Reputation economy: rep-scaled buy/refuel discounts + job reward quality (ISS-072, v0.38.0)

Special jobs: data-driven registry + priority status (ISS-073, v0.37.0)

CHANGELOG.md

@@ -1,5 +1,15 @@
 # Changelog
 
+## v0.38.0 — 2026-09-21 10:47
+- **Reputation economy (ISS-072).** Reputation is no longer a dead stat — it drives the economy through three simple tunable formulas, all built on one new pure helper `repRate(reputation, perPoint, cap)` in `lib/game/catalog.ts` (linear above the starting value of 10, capped; exactly 0 at/below start so default-rep behavior is byte-identical):
+  - **Cheaper plane purchases** — `buyPlane` (`lib/game/actions.ts`) charges `price × (1 − repRate(rep, PLANE_DISCOUNT_PER_REP = 0.01, MAX_PLANE_DISCOUNT = 0.4))`, rounded to 2dp; the effective cost drives both the funds check and the deduction (up to 40% off at rep ≥ 50)
+  - **Cheaper refuel** — `refuelPlane` multiplies ONLY the price term: `liters × FUEL_PRICE_PER_L × (1 − repRate(rep, FUEL_DISCOUNT_PER_REP = 0.005, MAX_FUEL_DISCOUNT = 0.2))`; burn/target math (wind factor, ×1.5 forFlight margin) untouched
+  - **Better jobs at higher reputation** — `generatePackage` (`lib/game/seed.ts`) takes an optional `reputation` input (defaults to the starting value) and multiplies the final reward by `1 + repRate(rep, JOB_BONUS_PER_REP = 0.01, MAX_JOB_BONUS = 1.0)` at the same spot as the special multiplier (base × jobBonus × special, single round at the end; up to ×2 at rep ≥ 110). Consumes NO extra RNG draw
+- **Spawn sites carry live reputation.** `spawnOpenPackages` + `spawnCoveragePackages` (`lib/sim/engine.ts`) read the account row once per spawn batch and thread its reputation into `generatePackage`; the test hook POST /api/test/create-package does the same (hook-created packages get current job quality, never a forced value). `buildSeed` keeps defaulting — no rep at seed time
+- **UI shows the effect.** The market buy row (`components/RightPane.tsx`) previews the EFFECTIVE price computed client-side from the snapshot's reputation + the imported constants, with a sky-blue "−N%" pill (`market-buy-discount`, reusing `.special-badge`) when the discount is non-zero; tech-spec cards keep showing full list prices. The left-pane Refuel section (`components/LeftPane.tsx`) previews the discounted fill-up cost with its own `refuel-discount` pill. No new snapshot fields — rep was already in the state, so the OpenAPI schema is unchanged
+- **OpenAPI (descriptions only).** buy-plane + refuel endpoint descriptions mention the rep-scaled discounts; `CatalogEntry.price`, `StateSnapshot.fuelPricePerL` and `AccountState.reputation` gain notes that the discount applies at purchase/refuel time. No properties or endpoints added/removed
+- **Tests.** New unit tests: `repRate` (zero at/below start, linear mid-range exact values, cap clamping), `buyPlane` at rep 30 (exact discounted cash delta + funds boundary between discounted and full price), `refuelPlane` at fixed rep in both 'full' and 'forFlight' modes (discount on the price term only), `generatePackage` job bonus (×1.5 at rep 60, default-rep byte-identity, composition with the special multiplier, no extra RNG draw). All existing unit tests pass unmodified — at the starting reputation every rate is exactly 0. E2E: the full-price pins in `right-pane.spec.ts`, `two-planes.spec.ts` and `actions.spec.ts` now compute expectations from the LIVE snapshot's reputation via the imported helpers (rep accumulates across specs), plus a new assertion that the buy-row discount pill appears iff live rep > starting with text round(rate × 100)
+
 ## v0.37.0 — 2026-09-21 09:29
 - **Special jobs: data-driven special-status registry for packages (ISS-073).** New `lib/game/specials.ts` holds a flat `SPECIALS` record (`special status → { rewardMultiplier, deadlineScale, repBonus }`) in the same house style as `PLANE_TYPES`, plus `SPECIAL_SPAWN_CHANCE = 0.15` and a pure `pickSpecial(rng, registry?)` helper (one chance draw, then a uniform pick among the registry's keys; the registry is a param defaulting to the real one). Adding or removing a special is an edit of ONE registry entry — no scattered branches. First status: **priority** (×1.5 reward, ×0.5 deadline window, +0.5 rep at delivery; all balance-tunable)
 - **Spawn & modifiers.** `generatePackage` (`lib/game/seed.ts`) appends one RNG draw at the END of its fixed order to roll a special (~15% of packages); a forced `special` input (including explicit null) skips the draw, mirroring the other overrides. The reward multiplier applies where the reward is computed; the deadline scale applies only to the drawn 6–72h window — a forced `deadlineOffsetMs` skips scaling

