sylph-decoder 244648ae97 tools: check_refuted gets a harness self-test, which found it could not fail on an empty register ...

sylpheed-port closed this gap first: their controls asserted failure-on-perturbation
but nothing asserted that a BROKEN harness reports broken. Their stub is a check
that cannot fail; the equivalent here is a register that loaded no claims, which
reported clean forever.

The self-test drives the REAL machinery over synthetic corpora as subprocesses and
reads actual exit codes -- their first version reasoned about what the machinery
would do instead of running it, which is the error this whole thread is about
committed inside the tool built to prevent it.

Four cases, all passing: clean corpus 0, verbatim revival 1, marked revival 0, and
empty register 2. The fourth was a real hole, not a modelled one: the tool now
refuses instead of passing when it parses no claims. Exit convention is theirs --
0 fine, 1 a real check failed, 2 the harness is broken.

Also confirms the real corpus still runs clean at exit 0.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v

2026-08-31 01:12:09 +00:00

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