MOQ Protocol Freeze: Working Group Confirms Consensus on the Draft-19 Diff
WG chair Martin Duke confirmed consensus on the entire draft-18-to-draft-19 diff of draft-ietf-moq-transport — future objections need implementation or deployment experience. What the freeze means ahead of IETF 127 and the December RFC milestone.
The Media over QUIC working group just made its quietest big decision of the year. On October 16, 2026, WG chair Martin Duke confirmed on the MOQ mailing list that the working group has consensus on the entire diff from draft-18 to draft-19 of draft-ietf-moq-transport — and, crucially, set a new bar for reopening it. Any future issue against that diff must now come backed by implementation experience, deployment experience, or broad-based support that doesn't consume working-group meeting time.
In practice, this is the MOQ wire protocol entering its freeze-and-interop phase, less than a month before IETF 127 in San Francisco and six weeks ahead of the working group's December milestone: requesting publication as an RFC.
What the chair actually said
The clarification closed out a consensus call that ran from September 4 to September 23, 2026, covering the changes between draft-18 and draft-19. The full statement, verbatim:
We have consensus on the entire diff from draft-18 to draft-19, except for issues already filed in the github. Future issues against this diff must either (1) be based on implementation experience, (2) based on deployment experience, or (3) demonstrate broad-based support without use of WG meeting time.
Three things are notable in those four lines:
- "Except for issues already filed in the github" — known open issues stay open. This is not a gag order; it is a ratchet. What is settled stays settled unless reality (code or deployments) proves otherwise.
- Implementation and deployment experience are the accepted currencies. The working group is telling contributors: don't bring us aesthetics, bring us test results. That matches exactly how the Seattle interop week was run a week ago.
- "Without use of WG meeting time" — objections that can't show code or deployment need broad support gathered off-floor. Meeting agendas are now reserved for the things that block publication.
Why the diff to draft-19 is the load-bearing one
The call covered the changes between draft-18 (May) and draft-19 (July) — and that diff is no cosmetic pass. The official idiff runs to more than 200 change regions, reworking session establishment, subscription state management, location and range filters, extension negotiation, and the protocol's core definitions. Everything after that point has been refinement: draft-20 in August restructured the fetch flow, and draft-22, published October 1, kept the wire compatible while tightening details like the LOCATION_FILTER type enum. We walked through the recent deltas in detail in our IETF 2026 deep-dive.
So while draft-22 is the document implementers read today, the consensus ratchet is anchored at draft-19 — the last revision where the working group felt it needed to explicitly ask "does anyone object?" That anchor is now set.
The context: a wire that has been deliberately stable since September
This is the third freeze-like signal in six weeks, and they form a deliberate sequence:
| Date | Signal |
|---|---|
| Sep 8 | Interim minutes record an explicit decision: no wire-breaking changes before the Seattle interop |
| Sep 23 | Consensus call on the draft-18→19 diff concludes |
| Oct 8 | DEMOQED, the first MOQ-dedicated conference, runs demos against the stable wire |
| Oct 12‑15 | Seattle interop + interim: 18 clients and 21 relays tested, 1,345 test cases passed across 128 passing pairs |
| Oct 16 | Chair confirms consensus on the full draft-19 diff and raises the bar for new changes |
The automated interop runner is still publishing daily conformance runs, and the wiki's ad-hoc reports show implementations converging hard on draft-18 — moqx passing 75 of 76 checks on both transports, moq-rs 75 of 76 on WebTransport. The machinery the chair now points new objections at — implementation and deployment experience — is exactly the infrastructure this ecosystem spent October building.
What changes for teams building on MOQ
If you are prototyping against MOQT, the practical reading of the clarification:
- Draft-18-era behavior you implement today is consensus, not fashion. The odds of the core session, subscription, and fetch mechanics changing underneath you have dropped sharply. What can still change: things your testing shows are broken, ambiguities your deployment trips over.
- File issues with evidence. The github issue tracker remains the door in — but arrive with an interop log, a runner result, or a production scenario. "I think this should be different" no longer moves the spec.
- Plan for last call, not for churn. With a consensus ratchet in place and a December publication-request milestone on the Datatracker, the realistic window for input closes in stages between now and Working Group Last Call. If you have been waiting to give feedback, IETF 127 is the venue where it still counts.
IETF 127 is taking shape
The meeting runs November 14–20 in San Francisco, and the MOQ session scheduling just started moving: one of the three proposed slots — Friday, November 20, 19:00–20:30 EST — is approved, with two more (Nov 17 and Nov 19) still waiting. No agenda has been published yet. If you want the state of the protocol in person, that is the room where the draft-22 results from Seattle get argued into last-call readiness.
Meanwhile, if you want to see the Seattle interim for yourself, the working group posted the Day 1 video on October 16 — it is on YouTube here.
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