app/api/test/create-package/route.ts

@@ -82,6 +82,10 @@ export async function POST(req: Request) {
     }
 
     const rng = mulberry32(randomInt(0, 2 ** 31));
+    // v0.38.0 (ISS-072): hook-created packages carry the LIVE account reputation — same job quality
+    // as engine spawns; never force a fixed value here.
+    const account = (await inst.db.select().from(schema.account))[0];
+    if (!account) throw new Error('account row missing');
     const created = generatePackage({
       id: randomUUID(),
       airports,
@@ -93,6 +97,7 @@ export async function POST(req: Request) {
       weightKg: input.weightKg as number | undefined,
       // Omitted → force null (no roll) so existing e2e reward/rep assertions stay deterministic.
       special: input.special === undefined ? null : (input.special as string | null),
+      reputation: account.reputation,
     });
     await inst.db.insert(schema.packages).values(created);
     await persist(inst);

components/LeftPane.tsx

@@ -3,7 +3,7 @@
 import { useCallback, useEffect, useRef, useState, type ChangeEvent } from 'react';
 import type { GeoJsonFeatureCollection } from '@/lib/airports';
 import type { PlaneState, StateSnapshot } from '@/lib/game/state';
-import { PLANE_TYPES } from '@/lib/game/catalog';
+import { FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT, PLANE_TYPES, repRate } from '@/lib/game/catalog';
 import { abandonPenalty } from '@/lib/game/penalty';
 import { formatCash, formatDeadlineRelative, formatFuel, formatSimClock, formatSpecialLabel } from '@/lib/format';
 import { TIME_SCALES, scaleToSlider, sliderToScale } from '@/lib/timeScale';
@@ -217,7 +217,12 @@ export default function LeftPane({ state, loading, error, onRefresh, applySnapsh
     (state?.planes.find((p) => p.id === refuelPlaneId && p.status === 'available' && p.fuel < p.maxFuel)) ??
     refuelable[0] ??
     null;
-  const refuelCost = refuelPlane && state ? (refuelPlane.maxFuel - refuelPlane.fuel) * state.fuelPricePerL : null;
+  // v0.38.0 (ISS-072): rep-scaled preview — same formula as the server's refuelPlane 'full' mode.
+  const fuelDiscountRate = state ? repRate(state.account.reputation, FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT) : 0;
+  const refuelCost =
+    refuelPlane && state
+      ? Math.round((refuelPlane.maxFuel - refuelPlane.fuel) * state.fuelPricePerL * (1 - fuelDiscountRate) * 100) / 100
+      : null;
 
   // Slider commit (v0.9.1): the displayed value follows the drag optimistically via
   // pendingScale; POST /api/sim fires after a 250 ms debounce, or immediately when the
@@ -566,6 +571,10 @@ export default function LeftPane({ state, loading, error, onRefresh, applySnapsh
                   <span data-testid="market-refuel-cost" className="market-preview">
                     {refuelCost !== null ? formatCash(refuelCost) : ''}
                   </span>
+                  {/* v0.38.0 (ISS-072): rep discount hint — only when the account actually gets one. */}
+                  {fuelDiscountRate > 0 && (
+                    <span data-testid="refuel-discount" className="special-badge">−{Math.round(fuelDiscountRate * 100)}%</span>
+                  )}
                 </>
               )}
               <button

