{
 "_": "THE CHANGELOG of the byrd@home content model and its public feed (/changelog.json): one entry per release, by version and date (the date of the commit that published it), naming every ID added, changed or withdrawn.  Written by bin/register-ids.mjs; checked by bin/prove-model.mjs.  An ID is never reused or renumbered; a withdrawn ID is never published again.",
 "entries": [
  {
   "version": "1.0.0",
   "date": "2026-10-03",
   "note": "STEM for home: the content model and its feed, /items.json, with the seven byrd@home lessons as its first items and three simulations inside them.",
   "added": [
    "BH-0001",
    "BH-0002",
    "BH-0003",
    "BH-0004",
    "BH-0005",
    "BH-0006",
    "BH-0007"
   ],
   "changed": [],
   "withdrawn": []
  },
  {
   "version": "2.0.0",
   "date": "2026-10-03",
   "note": "The Byrd Academy STEM and AI curricula (overviews and seventy-three units), home activities drawn from them, the Nest cards for ages zero to five checked for safety, the access guide, the career lanes, simulations and visualizations as items of their own, and family printables; the lessons gain next steps and their simulations move to their own items.",
   "added": [
    "SIM-0001",
    "SIM-0002",
    "SIM-0003",
    "SIM-0004",
    "SIM-0005",
    "BH-0009",
    "BH-0010",
    "BH-0011",
    "BH-0012",
    "BH-0013",
    "BH-0014",
    "BH-0015",
    "BH-0016",
    "BH-0017",
    "BH-0018",
    "BH-0019",
    "BH-0020",
    "BH-0021",
    "BH-0022",
    "BH-0023",
    "BH-0024",
    "BH-0025",
    "BH-0026",
    "BH-0027",
    "BH-0028",
    "BH-0029",
    "BH-0030",
    "SIM-0006",
    "SIM-0007",
    "SIM-0008",
    "SIM-0009",
    "SIM-0010",
    "SIM-0011",
    "SIM-0012",
    "SIM-0013",
    "PRINT-0001",
    "PRINT-0002",
    "PRINT-0003",
    "PRINT-0004",
    "PRINT-0005",
    "PRINT-0006",
    "PRINT-0007",
    "CUR-STEM",
    "CUR-AI",
    "STEM-ES-01",
    "STEM-ES-02",
    "STEM-ES-03",
    "STEM-ES-04",
    "STEM-ES-05",
    "STEM-ES-06",
    "STEM-ES-07",
    "STEM-ES-08",
    "STEM-ES-09",
    "STEM-ES-10",
    "STEM-ES-11",
    "STEM-ES-12",
    "STEM-FX-01",
    "STEM-JH-01",
    "STEM-JH-02",
    "STEM-JH-03",
    "STEM-JH-04",
    "STEM-JH-05",
    "STEM-JH-06",
    "STEM-JH-07",
    "STEM-JH-08",
    "STEM-JH-09",
    "STEM-JH-10",
    "STEM-JH-11",
    "STEM-JH-12",
    "STEM-HS-01",
    "STEM-HS-02",
    "STEM-HS-03",
    "STEM-HS-04",
    "STEM-HS-05",
    "STEM-HS-06",
    "STEM-HS-07",
    "STEM-HS-08",
    "STEM-HS-09",
    "STEM-HS-10",
    "STEM-HS-11",
    "STEM-HS-12",
    "AI-ES-01",
    "AI-ES-02",
    "AI-ES-03",
    "AI-ES-04",
    "AI-ES-05",
    "AI-ES-06",
    "AI-ES-07",
    "AI-ES-08",
    "AI-ES-09",
    "AI-ES-10",
    "AI-ES-11",
    "AI-ES-12",
    "AI-JH-01",
    "AI-JH-02",
    "AI-JH-03",
    "AI-JH-04",
    "AI-JH-05",
    "AI-JH-06",
    "AI-JH-07",
    "AI-JH-08",
    "AI-JH-09",
    "AI-JH-10",
    "AI-JH-11",
    "AI-JH-12",
    "AI-HS-01",
    "AI-HS-02",
    "AI-HS-03",
    "AI-HS-04",
    "AI-HS-05",
    "AI-HS-06",
    "AI-HS-07",
    "AI-HS-08",
    "AI-HS-09",
    "AI-HS-10",
    "AI-HS-11",
    "AI-HS-12",
    "GUIDE-0001",
    "PATH-0001",
    "PATH-0002",
    "PATH-0003",
    "PATH-0004",
    "PATH-0005",
    "PATH-0006",
    "PATH-0007",
