AGENTS.md had drifted from CLAUDE.md (ASCII dashes instead of em-dashes,
missing recent updates); both now carry identical content except for the
header, with an explicit rule to keep them in sync on future edits. Also
documents update-version.sh as the release workflow, the per-feature
partial-class split of MainWindowViewModel, UpdateChecker, and fixes a
reference to a nonexistent Core/Spv/MerkleVerifier.cs (the real file is
MerkleProof.cs) in SECURITY.md.
README's "Running tests" section now lists what each test area covers and
how to measure coverage; CLAUDE.md/AGENTS.md point future work at extending
the fake ElectrumX server instead of mocking ElectrumClient (it isn't an
interface, by design).
davide