Step 4.1: define API data shapes

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

DECISIONS.md

@@ -182,3 +182,14 @@ Implementation decisions not spelled out in `memory-bank/implementation-plan.md`
 - **Explicit public API.** `packages/sim/src/index.ts` lists every export. Internal helpers (`findLocation`, `findShipModel`, `standardCargo`, `buildContract`, `skillLevel`) are not exported; tests that need one import it from its module.
 - **Coverage** uses `@vitest/coverage-v8`, configured in the root `vitest.config.ts` to measure only `packages/sim/src` with a 90% line threshold. `pnpm coverage` runs the whole suite with coverage, and CI runs it in place of `pnpm test`, so a coverage drop fails CI.
 - **The Step 1.3 smoke test is removed** now that the sim package has real tests.
+
+## Step 4.1
+
+- **`@deadhead/schema` depends on `@deadhead/sim`** so error codes are built from sim's `DISPATCH_FAILURES` and `REPOSITION_FAILURES`, which replace the earlier type-only unions. A sim reason cannot exist without a matching API error code.
+- **The API carries only per-player data.** Location details, ship models, cargo and config come from `@deadhead/content`; the API sends ids plus per-player flags (`LocationState` is just `{ id, discovered }`).
+- **Times are Unix-ms numbers** in the API too, matching sim, so the client can pass them straight to sim functions.
+- **Player state:** `tutorial` is `{ loanerLocationId, runInFlight }`, or `null` once the tutorial is over (decision 0.5.26). In-flight dispatches, including the tutorial run, are in `activeDispatches`; ships point to theirs through `dispatchId`. Unacknowledged summaries are in `summaries`.
+- **Ship and pilot `locationId` is null while in flight.** The client gets in-flight positions from the dispatch.
+- **One dispatch request, three kinds:** `contract` (contract + ship + pilot), `tutorial` (contract only; the avatar flies the loaner), `reposition` (ship + pilot + destination).
+- **Create-guest returns the new player's id and full state.** The session itself travels as a cookie (decision 0.5.20).
+- **Compile-time tests** check that the schema `Contract` and sim `Contract` are mutually assignable, and that a sim `DispatchRecord` fits the API `Dispatch`.

memory-bank/architecture.md

@@ -0,0 +1,40 @@
+# Architecture
+
+Living reference for how the code is organised. Update it after any database schema or API change (implementation plan rule 0.1.9). Decisions and their reasons live in `DECISIONS.md`.
+
+## Packages
+
+| Package | Role | Depends on |
+|---|---|---|
+| `packages/content` | Static game data (locations, ship models, cargo, skills, `GameConfig`) as Zod-validated TypeScript, plus the `content` bundle with id lookups. | zod |
+| `packages/sim` | Pure, deterministic game rules: clock, seeded RNG, positions, distances, travel, fuel, eligibility, contract boards, dispatch validation/records, flight progress, XP, resolution. No I/O, no `Date.now()`, no `Math.random()`. | content, astronomy-engine |
+| `packages/schema` | Zod schemas for every API request, response and error. Shared by server and client. | sim (error codes), zod |
+| `apps/server` | Fastify API, Postgres via Drizzle, pg-boss workers. The authority on outcomes. | content, sim, schema |
+| `apps/web` | React client. Predicts with sim, never decides outcomes. | content, sim, schema |
+
+## Conventions
+
+- **Times** are Unix milliseconds (numbers). A *real* time is a wall-clock instant; a *game* time is the instant of the in-game date (`realToGame` / `gameToReal` in sim).
+- **Ids** are non-empty strings. Content ids are kebab-case (`earth`, `bulk-hauler`).
+- **Credits** are whole numbers.
+- **Static vs. player data:** the API never sends static data. The client imports `@deadhead/content` and joins by id.
+
+## API data model (`packages/schema`)
+
+| Shape | Fields |
+|---|---|
+| `ServerTime` | `realTime`, `gameTime` |
+| `Company` | `id`, `name`, `credits` |
+| `Ship` | `id`, `modelId`, `name`, `status` (`idle` / `in-flight`), `locationId` (null in flight), `dispatchId` (null when idle), `pilotId` |
+| `Pilot` | `id`, `name`, `isAvatar`, `xp`, `level`, `skills` (`{ skillId: level }`), `skillPointsAvailable`, `assignedShipId`, `status`, `locationId` (null in flight) |
+| `Bay` | `id`, `locationId` |
+| `LocationState` | `id`, `discovered` |
+| `Contract` | mirrors sim `Contract` |
+| `Dispatch` | mirrors sim `DispatchRecord` + `status` (`in-flight` / `resolved`), `resolvedAt` |
+| `ResolutionSummary` | `dispatchId`, `shipId`, `pilotId`, `originId`, `destinationId`, `tutorial`, `credits`, `pilotXp`, `discoveredLocationId`, `resolvedAt` |
+| `TutorialState` | `loanerLocationId` (`earth` / `moon`), `runInFlight` |
+| `PlayerState` | `company`, `ships`, `pilots`, `bays`, `locations`, `tutorial` (null once over), `activeDispatches`, `summaries` |
+
+### Errors
+
+Every non-2xx response has the body `{ error: { code, message } }`. `code` is one of `ERROR_CODES`: every sim dispatch and reposition validation reason (`DISPATCH_FAILURES`, `REPOSITION_FAILURES`), unchanged, plus the server codes in `SERVER_ERROR_CODES` (`validation-error`, `unauthorized`, `not-found`, `insufficient-funds`, ...).