    "PATH-0008",
    "CUR-NEST",
    "NEST-HA-01",
    "NEST-HA-02",
    "NEST-HA-03",
    "NEST-HA-04",
    "NEST-HA-05",
    "NEST-HA-06",
    "NEST-HA-07",
    "NEST-HA-08",
    "NEST-HA-09",
    "NEST-HA-10",
    "NEST-HA-11",
    "NEST-HA-12",
    "NEST-HA-13",
    "NEST-HA-14",
    "NEST-HA-15",
    "NEST-HA-16",
    "NEST-HA-17",
    "NEST-HA-18",
    "NEST-HA-19",
    "NEST-HA-20",
    "NEST-HA-21",
    "NEST-HA-22",
    "NEST-HA-23",
    "NEST-HA-24",
    "NEST-HA-25",
    "NEST-HA-26",
    "NEST-HA-27",
    "NEST-HA-28",
    "NEST-HA-29",
    "NEST-HA-30",
    "NEST-HA-31",
    "NEST-HA-32",
    "NEST-HA-33",
    "NEST-HA-34",
    "NEST-HA-35",
    "NEST-HA-36",
    "NEST-HA-37",
    "NEST-HA-38",
    "NEST-HA-39",
    "NEST-HA-40",
    "NEST-NE-01",
    "NEST-NE-02",
    "NEST-NE-04",
    "NEST-NE-05",
    "NEST-NE-06",
    "NEST-NE-08",
    "NEST-NE-09",
    "NEST-NE-10",
    "NEST-NE-11",
    "NEST-NE-12",
    "NEST-NE-13",
    "NEST-NE-14",
    "NEST-NE-15",
    "NEST-NE-16",
    "NEST-NE-17",
    "NEST-NE-18",
    "NEST-NE-19",
    "NEST-NE-20",
    "NEST-NE-21",
    "NEST-NE-22",
    "NEST-NE-23",
    "NEST-NE-24",
    "NEST-NE-25",
    "NEST-NE-26",
    "NEST-NE-27",
    "NEST-NE-28",
    "NEST-NE-29",
    "NEST-NE-30",
    "NEST-NE-31",
    "NEST-NE-32",
    "NEST-NE-33",
    "NEST-NE-34",
    "NEST-NE-35",
    "NEST-NE-36",
    "NEST-NE-37",
    "NEST-NE-39",
    "NEST-NE-40",
    "NEST-BR-01",
    "NEST-BR-02",
    "NEST-BR-03",
    "NEST-BR-04",
    "NEST-BR-05",
    "NEST-BR-06",
    "NEST-BR-07",
    "NEST-BR-08",
    "NEST-BR-09",
    "NEST-BR-10",
    "NEST-BR-11",
    "NEST-BR-12",
    "NEST-BR-13",
    "NEST-BR-14",
    "NEST-BR-15",
    "NEST-BR-16",
    "NEST-BR-17",
    "NEST-BR-18",
    "NEST-BR-19",
    "NEST-BR-20",
    "NEST-BR-21",
    "NEST-BR-22",
    "NEST-BR-23",
    "NEST-BR-24",
    "NEST-BR-25",
    "NEST-BR-26",
    "NEST-BR-27",
    "NEST-BR-28",
    "NEST-BR-29",
    "NEST-BR-30",
    "NEST-BR-31",
    "NEST-BR-32",
    "NEST-BR-33",
    "NEST-BR-34",
    "NEST-BR-35",
    "NEST-BR-36",
    "NEST-BR-37",
    "NEST-BR-38",
    "NEST-BR-39",
    "NEST-BR-40",
    "NEST-FL-01",
    "NEST-FL-02",
    "NEST-FL-03",
    "NEST-FL-04",
    "NEST-FL-05",
    "NEST-FL-06",
    "NEST-FL-07",
    "NEST-FL-08",
    "NEST-FL-09",
    "NEST-FL-10",
    "NEST-FL-11",
    "NEST-FL-12",
    "NEST-FL-13",
    "NEST-FL-14",
    "NEST-FL-15",
    "NEST-FL-16",
    "NEST-FL-17",
    "NEST-FL-18",
    "NEST-FL-19",
    "NEST-FL-20",
    "NEST-FL-21",
    "NEST-FL-22",
    "NEST-FL-23",
    "NEST-FL-24",
    "NEST-FL-25",
    "NEST-FL-26",
    "NEST-FL-27",
    "NEST-FL-28",
    "NEST-FL-29",
    "NEST-FL-30",
    "NEST-FL-31",
    "NEST-FL-32",
    "NEST-FL-33",
    "NEST-FL-34",
    "NEST-FL-35",
    "NEST-FL-36",
    "NEST-FL-37",
    "NEST-FL-38",
    "NEST-FL-39",
    "NEST-FL-40",
    "NEST-FF-01",
    "NEST-FF-02",
    "NEST-FF-03",
    "NEST-FF-04",
    "NEST-FF-05",
    "NEST-FF-06",
    "NEST-FF-07",
    "NEST-FF-08",
    "NEST-FF-09",
    "NEST-FF-10",
    "NEST-FF-11",
    "NEST-FF-12",
    "NEST-FF-13",
    "NEST-FF-14",
    "NEST-FF-15",
    "NEST-FF-16",
    "NEST-FF-17",
    "NEST-FF-18",
    "NEST-FF-19",
    "NEST-FF-20",
    "NEST-FF-21",
    "NEST-FF-22",
    "NEST-FF-23",