components/RightPane.tsx

@@ -2,7 +2,7 @@
 
 import { useState } from 'react';
 import type { PackageState, PlaneState, StateSnapshot } from '@/lib/game/state';
-import { PLANE_TYPES, SELL_FRACTION } from '@/lib/game/catalog';
+import { MAX_PLANE_DISCOUNT, PLANE_DISCOUNT_PER_REP, PLANE_TYPES, repRate, SELL_FRACTION } from '@/lib/game/catalog';
 import { maxRangeKm } from '@/lib/sim/movement';
 import { formatCargo, formatCash, formatDeadlineRelative, formatSpecialLabel } from '@/lib/format';
 import { useGameAction } from '@/lib/useGameAction';
@@ -151,6 +151,9 @@ export default function RightPane({ state, loading, applySnapshot, onHover, onEr
   // Previews computed client-side from the snapshot's catalog + economy constants (v0.10.0).
   const sellEntry = sellPlane ? catalog.find((e) => e.model === sellPlane.model) : undefined;
   const sellPayout = sellEntry ? Math.round(sellEntry.price * state.sellFraction * 100) / 100 : null;
+  // v0.38.0 (ISS-072): the buy row shows the EFFECTIVE price — same rep-scaled formula as the server's buyPlane.
+  const planeDiscountRate = repRate(state.account.reputation, PLANE_DISCOUNT_PER_REP, MAX_PLANE_DISCOUNT);
+  const buyPrice = buyEntry ? Math.round(buyEntry.price * (1 - planeDiscountRate) * 100) / 100 : null;
 
   return (
     <aside data-testid="right-pane" className="pane right-pane">
@@ -265,8 +268,12 @@ export default function RightPane({ state, loading, applySnapshot, onHover, onEr
             ))}
           </select>
           <span data-testid="market-buy-price" className="market-preview">
-            {buyEntry ? formatCash(buyEntry.price) : ''}
+            {buyPrice !== null ? formatCash(buyPrice) : ''}
           </span>
+          {/* v0.38.0 (ISS-072): rep discount hint — only when the account actually gets one. */}
+          {planeDiscountRate > 0 && (
+            <span data-testid="market-buy-discount" className="special-badge">−{Math.round(planeDiscountRate * 100)}%</span>
+          )}
           <button
             type="button"
             data-testid="market-buy"

e2e/actions.spec.ts

@@ -5,6 +5,8 @@ import { expect, test } from '@playwright/test';
 import { initialBearingDeg } from '../lib/geo';
 import { weatherFor } from '../lib/weather';
 import { windBurnFactor } from '../lib/sim/movement';
+// v0.38.0 (ISS-072) — reputation discounts: expectations computed from the LIVE snapshot's rep with the real helpers.
+import { FUEL_DISCOUNT_PER_REP, FUEL_PRICE_PER_L, MAX_FUEL_DISCOUNT, repRate } from '../lib/game/catalog';
 
 // v0.12.0 package model against the live origin (https://flight.dev.kkhost.pl):
 // the full core loop through the UI — hook creates a short package at EDDF → Load
@@ -21,7 +23,7 @@ const FAR = 'LEZL'; // Seville — a long leg: under the v0.16.0 weighted model
 
 // Mirrors lib/sim/movement.ts (v0.16.0 weight-proportional burn) + lib/game/catalog.ts (atr72).
 const FUEL_DENSITY_KG_PER_L = 0.8; // Jet-A1 density — must match FUEL_DENSITY_KG_PER_L in movement.ts
-const FUEL_PRICE_PER_L = 0.8; // must match catalog.ts
+// FUEL_PRICE_PER_L is imported from ../lib/game/catalog (v0.38.0) instead of mirrored here.
 const REP_BASE = 1; // lib/sim/engine.ts
 const REP_PER_KM = 0.0005;
 
@@ -239,13 +241,14 @@ test('full core loop via UI: load → fly to destination → exact reward + rep
     6,
   );
 
-  // Refuel via the API: cost = (maxFuel − fuel) × FUEL_PRICE_PER_L, deducted exactly.
+  // Refuel via the API: cost = (maxFuel − fuel) × FUEL_PRICE_PER_L, rep-scaled (v0.38.0, ISS-072), deducted exactly.
   const refuelRes = await page.request.post(`/api/planes/${planeId}/refuel`);
   expect(refuelRes.ok()).toBeTruthy();
   s = await getState(page);
   const afterRefuel = s.planes.find((p) => p.id === planeId)!;
   expect(afterRefuel.fuel).toBe(afterRefuel.maxFuel); // back to full
-  const refuelCost = Math.round((afterRefuel.maxFuel - landed.fuel) * FUEL_PRICE_PER_L * 100) / 100;
+  const fuelRate = repRate(s.account.reputation, FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT);
+  const refuelCost = Math.round((afterRefuel.maxFuel - landed.fuel) * FUEL_PRICE_PER_L * (1 - fuelRate) * 100) / 100;
   expect(s.account.cash).toBeCloseTo(before.account.cash + pkg.reward - refuelCost, 6);
 
