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feat: implement Engine API to interface with execution layer clients

enhancementNew feature or requestNew feature or request

Status: Open.

#1012 In blockblaz/zeam;

· ch4r10t33r opened on Jun 26, 2026

Intermittent Type-2 merge corruption in-process: ~1/1000 proposals produce an invalid block proof from valid inputs (reproduced under Shadow)

Status: Open.

#991 In blockblaz/zeam;

· GrapeBaBa opened on Jun 11, 2026

libp2p-glue: soft wedge of swarm task on memory-limited (≤4 GiB) hosts after first reconnect-storm

Status: Open.

#958 In blockblaz/zeam;

· ch4r10t33r opened on May 31, 2026

All zeam nodes stall on devnet: snappyz.decodeWithMax rejects every block gossip message as error.Corrupt

Status: Open.

#942 In blockblaz/zeam;

· ch4r10t33r opened on May 27, 2026

node, aggregation: flat 8-raw XMSS prove tail (~4s p95) vs lantern/qlean on 8-validator subnet

Status: Open.

#940 In blockblaz/zeam;

· ch4r10t33r opened on May 26, 2026

types/block.zig: evaluate or remove finishSingleRawAggregatePrep degenerate fast-path

Status: Open.

#928 In blockblaz/zeam;

· zclawz opened on May 25, 2026

sync: propagate serving peer hint through gossip and cached-descendant paths

enhancementNew feature or requestNew feature or request

sync

Status: Open.

#912 In blockblaz/zeam;

· zclawz opened on May 21, 2026

sync: make blocks_by_root peer selection slot-aware

bugSomething isn't workingSomething isn't working

Status: Open.

#910 In blockblaz/zeam;

· zclawz opened on May 21, 2026

node, aggregation: zeam aggregate-build is 5–7x slower than ethlambda on devnet (2–3s vs 0.4s)

Status: Open.

#899 In blockblaz/zeam;

· ch4r10t33r opened on May 19, 2026

node, forkchoice: keep libxev tick callbacks off the forkchoice main mutex

bugSomething isn't workingSomething isn't working

Investigation

Status: Open.

#897 In blockblaz/zeam;

· ch4r10t33r opened on May 19, 2026

node: parallel XMSS verify with serial fork-choice apply for gossip aggregations

Status: Open.

#895 In blockblaz/zeam;

· ch4r10t33r opened on May 18, 2026

Investigate xev loop spikes: network/gossip/reqresp vs onBlock (Loki follow-up to #863)

Status: Open.

#867 In blockblaz/zeam;

· ch4r10t33r opened on May 13, 2026