"""dds — the toolchain package (protocol 2).

The instruments as an importable, installable library: check_join
(the gate), verdicts (the shared verifier), witness/tsq (tree-sitter
legs), batch_judge (the judged leg), cli (the `dds` command).

Same repo, same version, same hash chain as the skills and the canon —
the lib is a projection of the one versioned unit, never a second
distribution artifact (a split would recreate the version-skew seam;
see spec/protocol-2.md).
"""