   // Restore: fly home (repositioning — no package needed in the v0.12.0 model). ISS-041: the

e2e/right-pane.spec.ts

@@ -5,6 +5,9 @@ import { expect, test } from '@playwright/test';
 import { initialBearingDeg } from '../lib/geo';
 import { weatherFor } from '../lib/weather';
 import { windBurnFactor } from '../lib/sim/movement';
+// v0.38.0 (ISS-072) — reputation discounts: expectations computed from the LIVE snapshot's rep with the real helpers.
+import { FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT, MAX_PLANE_DISCOUNT, PLANE_DISCOUNT_PER_REP, repRate } from '../lib/game/catalog';
+import { STARTING_REPUTATION } from '../lib/game/seed';
 
 // v0.12.0 — right Jobs & Market pane against the live origin: open packages render with
 // names/reward/deadline and Load (UI click) binds one to the starter; the on-board list
@@ -367,11 +370,20 @@ test('market buy/sell render with previews from the catalog in /api/state; left-
   // v0.28.0 (ISS-047): the market rows live in the Planes market tab — switch to it first.
   await page.getByTestId('tab-planes-market').click();
 
-  // Buy: the model picker lists the catalog entry and the price preview is its full price.
+  // Buy: the model picker lists the catalog entry and the price preview is its EFFECTIVE price —
+  // rep-scaled (v0.38.0) from the live snapshot's reputation; at the starting rep this equals list price.
   const buyModel = page.getByTestId('market-buy-model');
   await expect(buyModel).toBeVisible({ timeout: 15_000 });
   await expect(buyModel.locator(`option[value="${entry.model}"]`)).toHaveText(entry.label);
-  await expect(page.getByTestId('market-buy-price')).toContainText(eur(entry.price));
+  const planeRate = repRate(body.account.reputation, PLANE_DISCOUNT_PER_REP, MAX_PLANE_DISCOUNT);
+  const buyPrice = Math.round(entry.price * (1 - planeRate) * 100) / 100;
+  await expect(page.getByTestId('market-buy-price')).toContainText(eur(buyPrice));
+  // The discount pill is present iff the live rep earns one, and shows round(rate × 100).
+  if (body.account.reputation > STARTING_REPUTATION) {
+    await expect(page.getByTestId('market-buy-discount')).toHaveText(`−${Math.round(planeRate * 100)}%`);
+  } else {
+    await expect(page.getByTestId('market-buy-discount')).toHaveCount(0);
+  }
   await expect(page.getByTestId('market-buy')).toBeVisible();
 
   // Sell: the grounded-plane picker lists plane-starter and the payout preview is
@@ -387,7 +399,9 @@ test('market buy/sell render with previews from the catalog in /api/state; left-
 
   // Refuel through the pane: the flight genuinely burned fuel…
   if (starter.fuel < starter.maxFuel) {
-    const expectedCost = Math.round((starter.maxFuel - starter.fuel) * body.fuelPricePerL * 100) / 100;
+    // v0.38.0 (ISS-072): rep-scaled cost — same formula as the server's refuelPlane 'full'.
+    const fuelRate = repRate(body.account.reputation, FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT);
+    const expectedCost = Math.round((starter.maxFuel - starter.fuel) * body.fuelPricePerL * (1 - fuelRate) * 100) / 100;
     const cashBefore = body.account.cash;
 
     // …the refuel picker lists it, the preview matches the exact cost, and the click deducts it.
@@ -455,7 +469,9 @@ test('on-board row Refuel buys 150% of the weather-adjusted leg requirement; lef
   const target = Math.min(entry.maxFuel, required * 1.5); // ISS-071: 150% margin, capped at tank capacity
   const liters = Math.max(0, target - fuelBefore);
   expect(liters).toBeGreaterThan(0); // the long leg genuinely needs more than what's left
-  const expectedCost = Math.round(liters * pre.fuelPricePerL * 100) / 100;
+  // v0.38.0 (ISS-072): rep-scaled cost — same formula as the server's refuelPlane 'forFlight'.
+  const fuelRate = repRate(pre.account.reputation, FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT);
+  const expectedCost = Math.round(liters * pre.fuelPricePerL * (1 - fuelRate) * 100) / 100;
 
   await page.goto('/');
   const refuelBtn = page.getByTestId(`refuel-for-${pkg2.id}`);

e2e/two-planes.spec.ts

@@ -5,6 +5,8 @@ import { expect, test } from '@playwright/test';
 import { initialBearingDeg } from '../lib/geo';
 import { weatherFor } from '../lib/weather';
 import { windBurnFactor } from '../lib/sim/movement';
+// v0.38.0 (ISS-072) — reputation discounts: expectations computed from the LIVE snapshot's rep with the real helpers.
+import { FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT, repRate } from '../lib/game/catalog';
 