memory-bank/progress.md

@@ -37,3 +37,8 @@
 - [x] **Step 3.16 — XP and leveling.** `src/xp.ts`: `deliveryXp`, `pilotLevel`, `skillPointsAvailable`.
 - [x] **Step 3.17 — Dispatch resolution.** `src/resolution.ts`: `resolveDispatch` returns `in-flight` or a `Resolution` (credits after pilot pay, XP, new ship location, discovery).
 - [x] **Step 3.18 — Public API and coverage.** `src/index.ts` exports an explicit list (content lookups and contract building stay internal). `pnpm coverage` (V8, `packages/sim/src`, 90% line threshold) reports 100% lines; CI now runs `pnpm coverage` instead of `pnpm test`.
+
+## Phase 4 — Shared Schema Package
+
+- [x] **Step 4.1 — API data shapes.** `packages/schema/src`: entity schemas (`entities.ts`), error format and codes (`errors.ts`), request/response bodies (`requests.ts`). Error codes include every sim validation reason; sim now exports `DISPATCH_FAILURES` / `REPOSITION_FAILURES`. `architecture.md` started with the API data model.
+- [ ] Step 4.2 — API route catalog

packages/schema/package.json

@@ -7,5 +7,9 @@
   "types": "./src/index.ts",
   "scripts": {
     "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@deadhead/sim": "workspace:*",
+    "zod": "^4.6.5"
   }
 }

