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SPEC 8: D9, Osaka header fields under QBFT (block 0 only), found 2026-09-02

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@ -1030,6 +1030,16 @@ third-party client implementing COMMIT enforcement MUST verify over the anchor f
`height + 1 >= aere.pq.anchorBlock` (source: `testnet-public/D-311-DOVADA-2026-09-02.md`, `height + 1 >= aere.pq.anchorBlock` (source: `testnet-public/D-311-DOVADA-2026-09-02.md`,
`deploy/validators/d311-2026-09-02/SURSA.md`). `deploy/validators/d311-2026-09-02/SURSA.md`).
**D9. Osaka header fields under QBFT (found 2026-09-02, D-322).** On an AERE QBFT chain with the Osaka
fork active from genesis (the public testnet 28001: `osakaTime=0`, `futureEipsTime=0`), Besu writes the
EIP-7928 block access list hash (`balHash`) and the EIP-7843 `slotNumber` ONLY in block 0; every later block
omits both fields (measured on blocks 1 and 47744 through `eth_getBlockByNumber`). A second client that
requires them on every header, or that stamps a computed access list hash onto the processed header,
diverges at block 1. The Nethermind client accepts the chain's form after genesis and keeps validating the
fields wherever a header carries them (source: `nethermind-pqc/nethermind-intree/patches/osaka-antet-besu.sh`
in the operator repository; gate `scripts/deschise/antetul-osaka-e-al-lantului.sh`). Chain 2800 has not
reached Osaka; this divergence will apply to it on the same terms when it does.
## 9. What this specification cannot state from the published sources ## 9. What this specification cannot state from the published sources
Honest list, for completion in a later revision. An implementer hitting one of these should treat Honest list, for completion in a later revision. An implementer hitting one of these should treat