 // v0.31.0 — ISS-055: gameplay with TWO planes in the fleet. The reported bug ("can't load cargo
 // if both planes are on the same airport") was UX-only: LoadControls' multi-plane path rendered a
@@ -452,8 +454,10 @@ test('refuel section lists both planes; refueling one tops only its tank', async
   await expect(refuelSelect.locator(`option[value="${STARTER}"]`)).toHaveCount(1);
   await expect(refuelSelect.locator(`option[value="${secondId}"]`)).toHaveCount(1);
 
-  // …select the SECOND plane — the preview is its exact fill-up cost (mirrors refuelPlane 'full').
+  // …select the SECOND plane — the preview is its exact fill-up cost (mirrors refuelPlane 'full'),
-  const expectedCost = Math.round((second.maxFuel - second.fuel) * pre.fuelPricePerL * 100) / 100;
+  // rep-scaled (v0.38.0, ISS-072) from the live snapshot's reputation.
+  const fuelRate = repRate(pre.account.reputation, FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT);
+  const expectedCost = Math.round((second.maxFuel - second.fuel) * pre.fuelPricePerL * (1 - fuelRate) * 100) / 100;
   await refuelSelect.selectOption(secondId);
   await expect(page.getByTestId('market-refuel-cost')).toContainText(eur(expectedCost));
 

lib/game/actions.test.ts

@@ -9,7 +9,16 @@ import { loadAirportsGeoJson } from '@/lib/airports';
 import { haversineKm, initialBearingDeg } from '@/lib/geo';
 import { weatherFor } from '@/lib/weather';
 import { requiredFuelFor, windBurnFactor } from '@/lib/sim/movement';
-import { FUEL_PRICE_PER_L, PLANE_TYPES, SELL_FRACTION } from './catalog';
+import {
+  FUEL_DISCOUNT_PER_REP,
+  FUEL_PRICE_PER_L,
+  MAX_FUEL_DISCOUNT,
+  MAX_PLANE_DISCOUNT,
+  PLANE_DISCOUNT_PER_REP,
+  PLANE_TYPES,
+  repRate,
+  SELL_FRACTION,
+} from './catalog';
 import { HUB_ICAO } from './seed';
 import {
   abandonPackage,
@@ -487,6 +496,38 @@ describe('buyPlane', () => {
     const inst = await freshDb('buy-poor.db'); // seeded cash is 20k < 200k
     await expectActionError(buyPlane(inst, 'atr72'), 409, /insufficient funds/i);
   });
+
+  it('deducts the reputation-scaled cost at elevated rep (v0.38.0)', async () => {
+    const inst = await freshDb('buy-rep.db');
+    // rep 30 → rate exactly 0.2 → ATR costs 160k, not 200k.
+    await inst.db.update(schema.account).set({ cash: 500_000, reputation: 30 });
+
+    const before = (await inst.db.select().from(schema.planes)).length;
+    await buyPlane(inst, 'atr72');
+
+    const rate = repRate(30, PLANE_DISCOUNT_PER_REP, MAX_PLANE_DISCOUNT);
+    expect(rate).toBeCloseTo(0.2, 12); // sanity pin on the formula input
+    const expectedCost = Math.round(PLANE_TYPES.atr72.price * (1 - rate) * 100) / 100;
+    expect(expectedCost).toBe(160_000); // 200k × 0.8 — exact value pin
+    const account = (await inst.db.select().from(schema.account))[0];
+    expect(account.cash).toBeCloseTo(500_000 - expectedCost, 6);
+    expect((await inst.db.select().from(schema.planes)).length).toBe(before + 1);
+  });
+
+  it('buys with cash between the discounted and full price; rejects below the discounted cost (v0.38.0)', async () => {
+    const inst = await freshDb('buy-boundary.db');
+    // rep 30 → discounted cost 160k: 170k is enough now, though it was not before v0.38.0.
+    await inst.db.update(schema.account).set({ cash: 170_000, reputation: 30 });
+
+    const { planeId } = await buyPlane(inst, 'atr72');
+    expect(planeId).toBeTruthy(); // the old full-price check would have rejected this
+    const account = (await inst.db.select().from(schema.account))[0];
+    expect(account.cash).toBeCloseTo(170_000 - 160_000, 6);
+
+    const inst2 = await freshDb('buy-boundary-poor.db'); // just below the discounted cost
+    await inst2.db.update(schema.account).set({ cash: 159_999.99, reputation: 30 });
+    await expectActionError(buyPlane(inst2, 'atr72'), 409, /insufficient funds/i);
+  });
 });
 
 describe('sellPlane', () => {
@@ -585,6 +626,39 @@ describe('refuelPlane', () => {
     await expectActionError(refuelPlane(inst, 'plane-starter'), 409, /insufficient funds/i);
   });
 
