1 commit

Author	SHA1	Message	Date
Dmitry Kokorin	4feff7a0f7	ISBN validation (58 ISBNs): tools/isbnval.py + data/isbn-validation.tsv; SUMMARY Table 4 + fixed 2 bad-check-digit typos and 2 publisher-prefix mismatches; AGENTS.md source 21	2026-09-16 00:01:13 +03:00