Handled it: ignored the extension, which the specification permits.
The client did what the clause requires.
What was measured
- Client
- quico — quico + lemon-tls, 0.7.0 (npm)
- Test
- ACK Frequency extension offered —
q-ack-frequency - Clause
- draft-ietf-quic-ack-frequency (MAY)
- Class
- discretionary — The RFC permits either behaviour; the report says which was chosen.
- Required behaviour
- Negotiate the extension, or ignore it. Either is correct; failing is not.
- Measured
- 2026-10-15
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=$(curl -sX POST https://conformance.pqcrypta.com/session | jq -r .id)
# then drive quico at the test URL and read the verdict:
curl -s https://conformance.pqcrypta.com/report/$SESSION.json | jq '.results["q-ack-frequency"]'