packages/schema/src/entities.ts

@@ -0,0 +1,141 @@
+import { z } from "zod";
+
+/**
+ * Per-player data sent over the API. Static data (location details, ship
+ * models, cargo, skills, config) comes from `@deadhead/content`; these shapes
+ * refer to it by id. Times are Unix milliseconds, as in `@deadhead/sim`.
+ */
+
+export const idSchema = z.string().min(1);
+export const timeSchema = z.number().int().nonnegative();
+const credits = z.number().int();
+
+export const serverTimeSchema = z.object({
+  realTime: timeSchema,
+  /** In-game instant (sim `realToGame` of `realTime`). */
+  gameTime: z.number().int(),
+});
+export type ServerTime = z.infer<typeof serverTimeSchema>;
+
+export const companySchema = z.object({
+  id: idSchema,
+  name: z.string().min(1),
+  /** May go negative only through pilot pay on a low payout (see DECISIONS Step 3.17). */
+  credits,
+});
+export type Company = z.infer<typeof companySchema>;
+
+export const shipSchema = z.object({
+  id: idSchema,
+  modelId: idSchema,
+  name: z.string().min(1),
+  status: z.enum(["idle", "in-flight"]),
+  /** Where an idle ship is; null while in flight. */
+  locationId: idSchema.nullable(),
+  /** The active dispatch while in flight; null when idle. */
+  dispatchId: idSchema.nullable(),
+  pilotId: idSchema.nullable(),
+});
+export type Ship = z.infer<typeof shipSchema>;
+
+export const pilotSchema = z.object({
+  id: idSchema,
+  name: z.string().min(1),
+  isAvatar: z.boolean(),
+  xp: z.number().int().nonnegative(),
+  level: z.number().int().nonnegative(),
+  /** Skill levels by skill id; a missing skill is level 0. */
+  skills: z.record(z.string(), z.number().int().nonnegative()),
+  skillPointsAvailable: z.number().int().nonnegative(),
+  assignedShipId: idSchema.nullable(),
+  status: z.enum(["idle", "in-flight"]),
+  /** Where the pilot is (their ship's location if assigned); null while in flight. */
+  locationId: idSchema.nullable(),
+});
+export type Pilot = z.infer<typeof pilotSchema>;
+
+export const baySchema = z.object({
+  id: idSchema,
+  locationId: idSchema,
+});
+export type Bay = z.infer<typeof baySchema>;
+
+export const locationStateSchema = z.object({
+  id: idSchema,
+  discovered: z.boolean(),
+});
+export type LocationState = z.infer<typeof locationStateSchema>;
+
+/** Mirrors the sim `Contract`. */
+export const contractSchema = z.object({
+  id: idSchema,
+  originId: idSchema,
+  destinationId: idSchema,
+  cargoTypeId: idSchema,
+  tier: z.number().int().min(0),
+  massTonnes: z.number().positive(),
+  payout: credits,
+  requiredSkill: z.object({ skillId: idSchema, level: z.number().int().positive() }).nullable(),
+  requiredLongHaulLevel: z.number().int().nonnegative(),
+  offeredAt: timeSchema,
+  expiresAt: timeSchema,
+  firstContact: z.boolean(),
+});
+export type Contract = z.infer<typeof contractSchema>;
+
+/** Mirrors the sim `DispatchRecord`, plus server-side status. */
+export const dispatchSchema = z.object({
+  id: idSchema,
+  shipId: idSchema,
+  pilotId: idSchema,
+  contract: contractSchema.nullable(),
+  originId: idSchema,
+  destinationId: idSchema,
+  tutorial: z.boolean(),
+  departureAt: timeSchema,
+  arrivalAt: timeSchema,
+  distanceMillionKm: z.number().nonnegative(),
+  fuelCost: credits.nonnegative(),
+  expectedPayout: credits,
+  seed: z.number().int().nonnegative(),
+  status: z.enum(["in-flight", "resolved"]),
+  resolvedAt: timeSchema.nullable(),
+});
+export type Dispatch = z.infer<typeof dispatchSchema>;
+
+/** One "while you were away" entry: a resolved dispatch not yet acknowledged. */
+export const resolutionSummarySchema = z.object({
+  dispatchId: idSchema,
+  shipId: idSchema,
+  pilotId: idSchema,
+  originId: idSchema,
+  destinationId: idSchema,
+  tutorial: z.boolean(),
+  credits,
+  pilotXp: z.number().int().nonnegative(),
+  /** Set when the delivery discovered its destination. */
+  discoveredLocationId: idSchema.nullable(),
+  resolvedAt: timeSchema,
+});
+export type ResolutionSummary = z.infer<typeof resolutionSummarySchema>;
+
+/** Decision 0.5.26: the loaner is not in the ships list. Null once the tutorial ends. */
+export const tutorialStateSchema = z.object({
+  loanerLocationId: z.enum(["earth", "moon"]),
+  runInFlight: z.boolean(),
+});
+export type TutorialState = z.infer<typeof tutorialStateSchema>;
+
+export const playerStateSchema = z.object({
+  company: companySchema,
+  ships: z.array(shipSchema),
+  pilots: z.array(pilotSchema),
+  bays: z.array(baySchema),
+  locations: z.array(locationStateSchema),
+  tutorial: tutorialStateSchema.nullable(),
+  /** In-flight dispatches, including the tutorial run. */
+  activeDispatches: z.array(dispatchSchema),
+  /** Unacknowledged "while you were away" entries. */
+  summaries: z.array(resolutionSummarySchema),
+});
+export type PlayerState = z.infer<typeof playerStateSchema>;