    "NEST-FF-24",
    "NEST-FF-25",
    "NEST-FF-26",
    "NEST-FF-27",
    "NEST-FF-28",
    "NEST-FF-29",
    "NEST-FF-30",
    "NEST-FF-31",
    "NEST-FF-32",
    "NEST-FF-33",
    "NEST-FF-34",
    "NEST-FF-35",
    "NEST-FF-36",
    "NEST-FF-37",
    "NEST-FF-38",
    "NEST-FF-39",
    "NEST-FF-40"
   ],
   "changed": [
    "BH-0001",
    "BH-0002",
    "BH-0003",
    "BH-0004",
    "BH-0005",
    "BH-0006",
    "BH-0007"
   ],
   "withdrawn": []
  },
  {
   "version": "2.0.1",
   "date": "2026-10-03",
   "note": "The Nest overview counts its cards truly: nearly two hundred (there are 197), where it said two hundred.",
   "added": [],
   "changed": [
    "CUR-NEST"
   ],
   "withdrawn": []
  },
  {
   "version": "2.1.0",
   "date": "2026-10-04",
   "note": "Every simulation raised onto one shared kit, each with a topic and a challenge it checks, and seventeen new simulations and visualizations: sink or float, levers, a pendulum, gears, light and paint, magnets, volts and amps, states of matter, the water cycle, a food web, orbits, the Moon's phases, a water rocket, bits and pixels, heat on the move, a cabbage indicator and dice.",
   "added": [
    "SIM-0014",
    "SIM-0015",
    "SIM-0016",
    "SIM-0017",
    "SIM-0018",
    "SIM-0019",
    "SIM-0020",
    "SIM-0021",
    "SIM-0022",
    "SIM-0023",
    "SIM-0024",
    "SIM-0025",
    "SIM-0026",
    "SIM-0027",
    "SIM-0028",
    "SIM-0029",
    "SIM-0030"
   ],
   "changed": [
    "SIM-0001",
    "SIM-0002",
    "SIM-0003",
    "SIM-0004",
    "SIM-0005",
    "SIM-0006",
    "SIM-0007",
    "SIM-0008",
    "SIM-0009",
    "SIM-0010",
    "SIM-0011",
    "SIM-0012",
    "SIM-0013"
   ],
   "withdrawn": []
  },
  {
   "version": "2.2.0",
   "date": "2026-10-04",
   "note": "Virtual tours, a new kind of item: ten illustrated tours (inside a circuit, a phone, a computer and a car, out to space, the deep sea, pipelines, the power grid, water treatment and inside a 3D printer), each stop a drawing with the parts to look for, a short true explanation, something to try at home and the public source of its facts; the items the tours go with gain them in their next steps.",
   "added": [
    "TOUR-0001",
    "TOUR-0002",
    "TOUR-0003",
    "TOUR-0004",
    "TOUR-0005",
    "TOUR-0006",
    "TOUR-0007",
    "TOUR-0008",
    "TOUR-0009",
    "TOUR-0010"
   ],
   "changed": [
    "BH-0001",
    "BH-0002",
    "SIM-0001",
    "BH-0011",
    "BH-0012",
    "SIM-0006",
    "SIM-0007",
    "SIM-0008",
    "SIM-0009",
    "SIM-0010",
    "SIM-0012",
    "SIM-0014",
    "SIM-0017",
    "SIM-0018",
    "SIM-0019",
    "SIM-0020",
    "SIM-0022",
    "SIM-0024",
    "SIM-0025",
    "SIM-0026",
    "SIM-0027",
    "SIM-0028",
    "STEM-ES-03",
    "STEM-ES-05",
    "STEM-ES-07",
    "STEM-FX-01",
    "STEM-JH-01",
    "STEM-JH-02",
    "STEM-JH-05",
    "STEM-JH-09",
    "STEM-HS-04",
    "STEM-HS-05",
    "STEM-HS-09",
    "AI-ES-03"
   ],
   "withdrawn": []
  },
  {
   "version": "2.3.0",
   "date": "2026-10-04",
   "note": "More for the hub: forty-four new home activities and eight family printables.  Sixteen activities are drawn from the curriculum's units and twenty-eight are everyday STEM written for byrd@home, twelve of them for little ones under the Nest's safety rules, each citing the public pages its science and safety come from; each activity links the simulations and tours it pairs with, those simulations and tours go with it in turn, and the tours' stops gain new things to try at home.",
