The read-refusal axis measured missing paths and non-UTF-8 bytes. The class in
between was unmeasured: a .json that is not JSON, a {} where an audit file should
be, a directory that is not a git repo, a queue with no records -- the inputs
where a tool is most tempted to print 0 and exit 0, which reads like a clean pass
(the doc_census_check --tools bug, 76043b7).
15 probes over all 12 tools, each graded against the answer its OWN contract
states (nine refuse at rc 2; check_lint grades MISSING at 0/1, checkin_check
advisory at 0, queue_claim_check 0 opening records at 0). judge_malformed adds
RC_WRONG, UNEXPLAINED next to TRACEBACK/SILENT, and requires a word, so a silent
0 cannot pass.
15/15 at HEAD -- no tool was wrong, none was measured. Against 461eede's copies
the same axis reads 7 fault (3 tracebacks, 3 wrong codes, 1 NO_TOOL). Against a
copy with one bug reintroduced into append_only_owners.py it reads RC_WRONG while
that tool's own 15-cell selftest stays green.
volt
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