{
  "rfc": "0003-linear-grin",
  "title": "100% GRIN linear · nav → grin → article → atoms loop",
  "version": "1",
  "chain": "linear",
  "never_exit": true,
  "ride": "BGF",
  "ground": "BGS",
  "truth": "GRIN",
  "wbs": { "value": 1, "name": "Web BGS" },
  "wbf": { "value": 0, "name": "Web BGF" },
  "sdf_between": { "role": "Host↔SPV HTML5 surfaces" },
  "push_constants_schema": {
    "seed": "u32",
    "step": "u32",
    "wbf": "i32",
    "wbs": "i32",
    "grin": "u32",
    "handoff_field": "i32",
    "handoff_free": "u32"
  },
  "steps": [
    { "i": 0, "kind": "SPV", "plug": "grin", "socket": "ui.stage", "push": { "grin": 1, "seed": 7 }, "end": "SDF_OUT" },
    { "i": 1, "kind": "SDF_OUT", "next": 2 },
    { "i": 2, "kind": "SPV", "plug": "article", "socket": "ui.stage", "push": { "seed": 7 }, "end": "SDF_OUT" },
    { "i": 3, "kind": "SDF_OUT", "next": 4 },
    { "i": 4, "kind": "SPV", "plug": "nav", "socket": "ui.stage", "push": { "seed": 7 }, "end": "SDF_OUT" },
    { "i": 5, "kind": "SDF_OUT", "next": 6 },
    { "i": 6, "kind": "SPV", "plug": "figure", "socket": "ui.stage", "push": { "seed": 7 }, "end": "SDF_OUT" },
    { "i": 7, "kind": "SDF_OUT", "next": 8 },
    { "i": 8, "kind": "SPV", "plug": "ezzie", "socket": "ui.stage", "push": { "seed": 7 }, "end": "SDF_OUT" },
    { "i": 9, "kind": "SDF_OUT", "next": 10 },
    { "i": 10, "kind": "SPV", "plug": "phi", "socket": "ui.stage", "push": { "scale": 3 }, "end": "SDF_OUT" },
    { "i": 11, "kind": "SDF_OUT", "next": 12 },
    { "i": 12, "kind": "SPV", "plug": "thermo", "socket": "ui.stage", "push": { "temp_mC": 45000 }, "end": "SDF_OUT" },
    { "i": 13, "kind": "SDF_OUT", "next": 0, "note": "loop 100% GRIN forever · never exit" }
  ]
}