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This commit only updates an internal coding-style guide (AGENTS.md) for developers. It adds a recommendation to use a particular Rust macro (`hex!`) when writing unit tests. There is no code change, no bug fix, and no security relevance.
This commit hardens how the BitBox02 firmware derives and exposes Cardano public keys (xpubs) by computing them twice and comparing the results. This matches a safety pattern already used for Bitcoin, meant to catch rare hardware errors or…
Defensive bitflip / fault-injection mitigation added to xpub derivationCommit message explicitly describes security relevance ('bitflip-mitigation pattern', 'critical Bitcoin xpub operations')Cardano host-facing xpub derivation now double-computed and compared