Ignored the unrecognised element and completed the follow-up request.
The client did what the clause requires.
What was measured
- Client
- neqo — neqo (Firefox), 0.31.1
- Test
- Reserved frame type on the response stream —
h-grease-frame - Clause
- RFC 9114 §7.2.8 (MUST)
- Class
- extensibility — Ignored something unknown and carried on.
- Required behaviour
- Skip the frame using its length and read the response that follows.
- Measured
- 2026-09-18
Reproduce it
The suite is the judge, so the reproduction is to point the same client at the same test and let the server report what it saw.
SESSION=$(curl -sX POST https://conformance.pqcrypta.com/session | jq -r .id)
# then drive neqo at the test URL and read the verdict:
curl -s https://conformance.pqcrypta.com/report/$SESSION.json | jq '.results["h-grease-frame"]'