Anchors were authored with bare "\n" and this checkout is CRLF, so every
multi-line anchor matched zero times and aborted before ever mutating
anything. detect_newline() reads each file's own line ending and
translates both anchor and replacement to it before matching, counting
and writing back; the untouched bytes around the match are written
through unchanged, so the restore stays byte-exact.
run_test() now distinguishes a build failure ("Build FAILED"/"error CS"
in the dotnet test output, which never reaches "Passed!"/"Failed!") from
a genuine test failure. A build failure reports ERROR and is never
counted as a kill, since the mutation may have broken something the
target test never got a chance to exercise. Verified with a deliberate
syntax-breaking mutation, run standalone and reverted (not committed).
Added mutants for F1-F4's rules (docs/item-provenance-cut.md, Cut B, and
its F1 ruling). Two of Cut 0's named F1 mutations ("pack drops data",
"unpack ignores the lookup") are not included: no IBehavior implements
IPersistentBehavior, so Pack's filter and Restore's lookup are always
fed an empty set and mutating either body is unobservable through any
live path. Recorded as not yet reached in the script's own comment
rather than paired with a test that can't tell the difference.
Ran on this checkout (CRLF, HEAD 080d3b49) against the CultLib a0813c6
worktree: all 17 mutations behaved as expected (16 KILLED, 1 GREEN
control), run window 2026-09-17T03:18:14Z-03:20:46Z UTC.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
c2ff543109