All ChatGPT created, I just was scrivener and Feerless Leader.

data/assumptions.json

@@ -0,0 +1,33 @@
+{
+  "currency": "USD",
+  "waste_factor": 1.15,
+  "electricity_cost_per_kwh": 0.12,
+  "printer_average_watts": 120,
+  "print_hours_per_box": 8.0,
+  "target_box_counts": [1, 4, 12],
+  "printed_materials": [
+    {
+      "id": "petg",
+      "name": "PETG",
+      "cost_per_kg": 22.00,
+      "grams_per_box": 220
+    },
+    {
+      "id": "asa",
+      "name": "ASA",
+      "cost_per_kg": 28.00,
+      "grams_per_box": 90
+    },
+    {
+      "id": "tpu",
+      "name": "TPU",
+      "cost_per_kg": 26.00,
+      "grams_per_box": 20
+    }
+  ],
+  "notes": [
+    "Printed weights are initial estimates and should later be replaced with slicer-derived actuals.",
+    "Waste factor is applied to printed material cost only.",
+    "Electricity uses printer_average_watts multiplied by print_hours_per_box."
+  ]
+}

data/bom.json

@@ -0,0 +1,85 @@
+{
+  "project_name": "Filament Drybox Cost Model",
+  "source_model": "Filament Storage 2026 by GunplaMark",
+  "source_url": "https://www.printables.com/",
+  "currency": "USD",
+  "components": [
+    {
+      "id": "container",
+      "name": "4L cereal container",
+      "category": "hardware",
+      "unit_type": "each",
+      "pack_qty": 4,
+      "pack_cost": 39.99,
+      "units_used_per_box": 1,
+      "optional": false,
+      "notes": "Praki, Wildone, or Skroam style 4L container"
+    },
+    {
+      "id": "bearing",
+      "name": "608 bearing",
+      "category": "hardware",
+      "unit_type": "each",
+      "pack_qty": 10,
+      "pack_cost": 11.99,
+      "units_used_per_box": 4,
+      "optional": false,
+      "notes": "Open, ungreased fidget-spinner style bearings"
+    },
+    {
+      "id": "badge_reel",
+      "name": "badge reel",
+      "category": "hardware",
+      "unit_type": "each",
+      "pack_qty": 10,
+      "pack_cost": 14.99,
+      "units_used_per_box": 1,
+      "optional": false,
+      "notes": "Used to harvest spring"
+    },
+    {
+      "id": "foam_cord",
+      "name": "3mm silicone foam cord",
+      "category": "consumable",
+      "unit_type": "meter",
+      "pack_qty": 10,
+      "pack_cost": 9.99,
+      "units_used_per_box": 0.70,
+      "optional": false,
+      "notes": "Length per box is an estimate; measure actual lid circumference"
+    },
+    {
+      "id": "desiccant",
+      "name": "activated alumina desiccant",
+      "category": "consumable",
+      "unit_type": "gram",
+      "pack_qty": 2000,
+      "pack_cost": 24.99,
+      "units_used_per_box": 150,
+      "optional": false,
+      "notes": "Silica gel could be modeled as an alternative later"
+    },
+    {
+      "id": "hygrometer",
+      "name": "rectangular hygrometer",
+      "category": "hardware",
+      "unit_type": "each",
+      "pack_qty": 4,
+      "pack_cost": 17.99,
+      "units_used_per_box": 1,
+      "optional": false,
+      "notes": "Common small rectangular hygrometer"
+    },
+    {
+      "id": "nfc_tag",
+      "name": "25mm NFC tag",
+      "category": "optional",
+      "unit_type": "each",
+      "pack_qty": 20,
+      "pack_cost": 9.99,
+      "units_used_per_box": 1,
+      "optional": true,
+      "notes": "Optional spool identification tag"
+    }
+  ]
+}