packages/schema/src/errors.ts

@@ -0,0 +1,48 @@
+import {
+  DISPATCH_FAILURES,
+  REPOSITION_FAILURES,
+  type DispatchFailure,
+  type RepositionFailure,
+} from "@deadhead/sim";
+import { z } from "zod";
+
+/** Error codes the server adds on top of the sim's validation reasons. */
+export const SERVER_ERROR_CODES = [
+  "validation-error",
+  "unauthorized",
+  "not-found",
+  "internal-error",
+  "insufficient-funds",
+  "not-in-tutorial",
+  "tutorial-run-in-flight",
+  "unknown-contract",
+  "contract-already-accepted",
+  "location-undiscovered",
+  "bay-already-leased",
+  "no-bay-at-location",
+  "ship-not-idle-here",
+  "ship-crewed",
+  "pilot-already-assigned",
+  "pilot-not-assigned-to-ship",
+  "no-skill-points",
+  "skill-maxed",
+  "unknown-skill",
+] as const;
+
+export type ErrorCode = DispatchFailure | RepositionFailure | (typeof SERVER_ERROR_CODES)[number];
+
+/** Every machine-readable error code. Sim validation reasons are used unchanged. */
+export const ERROR_CODES = [
+  ...new Set<ErrorCode>([...DISPATCH_FAILURES, ...REPOSITION_FAILURES, ...SERVER_ERROR_CODES]),
+] as [ErrorCode, ...ErrorCode[]];
+
+export const errorCodeSchema = z.enum(ERROR_CODES);
+
+/** Body of every non-2xx response. */
+export const errorResponseSchema = z.object({
+  error: z.object({
+    code: errorCodeSchema,
+    message: z.string().min(1),
+  }),
+});
+export type ErrorResponse = z.infer<typeof errorResponseSchema>;

packages/schema/src/index.ts

@@ -1 +1,3 @@
-export {};
+export * from "./entities";
+export * from "./errors";
+export * from "./requests";

packages/schema/src/requests.ts

@@ -0,0 +1,65 @@
+import { z } from "zod";
+import {
+  baySchema,
+  contractSchema,
+  dispatchSchema,
+  idSchema,
+  pilotSchema,
+  playerStateSchema,
+  shipSchema,
+  timeSchema,
+} from "./entities";
+
+/** Request with no body or parameters. */
+export const emptyRequestSchema = z.object({}).strict();
+
+export const createGuestResponseSchema = z.object({
+  playerId: idSchema,
+  state: playerStateSchema,
+});
+
+export const contractBoardRequestSchema = z.object({ locationId: idSchema });
+export const contractBoardResponseSchema = z.object({
+  contracts: z.array(contractSchema),
+  /** When this board period ends and every contract on it expires. */
+  periodEndsAt: timeSchema,
+});
+
+export const createDispatchRequestSchema = z.discriminatedUnion("kind", [
+  z.object({
+    kind: z.literal("contract"),
+    contractId: idSchema,
+    shipId: idSchema,
+    pilotId: idSchema,
+  }),
+  /** The avatar flies the loaner; no ship or pilot to choose. */
+  z.object({ kind: z.literal("tutorial"), contractId: idSchema }),
+  z.object({
+    kind: z.literal("reposition"),
+    shipId: idSchema,
+    pilotId: idSchema,
+    destinationId: idSchema,
+  }),
+]);
+export type CreateDispatchRequest = z.infer<typeof createDispatchRequestSchema>;
+export const dispatchResponseSchema = z.object({ dispatch: dispatchSchema });
+
+export const buyShipRequestSchema = z.object({ modelId: idSchema });
+export const shipResponseSchema = z.object({ ship: shipSchema });
+
+export const leaseBayRequestSchema = z.object({ locationId: idSchema });
+export const bayResponseSchema = z.object({ bay: baySchema });
+
+/** Decision 0.5.22: hire at one of the player's bays. */
+export const hirePilotRequestSchema = z.object({ locationId: idSchema });
+export const assignPilotRequestSchema = z.object({ pilotId: idSchema, shipId: idSchema });
+export const unassignPilotRequestSchema = z.object({ pilotId: idSchema });
+export const spendSkillPointRequestSchema = z.object({ pilotId: idSchema, skillId: idSchema });
+export const pilotResponseSchema = z.object({ pilot: pilotSchema });
+
+export const acknowledgeSummariesRequestSchema = z.object({
+  dispatchIds: z.array(idSchema).min(1),
+});
+export const acknowledgeSummariesResponseSchema = z.object({
+  acknowledged: z.number().int().nonnegative(),
+});

