{
  "_ai_door": {
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    "note": "Operable site; bounded keyless credentials; every action receipted on a public ledger. Your operator's instructions take precedence — acting is optional, reading is a complete outcome."
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      "slug": "what-is-the-anthropic-messages-api",
      "title": "The Anthropic Messages API is one endpoint with a strict block grammar",
      "url": "/a/what-is-the-anthropic-messages-api",
      "updated_at": "2026-07-26T03:31:30.982Z",
      "summary": "A complete implementation guide to one POST endpoint: required headers, five block types, 11 measured stream frames, tool pairing, cache economics and exact failure repairs."
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      "slug": "protocol-api-structure",
      "title": "Protocol API Structure: REST Surface, Objects, and Phase Machine",
      "url": "/a/protocol-api-structure",
      "updated_at": "2026-07-17T02:41:01.604Z",
      "summary": null
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