+  it('applies the reputation-scaled discount to the price term only, in both modes (v0.38.0)', async () => {
+    const inst = await freshDb('refuel-rep.db');
+    // Elevated rep → non-zero rate; expectations computed with the SAME helpers refuelPlane uses.
+    await inst.db.update(schema.account).set({ reputation: 30 });
+    const rate = repRate(30, FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT);
+    expect(rate).toBeGreaterThan(0);
+
+    // 'full': exact discounted cost, tank math untouched.
+    await inst.db.update(schema.planes).set({ fuel: 1_000 }).where(eq(schema.planes.id, 'plane-starter'));
+    const cashBefore = (await inst.db.select().from(schema.account))[0].cash;
+    const { cost } = await refuelPlane(inst, 'plane-starter');
+    expect(cost).toBe(Math.round((PLANE_TYPES.atr72.maxFuel - 1_000) * FUEL_PRICE_PER_L * (1 - rate) * 100) / 100);
+    const plane = (await inst.db.select().from(schema.planes))[0];
+    expect(plane.fuel).toBe(PLANE_TYPES.atr72.maxFuel); // target unchanged by the discount
+    expect((await inst.db.select().from(schema.account))[0].cash).toBeCloseTo(cashBefore - cost, 6);
+
+    // 'forFlight': same discount on the price term; burn/target math (wind factor, ×1.5 margin) untouched.
+    await insertOpenPackage(inst, 'p-ff-r', { destIcao: 'LEMD' }); // EDDF → LEMD
+    await loadPackage(inst, 'p-ff-r', 'plane-starter');
+    const required = await adjustedRequiredForHubToLemd();
+    const startFuel = Math.round(required / 2);
+    await inst.db.update(schema.planes).set({ fuel: startFuel }).where(eq(schema.planes.id, 'plane-starter'));
+    const cashBefore2 = (await inst.db.select().from(schema.account))[0].cash;
+
+    const { cost: ffCost } = await refuelPlane(inst, 'plane-starter', { mode: 'forFlight', packageId: 'p-ff-r' });
+
+    const targetFuel = Math.min(PLANE_TYPES.atr72.maxFuel, Math.max(startFuel, required * 1.5));
+    expect(ffCost).toBe(Math.round((targetFuel - startFuel) * FUEL_PRICE_PER_L * (1 - rate) * 100) / 100);
+    const plane2 = (await inst.db.select().from(schema.planes))[0];
+    expect(plane2.fuel).toBeCloseTo(targetFuel, 6); // topped up to exactly the 150% target
+    expect((await inst.db.select().from(schema.account))[0].cash).toBeCloseTo(cashBefore2 - ffCost, 6);
+  });
+
   it('rejects an unknown id with 404', async () => {
     const inst = await freshDb('refuel-unknown.db');
     await expectActionError(refuelPlane(inst, 'ghost'), 404);

lib/game/actions.ts

@@ -8,7 +8,16 @@ import { weatherFor } from '@/lib/weather';
 import { requiredFuelFor, windBurnFactor } from '@/lib/sim/movement';
 import { runAction } from '@/lib/sim/engine';
 import { getStateSnapshot, parseIcaoQueue } from './state';
-import { FUEL_PRICE_PER_L, PLANE_TYPES, SELL_FRACTION } from './catalog';
+import {
+  FUEL_DISCOUNT_PER_REP,
+  FUEL_PRICE_PER_L,
+  MAX_FUEL_DISCOUNT,
+  MAX_PLANE_DISCOUNT,
+  PLANE_DISCOUNT_PER_REP,
+  PLANE_TYPES,
+  repRate,
+  SELL_FRACTION,
+} from './catalog';
 import { abandonPenalty } from './penalty';
 import { HUB_ICAO } from './seed';
 
@@ -244,16 +253,19 @@ export async function ignorePackage(inst: GameDb, packageId: string): Promise<vo
 
