u8 (0..255)
bits 22..0 : sequence low 23 bits (~97 days at 1 grp/sec)
The trackPriority byte still occupies an 8-bit slot, just shifted
one bit lower. Sequence saturation moves from 24 bits (≈ 6 days)
to 23 bits (≈ 97 days) — still ample for the 9-minute JWT refresh
cycle.
Two regression tests:
- The existing `publisher_packs_trackPriority_and_sequence_into_setPriority_value`
is updated to assert the new bit layout AND that the encoded
value is non-negative.
- New `publisher_priority_pack_keeps_top_trackPriority_above_lower_trackPriority`
is the direct guard against the bug: `trackPriority=0xFF`
must encode HIGHER than `trackPriority=0x7F`. Pre-fix this
test fails with `0xFF` encoding to a negative Int below the
positive `0x7F` encoding; post-fix both are positive and
correctly ordered.
Surfaced by the merge-prep security review of the moq-lite
Lite-03/04 audit branch — agent flagged it as "QoS/correctness
not security, excluded by DoS rule" but it's a real bug worth
fixing before merge.
Audit doc updated: bit layout in `nestsClient/plans/2026-05-09-moq-lite-rfc-compliance.md`
(M1 + L4 entries).
https://claude.ai/code/session_012TGfo99Ugz7fcCPv85a8Tq
Adds Fix#6 (L2 — SubscribeOk narrowing), Fix#7 (L3 —
subscriber-driven Probe API), and Fix#8 (L1 — version-aware
Lite-03/04 codec + ALPN negotiation) to the compliance audit
document. Updates the gap matrix (L1/L2/L3 → ✅) and the TL;DR
(now reads "nine shipped fixes + M6 closed; every gap is now
resolved, no items remain deferred").
The "what's deliberately deferred" section now lists only the
external follow-up — a `kixelated/moq` feature request
suggesting per-deployment tuning of moq-rs's per-subscriber
forward-queue starvation behavior. That's an upstream-relay
concern, not a moq-lite gap.
Updates the audio-rooms completion-plan pointer to reflect the
shipped count and the absence of remaining deferrals. Audit doc
title acknowledges Lite-04 alongside Lite-03 since the codec
now speaks both.
https://claude.ai/code/session_012TGfo99Ugz7fcCPv85a8Tq
Adds Fix#5 (M2 + M3 — STOP_SENDING for single-group cancel +
RESET_STREAM with typed code on Drop replies) to the compliance
audit doc. The two items shipped together because the plumbing is
shared — extending `:quic`'s StrippedWtStream with reset/stopSending
closures, extending the WebTransport interfaces, and routing through
all adapters was the prerequisite for both.
Updates the gap matrix (M2 + M3 → ✅), the TL;DR (now reads "six
shipped fixes + M6 closed; no 🟡 items remain open"), and the
deferred-items list (only L1 / L2 / L3 remain, all 🟦 with explicit
rationale).
Updates the audio-rooms completion-plan pointer with the new
shipped count.
https://claude.ai/code/session_012TGfo99Ugz7fcCPv85a8Tq
Adds Fix#3 (M1 — trackPriority + sequence bit-pack matching kixelated
PriorityHandle), Fix#4 (L5 — fresh publisher list at dispatch
time), and the M6 closure (verified via WebFetch that Goaway has no
body schema in moq-lite Lite-03 — `rs/moq-lite/src/lite/{stream,
client}.rs`; our recognise/log/FIN handler is canonical) to the
compliance audit document.
Also marks L4 closed (subsumed by M1 — the saturating cast guard
collapsed into the per-track high byte logic).
Updates the audio-rooms completion-plan pointer with the new shipped
count: four publisher-side spec tightenings + one closure (M6) +
five 🟡 / 🟦 items explicitly deferred with rationale.
Remaining deferrals: M2 + M3 (need WebTransport/`:quic` interface
extension, locked per audit prompt), L1 (Lite-04 codec rewrite, no
relay forces it), L2 + L3 (no consumer for the API).
https://claude.ai/code/session_012TGfo99Ugz7fcCPv85a8Tq
Records the cross-spec compliance audit of the moq-lite Lite-03
implementation against kixelated's reference Rust impl
(github.com/kixelated/moq, rs/moq-lite/). Methodology mirrors the
recent QUIC RFC review: walked every Kotlin source under
`moq/lite/`, traced data flow speaker → relay → listener, and
cross-referenced each on-wire message + control byte against the
Rust reference.
Outcome: no 🔴 wire-incompatibilities found. Every codec primitive —
control type discriminators, AnnouncePlease, Announce, Subscribe
(incl. the `Option<u64>` off-by-one and `Duration` millis-as-varint
conventions), SubscribeOk/Drop with the type-outside-size-prefix
framing peculiar to Lite-03, GroupHeader, Probe — matches byte-for-
byte.
Six 🟡 (spec-loose / future-fragile) and four 🟦 (diagnostic /
observability) gaps documented:
- M1 stream priority parity vs kixelated's PriorityHandle
(single-track Opus impact: invisible)
- M2 STOP_SENDING for single-group cancel not exposed
- M3 RESET_STREAM with Error::to_code not used
- M4 AnnouncePlease prefix-mismatch falsely emits Active — fixed
in 6c2d7efc
- M5 inbound Subscribe doesn't validate broadcast field — fixed
in 3dcee2a4
- M6 Goaway body / migration handler
Also references the new audit from `2026-04-26-audio-rooms-completion.md`
so future readers find it via the completion-plan pointer.
https://claude.ai/code/session_012TGfo99Ugz7fcCPv85a8Tq
Claude