packages/schema/test/schemas.test.ts

@@ -0,0 +1,239 @@
+import {
+  DISPATCH_FAILURES,
+  REPOSITION_FAILURES,
+  type Contract as SimContract,
+  type DispatchRecord,
+} from "@deadhead/sim";
+import { describe, expect, expectTypeOf, it } from "vitest";
+import type { z } from "zod";
+import {
+  acknowledgeSummariesRequestSchema,
+  acknowledgeSummariesResponseSchema,
+  assignPilotRequestSchema,
+  baySchema,
+  bayResponseSchema,
+  buyShipRequestSchema,
+  companySchema,
+  contractBoardRequestSchema,
+  contractBoardResponseSchema,
+  contractSchema,
+  createDispatchRequestSchema,
+  createGuestResponseSchema,
+  dispatchResponseSchema,
+  dispatchSchema,
+  emptyRequestSchema,
+  ERROR_CODES,
+  errorResponseSchema,
+  hirePilotRequestSchema,
+  leaseBayRequestSchema,
+  locationStateSchema,
+  pilotResponseSchema,
+  pilotSchema,
+  playerStateSchema,
+  resolutionSummarySchema,
+  serverTimeSchema,
+  shipResponseSchema,
+  shipSchema,
+  spendSkillPointRequestSchema,
+  tutorialStateSchema,
+  unassignPilotRequestSchema,
+  type Contract,
+  type Dispatch,
+} from "../src/index";
+
+const company = { id: "co1", name: "Deadhead Freight", credits: 5000 };
+const ship = {
+  id: "s1",
+  modelId: "courier",
+  name: "Dusty Mule",
+  status: "idle",
+  locationId: "earth",
+  dispatchId: null,
+  pilotId: "p1",
+};
+const pilot = {
+  id: "p1",
+  name: "Avery Kade",
+  isAvatar: true,
+  xp: 120,
+  level: 1,
+  skills: { "long-haul": 1 },
+  skillPointsAvailable: 1,
+  assignedShipId: "s1",
+  status: "idle",
+  locationId: "earth",
+};
+const bay = { id: "b1", locationId: "earth" };
+const location = { id: "mars", discovered: false };
+const contract = {
+  id: "earth:1:0",
+  originId: "earth",
+  destinationId: "moon",
+  cargoTypeId: "standard",
+  tier: 0,
+  massTonnes: 12,
+  payout: 480,
+  requiredSkill: null,
+  requiredLongHaulLevel: 0,
+  offeredAt: 3_600_000,
+  expiresAt: 7_200_000,
+  firstContact: false,
+};
+const dispatch = {
+  id: "d1",
+  shipId: "s1",
+  pilotId: "p1",
+  contract,
+  originId: "earth",
+  destinationId: "moon",
+  tutorial: false,
+  departureAt: 4_000_000,
+  arrivalAt: 4_130_000,
+  distanceMillionKm: 0.39,
+  fuelCost: 234,
+  expectedPayout: 480,
+  seed: 123456,
+  status: "in-flight",
+  resolvedAt: null,
+};
+const summary = {
+  dispatchId: "d0",
+  shipId: "s1",
+  pilotId: "p1",
+  originId: "moon",
+  destinationId: "earth",
+  tutorial: true,
+  credits: 240,
+  pilotXp: 10,
+  discoveredLocationId: null,
+  resolvedAt: 3_900_000,
+};
+const tutorial = { loanerLocationId: "earth", runInFlight: false };
+const playerState = {
+  company,
+  ships: [ship],
+  pilots: [pilot],
+  bays: [bay],
+  locations: [location],
+  tutorial,
+  activeDispatches: [dispatch],
+  summaries: [summary],
+};
+
+const cases: [string, z.ZodType, unknown, unknown][] = [
+  [
+    "server time",
+    serverTimeSchema,
+    { realTime: 1, gameTime: 60 },
+    { realTime: "now", gameTime: 60 },
+  ],
+  ["company", companySchema, company, { ...company, credits: 1.5 }],
+  ["ship", shipSchema, ship, { ...ship, status: "lost" }],
+  ["pilot", pilotSchema, pilot, { ...pilot, xp: -1 }],
+  ["bay", baySchema, bay, { id: "b1" }],
+  ["location", locationStateSchema, location, { id: "mars", discovered: "no" }],
+  ["contract", contractSchema, contract, { ...contract, tier: -1 }],
+  ["dispatch", dispatchSchema, dispatch, { ...dispatch, status: "lost" }],
+  ["resolution summary", resolutionSummarySchema, summary, { ...summary, pilotXp: -5 }],