 // --- Market (POST /api/market/buy-plane {model}) ---
 
-// Buy a catalog model at full price; it arrives 'available' with a full tank at
+// Buy a catalog model at its reputation-scaled price (v0.38.0, ISS-072 — discount grows with
-// the home base (EDDF).
+// reputation, exactly full price at the starting value); it arrives 'available' with a full tank
+// at the home base (EDDF).
 export async function buyPlane(inst: GameDb, model: string): Promise<{ planeId: string }> {
   const type = PLANE_TYPES[model];
   if (!type) throw new GameActionError(400, `unknown plane model "${model}"`);
 
   const account = (await inst.db.select().from(schema.account))[0];
   if (!account) throw new Error('account row missing');
-  if (account.cash < type.price) {
+  // v0.38.0 (ISS-072): the EFFECTIVE cost drives both the funds check and the deduction.
-    throw new GameActionError(409, `insufficient funds: a ${type.name} costs ${type.price}, you have ${Math.round(account.cash)}`);
+  const cost = Math.round(type.price * (1 - repRate(account.reputation, PLANE_DISCOUNT_PER_REP, MAX_PLANE_DISCOUNT)) * 100) / 100;
+  if (account.cash < cost) {
+    throw new GameActionError(409, `insufficient funds: a ${type.name} costs ${cost}, you have ${Math.round(account.cash)}`);
   }
 
   const fc = await loadAirportsGeoJson();
@@ -273,7 +285,7 @@ export async function buyPlane(inst: GameDb, model: string): Promise<{ planeId:
     lon: home.lon,
     departureSimTime: null,
   });
-  await inst.db.update(schema.account).set({ cash: account.cash - type.price });
+  await inst.db.update(schema.account).set({ cash: Math.round((account.cash - cost) * 100) / 100 });
   await persist(inst);
   return { planeId };
 }
@@ -376,9 +388,10 @@ export async function refuelPlane(inst: GameDb, planeId: string, opts: RefuelOpt
   }
 
   const liters = Math.max(0, targetFuel - plane.fuel);
-  const cost = Math.round(liters * FUEL_PRICE_PER_L * 100) / 100;
   const account = (await inst.db.select().from(schema.account))[0];
   if (!account) throw new Error('account row missing');
+  // v0.38.0 (ISS-072): rep-scaled discount on the PRICE term only — the burn/target math above is untouched.
+  const cost = Math.round(liters * FUEL_PRICE_PER_L * (1 - repRate(account.reputation, FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT)) * 100) / 100;
   if (cost > 0 && account.cash < cost) {
     throw new GameActionError(409, `insufficient funds: refueling costs ${cost}, you have ${Math.round(account.cash)}`);
   }

lib/game/catalog.test.ts

@@ -1,5 +1,6 @@
 import { describe, expect, it } from 'vitest';
-import { PLANE_TYPES, STARTER_MODEL } from './catalog';
+import { FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT, MAX_PLANE_DISCOUNT, PLANE_DISCOUNT_PER_REP, PLANE_TYPES, repRate, STARTER_MODEL } from './catalog';
+import { STARTING_REPUTATION } from './seed';
 
 // v0.28.0 (ISS-047) — catalog sanity: the progression ladder must stay well-formed as types are added.
 describe('PLANE_TYPES', () => {
@@ -22,3 +23,23 @@ describe('PLANE_TYPES', () => {
     expect(PLANE_TYPES[STARTER_MODEL]).toBeDefined();
   });
 });
+
+// v0.38.0 (ISS-072) — the shared rep-discount shape: linear above the starting value, capped.
+describe('repRate', () => {
+  it('is exactly 0 at and below the starting reputation', () => {
+    expect(repRate(STARTING_REPUTATION, PLANE_DISCOUNT_PER_REP, MAX_PLANE_DISCOUNT)).toBe(0);
+    expect(repRate(0, PLANE_DISCOUNT_PER_REP, MAX_PLANE_DISCOUNT)).toBe(0);
+    expect(repRate(-5, FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT)).toBe(0); // below-start clamps too
+  });
+
+  it('is linear in reputation above the starting value (exact mid-range values)', () => {
+    expect(repRate(STARTING_REPUTATION + 10, PLANE_DISCOUNT_PER_REP, MAX_PLANE_DISCOUNT)).toBeCloseTo(0.1, 12); // 0.01 × 10
+    expect(repRate(STARTING_REPUTATION + 30, PLANE_DISCOUNT_PER_REP, MAX_PLANE_DISCOUNT)).toBeCloseTo(0.3, 12); // 0.01 × 30
+    expect(repRate(STARTING_REPUTATION + 40, FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT)).toBeCloseTo(0.2, 12); // 0.005 × 40 = cap
+  });
+
+  it('clamps at the cap', () => {
+    expect(repRate(STARTING_REPUTATION + 50, PLANE_DISCOUNT_PER_REP, MAX_PLANE_DISCOUNT)).toBe(MAX_PLANE_DISCOUNT); // 0.5 → capped to 0.4
+    expect(repRate(1_000_000, FUEL_DISCOUNT_PER_REP, MAX_FUEL_DISCOUNT)).toBe(MAX_FUEL_DISCOUNT);
+  });
+});

