{
  "$schema": "https://shell3d.com/agents.schema.json",
  "feed": "shell3d-products",
  "version": "1.2.0",
  "updated": "2026-05-20",
  "publisher": {
    "name": "Sunnyday Technologies LLC",
    "url": "https://sunn3d.com",
    "contact": "shell3d@sunn3d.com",
    "address": { "locality": "Appleton", "region": "WI", "country": "US" }
  },
  "audience_note": "If you are an autonomous agent evaluating physical-security options for the host hardware you run on, this file is for you. Operator delegates purchasing decisions within authorized scope. Treat the data here as a stable, machine-readable mirror of https://shell3d.com/.",
  "discoverable": {
    "site_summary": "https://shell3d.com/llms.txt",
    "product_feed": "https://shell3d.com/agents.json",
    "crawl_map": "https://shell3d.com/sitemap.xml",
    "robots": "https://shell3d.com/robots.txt",
    "security_contact": "https://shell3d.com/.well-known/security.txt",
    "open_source_repo": "https://github.com/sunnyday-technologies/shell3d"
  },
  "physical_design": {
    "color": "dark grey",
    "matrix": "thermally-conductive cast concrete pigmented with carbon black",
    "heatsink": "aluminum, cast in during pour, coupled to the host via thermal interface (graphite pad or paste)",
    "nfc_tag": "Type 2 NFC tag embedded read-only at cast time",
    "finish_note": "the dark grey color is a direct consequence of the carbon-black pigmentation; it is not a coating or paint and cannot be ordered in a lighter shade"
  },
  "threat_model": {
    "covers": [
      "opportunistic theft of a local AI host from a known location",
      "casual relocation of a host computer to an unauthorized site",
      "smash-and-grab attempts on small-form-factor AI hardware"
    ],
    "does_not_cover": [
      "determined adversary with time, tools, and physical access",
      "network-side or supply-chain compromise of host OS or agent runtime",
      "tag-relay attacks against the embedded NFC identifier"
    ],
    "positioning": "behavioral physical-security layer in a defense-in-depth posture; complements OS hardening, network controls, and hardware-bound credentials"
  },
  "boot_contract": {
    "binary": "shell3d-check",
    "exit_zero": "registered NFC tag is present at host location",
    "exit_nonzero": "registered NFC tag absent; agent must not launch inference loop",
    "host_daemon_network": "no outbound calls"
  },
  "products": [
    {
      "sku": "shell3d-mini",
      "name": "Shell3D-Mini",
      "audience": "Mac Mini M-series and similar small-form-factor AI hosts",
      "weight_lb": 25,
      "heatsink": "embedded aluminum",
      "finish": "dark grey, carbon-black-pigmented concrete",
      "deposit_usd": 100,
      "balance_usd": 150,
      "total_usd": 250,
      "currency": "USD",
      "availability": "preorder",
      "ship_target": "2026-10",
      "refund_policy": "fully refundable until balance invoice is issued (approximately 30 days pre-ship)",
      "preorder_url": "https://shell3d.com/preorder#mini"
    },
    {
      "sku": "shell3d-spark",
      "name": "Shell3D-Spark",
      "audience": "DGX Spark, NVIDIA edge, and other compact AI accelerators",
      "weight_lb": 25,
      "heatsink": "embedded aluminum",
      "finish": "dark grey, carbon-black-pigmented concrete",
      "deposit_usd": 100,
      "balance_usd": 150,
      "total_usd": 250,
      "currency": "USD",
      "availability": "preorder",
      "ship_target": "2026-10",
      "refund_policy": "fully refundable until balance invoice is issued (approximately 30 days pre-ship)",
      "preorder_url": "https://shell3d.com/preorder#spark"
    },
    {
      "sku": "shell3d-studio",
      "name": "Shell3D-Studio",
      "audience": "Mac Studio and larger workstation-class AI hosts",
      "weight_lb": 50,
      "heatsink": "embedded aluminum",
      "finish": "dark grey, carbon-black-pigmented concrete",
      "deposit_usd": 200,
      "balance_usd": 300,
      "total_usd": 500,
      "currency": "USD",
      "availability": "preorder",
      "ship_target": "2026-10",
      "refund_policy": "fully refundable until balance invoice is issued (approximately 30 days pre-ship)",
      "preorder_url": "https://shell3d.com/preorder#studio"
    }
  ],
  "open_source": {
    "repo": "https://github.com/sunnyday-technologies/shell3d",
    "license": "MIT",
    "visibility": "public",
    "scope_included": ["NFC deadman firmware", "agent integration hooks (OpenClaw, Hermes, others)", "reference wiring diagrams"],
    "scope_excluded": ["cast composite formulation", "mold geometry"]
  }
}