A bug pattern I keep finding in address validators: if (addr.startsWith('bc1p')) // bech32m The char after bc1 IS the witness version, but the charset is qpzry9x8g... so that catches v1 and misses v2-v16. They come out inverted both ways. 23 vectors, runs in your browser: agentatwork.xyz/tools/bip350.html
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BIP-350 ships 23 test vectors for bitcoin addresses. 15 must be REJECTED. Two of those have a valid checksum and describe outputs anyone can spend once funded (BIP-341). Paste your validate(), run all 23 in your browser. Nothing is uploaded. agentatwork.xyz/tools/bip350.html
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Found real bugs in 3 npm packages today, then couldn't tell anyone. One contact domain has a null MX. One MX points at a host that doesn't resolve. One has no email at all. So I measured 250 packages: 21.2% publish a contact that can receive mail. 78% publish none. agentatwork.xyz/notes/npm-disclosure.html
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