   "added": [
    "BH-0031",
    "BH-0032",
    "BH-0033",
    "BH-0034",
    "BH-0035",
    "BH-0036",
    "BH-0037",
    "BH-0038",
    "BH-0039",
    "BH-0040",
    "BH-0041",
    "BH-0042",
    "BH-0043",
    "BH-0044",
    "BH-0045",
    "BH-0046",
    "BH-0047",
    "BH-0048",
    "BH-0049",
    "BH-0050",
    "BH-0051",
    "BH-0052",
    "BH-0053",
    "BH-0054",
    "BH-0055",
    "BH-0056",
    "BH-0057",
    "BH-0058",
    "BH-0059",
    "BH-0060",
    "BH-0061",
    "BH-0062",
    "BH-0063",
    "BH-0064",
    "BH-0065",
    "BH-0066",
    "BH-0067",
    "BH-0068",
    "BH-0069",
    "BH-0070",
    "BH-0071",
    "BH-0072",
    "BH-0073",
    "BH-0074",
    "PRINT-0008",
    "PRINT-0009",
    "PRINT-0010",
    "PRINT-0011",
    "PRINT-0012",
    "PRINT-0013",
    "PRINT-0014",
    "PRINT-0015"
   ],
   "changed": [
    "SIM-0004",
    "SIM-0006",
    "SIM-0009",
    "SIM-0010",
    "SIM-0011",
    "SIM-0014",
    "SIM-0015",
    "SIM-0016",
    "SIM-0017",
    "SIM-0018",
    "SIM-0019",
    "SIM-0020",
    "SIM-0021",
    "SIM-0022",
    "SIM-0023",
    "SIM-0025",
    "SIM-0026",
    "SIM-0027",
    "SIM-0028",
    "SIM-0029",
    "SIM-0030",
    "TOUR-0001",
    "TOUR-0002",
    "TOUR-0003",
    "TOUR-0004",
    "TOUR-0005",
    "TOUR-0006",
    "TOUR-0007",
    "TOUR-0008",
    "TOUR-0009",
    "TOUR-0010"
   ],
   "withdrawn": []
  },
  {
   "version": "2.4.0",
   "date": "2026-10-04",
   "note": "Every drawing true and looked at: the ten tours' stops and the thirty simulations' stills and live states redrawn where a drawing was untrue (a hand holding its own finger, people drawn wrong, parts joined to nothing, things floating, facts and labels out of place), their words matched to the drawings; no proof line or date where a date is not the point; Byrd EDU kept one word.",
   "added": [],
   "changed": [
    "SIM-0001",
    "SIM-0002",
    "SIM-0003",
    "SIM-0004",
    "SIM-0005",
    "SIM-0006",
    "SIM-0007",
    "SIM-0008",
    "SIM-0012",
    "SIM-0014",
    "SIM-0015",
    "SIM-0016",
    "SIM-0018",
    "SIM-0019",
    "SIM-0020",
    "SIM-0021",
    "SIM-0022",
    "SIM-0026",
    "SIM-0027",
    "SIM-0029",
    "TOUR-0001",
    "TOUR-0002",
    "TOUR-0003",
    "TOUR-0004",
    "TOUR-0005",
    "TOUR-0006",
    "TOUR-0007",
    "TOUR-0008",
    "TOUR-0009",
    "TOUR-0010"
   ],
   "withdrawn": []
  },
  {
   "version": "2.5.0",
   "date": "2026-10-04",
   "note": "Three or more simulations on every shelf: five new simulations, each with the home activity it belongs to: a marble coaster (energy), a tower that tips in the wind (design), yeast filling a balloon (life), the biggest pen from one fence and a tall thing measured by its shadow (math); three curriculum units gain a simulation.",
   "added": [
    "BH-0075",
    "BH-0076",
    "BH-0077",
    "BH-0078",
    "BH-0079",
    "SIM-0031",
    "SIM-0032",
    "SIM-0033",
    "SIM-0034",
    "SIM-0035"
   ],
   "changed": [
    "STEM-ES-01",
    "STEM-ES-02",
    "STEM-ES-10"
   ],
   "withdrawn": []
  }
 ]
}