What happened
Retained developer admin privileges were abused.
Transaction-level mechanics
Public post-incident disclosures do not include full transaction calldata or execution traces for this incident.
TODO: Add exact Safe transaction hash, decoded actions, and the on-chain state changes once verified primary sources are available. For now, the attack vector summary above is derived from public reporting.
What independent decoding / hash verification / config scanning would have caught
A Safe-Inspector-style privilege review ('is this owner/role expected?') is precisely the check that would surface a leftover privileged address.
Verdict
Could have helped partially