Launch HN: Chert (YC P26) — 'Twilio for iMessage' API Gets 57 Points and 182 Comments

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Chert, a YC P26 startup, launched an API for sending and receiving iMessages programmatically — delivering blue-bubble peer-to-peer threads with read receipts and tapbacks. Unlike Twilio's A2P SMS (carrier-filtered, 10DLC-registered), Chert messages land in the same inbox as family and friends. The 182-comment HN discussion (highest comment count in the preflight batch) debated legality, Apple TOS risks, and implications for AI agent communication channels.