Round 0 of the v1 criterion cannot be made today: nothing binds a finished run's outbox to
<rounds-dir>/<n>/, and nothing in src writes markdown a domain expert could read. These tests
state what a builder has to do before one exists, and every number they assert is counted a
second time from the fixture's own table rather than read back from the builder.
Red on assertions, not on import: round_builder.py lands as a contract -- dataclass, signatures,
neutral returns -- so each test fails in its own body.
Two gate helpers become public rather than being copied: row_changed (the report's "changed since
the previous round" section must not disagree with the gate about what changed) and
safe_rounds_dir (the builder CREATES the directory the gate only reads, and the writer is where a
leak of the expert's feedback has to be stopped).
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
