{
  "tool_id": "art-427-discount-window-capacity",
  "tool_version": "1.0.0",
  "display_name": "Discount Window Borrowing-Capacity Calculator",
  "mcp_name": "compute_discount_window_capacity",
  "mandate_type": "compliance_mandate",
  "wave": 63,
  "gpu": false,
  "url": "https://ainumbers.co/chaingraph/art-427-discount-window-capacity.html",
  "description": "Federal Reserve Discount Window borrowing-capacity calculator: lendable value = sum of pledged collateral positions x published Fed collateral margins (margin table effective date is caller-supplied policy input, not hardcoded) compared against a runnable-liability / uninsured-deposit coverage target. Timely given the pending Discount Window Preparedness Act and the Treasury LCR-recognition push for pre-positioned collateral; no existing vendor tool covers this calculation.",
  "input_schema_ref": "chaingraph/art-427-discount-window-capacity.html#manifest",
  "deadline": null,
  "deadline_note": "Discount Window Preparedness Act pending; Treasury LCR-recognition push for pre-positioned DW collateral.",
  "consumes": [],
  "feeds": [],
  "status": "live",
  "conformance_fixtures": true,
  "compute_capability": "server",
  "compute_images": [
    {
      "system": "sha256-source",
      "image_id": "sha256:9229d3650b52b9385576c8f0c878c174906804fb4ccca5ae197016f655fa4aea",
      "valid_from": "2026-07-10"
    },
    {
      "system": "risc0",
      "image_id": "sha256:a1a0bc89b5b1febaeda3519f6dbade0fa5ac16beeb143c4e1b01689573567bc6",
      "valid_from": "2026-07-23"
    }
  ],
  "export_capability": [
    "json"
  ],
  "compute_proof_ready": "ready",
  "compute_proof": {
    "type": "ZkVmReceipt",
    "system": "risc0",
    "receiptFormat": "groth16-bn254",
    "imageId": "sha256:a1a0bc89b5b1febaeda3519f6dbade0fa5ac16beeb143c4e1b01689573567bc6",
    "seal": "K99lkbLG8znUkABAISQ+aIaUTyKO4XhiFhl9DWxntK0qov9L4S04D825q7mcLrWxt7Kyx5xkKr0jBo7DPsRt1R9gG6gGXdrBs464DC3NkoIG6xPyiC2Uaist65+n4C5YC/0cnz1X20uzmLKPeQ1wn47jlwfliz4GNAugcICKmIgQWlD2kQCEo7Er4mNIo9VkBOKuJO+e8Lfb8g1bvQOWXCNPHx9dHbogxZ1ylnYP61llnKm44KlnksphSbX+dXXEJXIpUuz9ua1F1s2VScGc8x0+cC7k615Hq/odaqONjncv77yVQLIS0cjVJvQ5jR4ObootmE/kz9DEjCENR8HrBA==",
    "journal": {
      "chaingraph_version": "0.4.0",
      "kernel_digest": "sha256:9229d3650b52b9385576c8f0c878c174906804fb4ccca5ae197016f655fa4aea",
      "output": {
        "capacity_compliant": true,
        "capacity_surplus_shortfall_musd": 1690,
        "collateral_par_value_musd": 5000,
        "coverage_pct": 156.33,
        "coverage_target_pct": 100,
        "lendable_value_musd": 4690,
        "margin_table_version": "2026-07-01",
        "note": "Lendable value = sum(collateral par value x published Fed margin, policy-input margin table). Compared against caller-supplied runnable-liability / uninsured-deposit balance. Not a claim of actual Fed collateral eligibility or advance approval.",
        "runnable_liabilities_musd": 3000
      }
    }
  }
}