The DL module's cells were module-level asserts: run_lane_tests.py --list
reports unittest=0 bare=0 for test_damerau_levenshtein.py, so no named case
moved when the module broke. CHECK_DL runs the shipped cells plus
oracle_dl.py, which grades a deterministic 5300-pair corpus against a BFS
over the edit graph (the definition of true DL) and proves in the same run
that the corpus reds both classic impostors (OSA, plain Levenshtein).
Measured: green on the tree (0/5228 mismatches, 42 OSA witnesses, 252 Lev
witnesses); rc 1 with named witnesses on a transposition-deleted mutant and
on an OSA module.
ledger
beam