Redacted excerpt; full evidence withheld.

$ cd <host-path> && ls -la && git log -1 --format=%H 2>/dev/null; cat README.md 2>/dev/null | head -300
exit: 0
 `version` (version compatibility) and `verdict`
(signature verification). The levels are `core` and `connect`; a `trust` level is reserved and has no vectors yet.

## What is normative

The JSON Schemas, the registries and the vectors define the protocol. The Python checker is a reference implementation
of the vectors, not a second source of truth. When they disagree, the vectors win and the checker is wrong.

- Each schema describes one minor version exactly. Inside that version an unknown field is invalid, and `ext` is the
  place for extensions. A reader that supports `1.m` accepts documents from `1.0` to `1.m`, each against its own schema.
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