[bkeroack]

A trailing asof:<blockhash> is now the opt-in by itself. take_trailing_asof refused it with asof requires protocol 1.4.2-asof unless the connection had negotiated that dialect. Negotiating it also sets conn.protocol to 1.4.2-asof, so protocol_ge_1_6 is false for the whole connection: a client that wanted as-of lost 1.6 shapes such as the blockchain.block.headers headers array.

• take_trailing_asof and electrum_at_chain_view lose the asof_ok flag; the three per-method callers and the connection path stop computing it.
• server.version(name, "1.4.2-asof") is still accepted and still echoed, so clients that negotiate it see no change. server.features still reports asof and asof_protocol.
• The token is still recognised only by its asof: prefix as the last argument, on the five methods in method_stamps_chain_tip. A bare trailing hex hash is still not taken as asof.

Test: electrum_and_esplora_asof_hides_later_spend now opens a 1.6 connection, sends asof: on get_balance and gets the as-of balance and chain_tip, then checks block.headers still returns headers. It failed before the change with asof requires protocol 1.4.2-asof. The rest of the journey still runs on a 1.4.2-asof connection.

Local: fmt, clippy, deny, ast-grep and ci-os-smoke.sh pass. cargo test --workspace --no-fail-fast had two timing failures outside Electrum under full-workspace load (tip_accept::two_full_senders_both_enqueue, cross_surface::sv2_tp_bootstrap); each passes 3 of 3 alone.

🤖 Generated with Claude Code

[rearden-grok]

REQUEST_CHANGES

1 bug, 1 nit.

The scripthash and transaction.get rows in COMPAT.md still require negotiating 1.4.2-asof. See the comment on the new paragraph: a 1.6 client that follows those rows still loses 1.6 shapes.

Nit: the updated dispatch assertion message still says "without dialect".

[rearden-grok]

The scripthash row still says a trailing asof: "Requires negotiated 1.4.2-asof (first server.version only)", and the transaction.get / get_merkle row still says "same dialect as scripthash". This paragraph says the token works on any negotiated protocol. A client that follows the method table sends server.version with 1.4.2-asof. negotiate_protocol still returns that string, so protocol_ge_1_6 stays false and blockchain.block.headers stays the 1.4 hex blob. Drop the requirement from both rows. Keep asof_protocol as the legacy version that pins 1.4.x shapes; the last sentence here should not tell a client that negotiating it is how they turn the token on.

[bkeroack]

Addressed in 22cdebb: the scripthash and transaction.get / get_merkle rows no longer require the dialect, the server.version row and the paragraph call 1.4.2-asof the legacy dialect that pins 1.4.x shapes, and discovery is server.features.asof.

[rearden-grok]

Nit: the failure text still says "asof without dialect". This check is now that an unknown hash returns asof not on chain.

[bkeroack]

Addressed in 22cdebb: the message is now "unknown asof hash".

[rearden-grok]

APPROVE

Both earlier findings are fixed. The scripthash and transaction.get / get_merkle rows no longer require negotiating 1.4.2-asof, and asof_protocol is the legacy pin that still forces 1.4.x shapes. The assertion message now says unknown asof hash.

Nothing new. The added commit is those two edits only.