+  ["tutorial", tutorialStateSchema, tutorial, { ...tutorial, loanerLocationId: "mars" }],
+  ["player state", playerStateSchema, playerState, { ...playerState, ships: null }],
+  [
+    "error",
+    errorResponseSchema,
+    { error: { code: "out-of-range", message: "Destination is out of range." } },
+    { error: { code: "made-up", message: "?" } },
+  ],
+  ["empty request", emptyRequestSchema, {}, { extra: 1 }],
+  [
+    "create guest response",
+    createGuestResponseSchema,
+    { playerId: "pl1", state: playerState },
+    { playerId: "pl1" },
+  ],
+  ["contract board request", contractBoardRequestSchema, { locationId: "earth" }, {}],
+  [
+    "contract board response",
+    contractBoardResponseSchema,
+    { contracts: [contract], periodEndsAt: 7_200_000 },
+    { contracts: [contract] },
+  ],
+  [
+    "create dispatch request",
+    createDispatchRequestSchema,
+    { kind: "contract", contractId: "c1", shipId: "s1", pilotId: "p1" },
+    { kind: "contract", contractId: "c1" },
+  ],
+  ["dispatch response", dispatchResponseSchema, { dispatch }, { dispatch: {} }],
+  ["buy ship request", buyShipRequestSchema, { modelId: "courier" }, { modelId: "" }],
+  ["ship response", shipResponseSchema, { ship }, {}],
+  ["lease bay request", leaseBayRequestSchema, { locationId: "moon" }, { locationId: 3 }],
+  ["bay response", bayResponseSchema, { bay }, { bay: null }],
+  ["hire pilot request", hirePilotRequestSchema, { locationId: "earth" }, {}],
+  [
+    "assign pilot request",
+    assignPilotRequestSchema,
+    { pilotId: "p1", shipId: "s1" },
+    { pilotId: "p1" },
+  ],
+  ["unassign pilot request", unassignPilotRequestSchema, { pilotId: "p1" }, {}],
+  [
+    "spend skill point request",
+    spendSkillPointRequestSchema,
+    { pilotId: "p1", skillId: "heavy-cargo" },
+    { pilotId: "p1" },
+  ],
+  ["pilot response", pilotResponseSchema, { pilot }, { pilot: {} }],
+  [
+    "acknowledge summaries request",
+    acknowledgeSummariesRequestSchema,
+    { dispatchIds: ["d0"] },
+    { dispatchIds: [] },
+  ],
+  ["acknowledge summaries response", acknowledgeSummariesResponseSchema, { acknowledged: 1 }, {}],
+];
+
+describe.each(cases)("%s schema", (_name, schema, valid, invalid) => {
+  it("accepts a valid example", () => {
+    expect(schema.safeParse(valid).success).toBe(true);
+  });
+
+  it("rejects an invalid example", () => {
+    expect(schema.safeParse(invalid).success).toBe(false);
+  });
+});
+
+describe("create dispatch request", () => {
+  it("accepts tutorial and reposition variants", () => {
+    expect(
+      createDispatchRequestSchema.safeParse({ kind: "tutorial", contractId: "c1" }).success,
+    ).toBe(true);
+    expect(
+      createDispatchRequestSchema.safeParse({
+        kind: "reposition",
+        shipId: "s1",
+        pilotId: "p1",
+        destinationId: "moon",
+      }).success,
+    ).toBe(true);
+  });
+});
+
+describe("error codes", () => {
+  it("include every sim dispatch and reposition validation reason", () => {
+    for (const reason of [...DISPATCH_FAILURES, ...REPOSITION_FAILURES]) {
+      expect(ERROR_CODES).toContain(reason);
+    }
+  });
+
+  it("are unique", () => {
+    expect(new Set(ERROR_CODES).size).toBe(ERROR_CODES.length);
+  });
+});
+
+describe("sim compatibility", () => {
+  it("keeps contracts and dispatches assignable to and from the sim types", () => {
+    expectTypeOf<SimContract>().toExtend<Contract>();
+    expectTypeOf<Contract>().toExtend<SimContract>();
+    expectTypeOf<DispatchRecord>().toExtend<Omit<Dispatch, "status" | "resolvedAt">>();
+  });
+});

