{
  "_readme": [
    "Currency registry for Currency Systems (docs/wiki/economy/currency.md).",
    "Owner-edited tuning data. Faucet/sink entries are lists of shape, not",
    "rates — rates land here when their content sessions run. Entries marked",
    "illustrative:true are placeholders for shape, not commitments.",
    "Deferred slots are reserved names — no mechanics until their owning",
    "design session (D-CURRENCY-01)."
  ],
  "currencies": [
    {
      "id": "coins",
      "name": "Coins",
      "form": "balance",
      "tradeable": true,
      "faucets": [
        { "source": "npc_buy_floor", "note": "town merchants buy player goods at floor price", "illustrative": true },
        { "source": "quest_rewards", "note": "reserved until quest session", "illustrative": true }
      ],
      "sinks": [
        { "sink": "npc_shop_purchases", "illustrative": true },
        { "sink": "market_tent_rent", "illustrative": true },
        { "sink": "featured_slot_fees", "illustrative": true },
        { "sink": "service_costs", "illustrative": true }
      ]
    },
    {
      "id": "mobcoins",
      "name": "MobCoins",
      "form": "balance",
      "tradeable": false,
      "withdrawable": {
        "item": "bounty_note",
        "tradeable": true,
        "withdrawal_fee": 0,
        "denominations": { "shape": "fixed", "values": null },
        "note": "free withdrawal + fixed denominations ratified (D-CURRENCY-06); denomination values owner-tuned, TBD"
      },
      "faucets": [
        {
          "source": "creature_kills",
          "mechanics": {
            "drop_chance": 0.4,
            "amount_per_success": 1,
            "rolls": "island_tier_ordinal",
            "note": "owner default 2026-07-16: chance rolled once per island tier of the kill's island — T1 one roll, T2 two, T3 three... (binomial per kill; tiers per data/world-islands.json). Adventure islands only: personal/guild mob farms are not planned (owner 2026-07-16) — needs a new ruling if that ever changes"
          }
        },
        { "source": "boss_kills", "illustrative": true },
        { "source": "combat_milestones", "illustrative": true }
      ],
      "sinks": [
        { "sink": "mobcoin_shop", "note": "cosmetics/collectibles/keys/QoL free; speed via rate hooks only (D-CURRENCY-04)" }
      ]
    },
    {
      "id": "prestige_currency",
      "name": "Prestige currency",
      "form": "balance",
      "tradeable": false,
      "faucets": [
        { "source": "prestige_action", "note": "sole mint — ratified canon, not tunable here" }
      ],
      "sinks": [
        { "sink": "prestige_rewards", "note": "cosmetic glory only — never power", "illustrative": true }
      ]
    }
  ],
  "item_currencies": [
    {
      "id": "life_essence",
      "name": "Life Essence",
      "form": "item",
      "tradeable": true,
      "droppable_on_death": true,
      "note": "resolved by mastery session (D-CURRENCY-07): fuels Eternal Nodes; sole death-drop exception (vision amendment 2026-07-16); drop sources land in owner content passes"
    }
  ],
  "deferred": [
    { "slot": "eternal_crystals", "owning_session": "dungeons-enchanting", "note": "material, not currency (D-CURRENCY-01)" }
  ],
  "resolved_slots": [
    { "slot": "mastery_points", "resolution": "per-skill bound tree points — not a currency (D-CURRENCY-07); tuning in data/skill-trees.json" },
    { "slot": "life_essence", "resolution": "item currency above (D-CURRENCY-07)" },
    { "slot": "event_currency", "resolution": "bound balance, event-shop-only (D-CURRENCY-08); tuning in data/events-world.json" }
  ]
}