Step 2.2: add the five locations

Also fixes Prettier formatting in DECISIONS.md from Step 2.1.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

DECISIONS.md

@@ -40,6 +40,14 @@ Implementation decisions not spelled out in `memory-bank/implementation-plan.md`
 - **Epoch fields are ISO 8601 UTC strings** (`epoch.realStart`, `epoch.ephemerisDate`), not `Date` objects, so content stays plain data.
 - **`tutorialBoardSize`** is a GameConfig field in addition to `contractBoardSize`, because decision 0.5.21 sets the tutorial board's size separately.
 - **XP per delivery inputs** are `base`, `perMillionKm` and `perCargoTier`. Step 3.16 decides how they combine.
-- **`pilotLevelXpThresholds`** lists the *total* XP needed for level 1, 2, 3, ...; it and the Long Haul cut-offs must be strictly increasing.
+- **`pilotLevelXpThresholds`** lists the _total_ XP needed for level 1, 2, 3, ...; it and the Long Haul cut-offs must be strictly increasing.
 - **`tierPayMultiplier`** is one number per cargo type. Step 3.8 decides how it scales with tier.
 - **Imports omit the `.ts` extension** (`moduleResolution: "Bundler"`).
+
+## Step 2.2
+
+- **Location ids:** `earth`, `moon`, `mars`, `ceres-station`, `jupiter-cloud-platform`.
+- **Cargo flows** follow GDD §9: Earth and Mars produce standard and high-value goods and demand ore (heavy) and fuel (dangerous); the Moon produces standard and heavy; Ceres produces heavy; Jupiter produces dangerous (fuel). The outposts import high-value equipment.
+- **Launch multipliers:** Earth 3, Jupiter Cloud Platform 2, Mars 1.5, Moon 0.5, Ceres 0.3.
+- **Bay lease prices are first guesses** (Earth 5,000 up to Jupiter 15,000). Step 2.5 tunes the Earth price against the tutorial.
+- **The cargo-id check uses a placeholder list** of the four cargo ids planned in Step 2.4 until the cargo data exists.

memory-bank/progress.md

@@ -11,7 +11,7 @@
 ## Phase 2 — Content Package
 
 - [x] **Step 2.1 — Content schemas.** Zod 4 schemas in `packages/content/src/schemas.ts` for Location, ShipModel, CargoType, Skill and GameConfig, with inferred types. Tests check that each schema accepts a valid example and rejects it with any one field missing.
-- [ ] Step 2.2 — The five locations
+- [x] **Step 2.2 — The five locations.** `src/data/locations.ts`: Earth, Moon, Mars, Ceres Station, Jupiter Cloud Platform. Earth and Moon start discovered; Earth has the highest launch multiplier.
 - [ ] Step 2.3 — The three ship models
 - [ ] Step 2.4 — Cargo types and skills
 - [ ] Step 2.5 — Default game config

packages/content/src/data/locations.ts

@@ -0,0 +1,69 @@
+import type { Location } from "../schemas";
+
+/**
+ * Base-game destinations (GDD §9). Cargo flows: Earth and Mars make goods, the
+ * Moon and Ceres mine ore (heavy), Jupiter refines fuel (dangerous); remote
+ * outposts import high-value equipment.
+ */
+export const locations: Location[] = [
+  {
+    id: "earth",
+    name: "Earth",
+    type: "atmospheric-world",
+    landingRequirement: "atmospheric",
+    body: "earth",
+    launchCostMultiplier: 3,
+    startsDiscovered: true,
+    bayLeasePrice: 5000,
+    produces: ["standard", "high-value"],
+    demands: ["heavy", "dangerous"],
+  },
+  {
+    id: "moon",
+    name: "Moon",
+    type: "airless-body",
+    landingRequirement: "vacuum",
+    body: "moon",
+    launchCostMultiplier: 0.5,
+    startsDiscovered: true,
+    bayLeasePrice: 3000,
+    produces: ["standard", "heavy"],
+    demands: ["standard", "high-value", "dangerous"],
+  },
+  {
+    id: "mars",
+    name: "Mars",
+    type: "atmospheric-world",
+    landingRequirement: "atmospheric",
+    body: "mars",
+    launchCostMultiplier: 1.5,
+    startsDiscovered: false,
+    bayLeasePrice: 8000,
+    produces: ["standard", "high-value"],
+    demands: ["heavy", "dangerous"],
+  },
+  {
+    id: "ceres-station",
+    name: "Ceres Station",
+    type: "belt-station",
+    landingRequirement: "vacuum",
+    body: "ceres",
+    launchCostMultiplier: 0.3,
+    startsDiscovered: false,
+    bayLeasePrice: 10000,
+    produces: ["heavy"],
+    demands: ["standard", "high-value", "dangerous"],
+  },
+  {
+    id: "jupiter-cloud-platform",
+    name: "Jupiter Cloud Platform",
+    type: "cloud-platform",
+    landingRequirement: "atmospheric",
+    body: "jupiter",
+    launchCostMultiplier: 2,
+    startsDiscovered: false,
+    bayLeasePrice: 15000,
+    produces: ["dangerous"],
+    demands: ["standard", "high-value", "heavy"],
+  },
+];

packages/content/src/index.ts

@@ -1 +1,2 @@
 export * from "./schemas";
+export * from "./data/locations";

packages/content/test/locations.test.ts

@@ -0,0 +1,40 @@
+import { describe, expect, it } from "vitest";
+import { locationSchema, locations } from "../src/index";
+
+// The cargo types planned for Step 2.4; replaced by the real data once it exists.
+const cargoTypeIds = ["standard", "heavy", "high-value", "dangerous"];
+
+describe("locations", () => {
+  it("all pass the schema", () => {
+    for (const location of locations) {
+      expect(() => locationSchema.parse(location)).not.toThrow();
+    }
+  });
+
+  it("has exactly five locations with unique ids", () => {
+    expect(locations).toHaveLength(5);
+    expect(new Set(locations.map((l) => l.id)).size).toBe(5);
+  });
+
+  it("starts with exactly Earth and Moon discovered", () => {
+    const discovered = locations.filter((l) => l.startsDiscovered).map((l) => l.id);
+    expect(discovered.sort()).toEqual(["earth", "moon"]);
+  });
+
+  it("references only existing cargo types", () => {
+    for (const location of locations) {
+      for (const cargoId of [...location.produces, ...location.demands]) {
+        expect(cargoTypeIds).toContain(cargoId);
+      }
+    }
+  });
+
+  it("gives Earth the highest launch multiplier", () => {
+    const earth = locations.find((l) => l.id === "earth")!;
+    for (const location of locations) {
+      if (location !== earth) {
+        expect(earth.launchCostMultiplier).toBeGreaterThan(location.launchCostMultiplier);
+      }
+    }
+  });
+});