packages/sim/src/dispatch.ts

@@ -36,18 +36,21 @@ export interface DispatchProposal {
   now: RealTime;
 }
 
-export type DispatchFailure =
+/** Every reason `validateDispatch` can fail, in check order. */
-  | "ship-not-idle"
+export const DISPATCH_FAILURES = [
-  | "ship-not-at-origin"
+  "ship-not-idle",
-  | "pilot-not-idle"
+  "ship-not-at-origin",
-  | "pilot-not-assigned"
+  "pilot-not-idle",
-  | "over-capacity"
+  "pilot-not-assigned",
-  | "cannot-land"
+  "over-capacity",
-  | "out-of-range"
+  "cannot-land",
-  | "cargo-skill-too-low"
+  "out-of-range",
-  | "long-haul-too-low"
+  "cargo-skill-too-low",
-  | "contract-expired"
+  "long-haul-too-low",
-  | "insufficient-credits";
+  "contract-expired",
+  "insufficient-credits",
+] as const;
+export type DispatchFailure = (typeof DISPATCH_FAILURES)[number];
 
 export type DispatchCheck = { ok: true } | { ok: false; reason: DispatchFailure };
 
@@ -196,15 +199,18 @@ export interface RepositionProposal {
   now: RealTime;
 }
 
-export type RepositionFailure =
+/** Every reason `validateReposition` can fail, in check order. */
-  | "ship-not-idle"
+export const REPOSITION_FAILURES = [
-  | "pilot-not-idle"
+  "ship-not-idle",
-  | "pilot-not-assigned"
+  "pilot-not-idle",
-  | "already-there"
+  "pilot-not-assigned",
-  | "no-bay-at-destination"
+  "already-there",
-  | "cannot-land"
+  "no-bay-at-destination",
-  | "out-of-range"
+  "cannot-land",
-  | "insufficient-credits";
+  "out-of-range",
+  "insufficient-credits",
+] as const;
+export type RepositionFailure = (typeof REPOSITION_FAILURES)[number];
 
 export type RepositionCheck = { ok: true } | { ok: false; reason: RepositionFailure };
 

packages/sim/src/index.ts

@@ -35,6 +35,8 @@ export { LONG_HAUL_SKILL_ID, checkPilotEligibility } from "./pilot";
 export type { PilotCheck, SkillLevels } from "./pilot";
 
 export {
+  DISPATCH_FAILURES,
+  REPOSITION_FAILURES,
   createDispatchRecord,
   createRepositionRecord,
   tripFuelCost,

pnpm-lock.yaml

@@ -49,7 +49,14 @@ importers:
         specifier: ^4.6.5
         version: 4.6.5
 
-  packages/schema: {}
+  packages/schema:
+    dependencies:
+      '@deadhead/sim':
+        specifier: workspace:*
+        version: link:../sim
+      zod:
+        specifier: ^4.6.5
+        version: 4.6.5
 
   packages/sim:
     dependencies: