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The "issn" topic on GitHub groups 1 open-source project in the DeepSeek Harness (DSH) ecosystem, led by dsh-checkdigit with 1 GitHub stars. dsh-checkdigit — Check-digit mathematics toolbox for DeepSeek Harness (dsh): generate, validate, repair and detect check digits for 15 schemes (Luhn, Verhoeff, Damm, ISBN, EAN, UPC, GTIN-14, ISSN, ISIN, CUSIP, IBAN, CAS, ABA) plus ISBN-10/13 conversion and a single-edit repair search — zero runtime dependencies. Every project here is indexed by DSH Universe with live GitHub data — stars, activity and install status — so you can compare and install directly.
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TYEclipse
Check-digit mathematics toolbox for DeepSeek Harness (dsh): generate, validate, repair and detect check digits for 15 schemes (Luhn, Verhoeff, Damm, ISBN, EAN, UPC, GTIN-14, ISSN, ISIN, CUSIP, IBAN, CAS, ABA) plus ISBN-10/13 conversion and a single-edit repair search — zero runtime dependencies