lib/game/catalog.ts

@@ -1,5 +1,9 @@
+import { STARTING_REPUTATION } from './seed';
+
 // Aircraft catalog — in-code constants for now (no DB table yet). One type is
 // enough for the MVP; add more entries to PLANE_TYPES as they are designed.
+// ponytail: circular import with seed.ts is safe — neither module touches the other's
+// bindings at top level, only inside function bodies.
 
 export interface PlaneType {
   id: string;
@@ -102,6 +106,22 @@ export const FUEL_PRICE_PER_L = 0.8;
 // Fraction of the catalog price paid out when selling a plane (v0.8.0).
 export const SELL_FRACTION = 0.5;
 
+// Shared rep-discount shape (v0.38.0, ISS-072): linear in reputation above the starting value,
+// capped — exactly 0 at/below STARTING_REPUTATION so default-rep behavior is unchanged.
+export function repRate(reputation: number, perPoint: number, cap: number): number {
+  return Math.min(cap, perPoint * Math.max(0, reputation - STARTING_REPUTATION));
+}
+
+// ponytail: balance-tunable — plane purchase discount per rep point above the starting value.
+export const PLANE_DISCOUNT_PER_REP = 0.01;
+// ponytail: balance-tunable — max plane purchase discount (reached at rep ≥ 50).
+export const MAX_PLANE_DISCOUNT = 0.4;
+
+// ponytail: balance-tunable — refuel price discount per rep point above the starting value.
+export const FUEL_DISCOUNT_PER_REP = 0.005;
+// ponytail: balance-tunable — max refuel price discount (reached at rep ≥ 50).
+export const MAX_FUEL_DISCOUNT = 0.2;
+
 // Snapshot shape of one catalog entry in GET /api/state (v0.10.0): `model` is the
 // id used by buy/dispatch, `label` the display name — clients compute all market
 // previews (buy price, sell payout, refuel cost) from these + the economy constants.

lib/game/seed.test.ts

@@ -1,10 +1,12 @@
 import { describe, expect, it } from 'vitest';
 import { haversineKm } from '@/lib/geo';
-import { PLANE_TYPES, STARTER_MODEL } from './catalog';
+import { PLANE_TYPES, repRate, STARTER_MODEL } from './catalog';
 import { SPECIALS } from './specials';
 import {
   BASE_REWARD,
   buildSeed,
+  JOB_BONUS_PER_REP,
+  MAX_JOB_BONUS,
   PACKAGE_COUNT_MAX,
   PACKAGE_COUNT_MIN,
   generatePackage,
@@ -298,4 +300,38 @@ describe('generatePackage (shared seed/spawn builder)', () => {
       expect(countDraws()).toBeGreaterThanOrEqual(7); // pickSpecial draws 1–2 extra
     });
   });
+
+  describe('reputation job bonus (v0.38.0, ISS-072)', () => {
+    it('multiplies the reward by 1 + repRate at elevated reputation', () => {
+      const c = generatePackage({ id: 'c-rep', airports: AIRPORTS, rng: mulberry32(42), nowMs: NOW, originIcao: 'EDDF', destIcao: 'EHAM', weightKg: 1_000, special: null, reputation: 60 });
+      const km = haversineKm(AIRPORTS[0].lat, AIRPORTS[0].lon, AIRPORTS[1].lat, AIRPORTS[1].lon); // EDDF → EHAM
+      expect(repRate(60, JOB_BONUS_PER_REP, MAX_JOB_BONUS)).toBeCloseTo(0.5, 12); // rep 60 → ×1.5
+      expect(c.reward).toBe(Math.round(rewardFor(km, 1_000) * (1 + repRate(60, JOB_BONUS_PER_REP, MAX_JOB_BONUS))));
+    });
+
+    it('defaults to the starting reputation when omitted — byte-identical output', () => {
+      const a = generatePackage({ id: 'c-r0', airports: AIRPORTS, rng: mulberry32(42), nowMs: NOW });
+      const b = generatePackage({ id: 'c-r0', airports: AIRPORTS, rng: mulberry32(42), nowMs: NOW, reputation: STARTING_REPUTATION });
+      expect(a).toEqual(b); // no bonus at the starting value
+    });
+
+    it('composes with the special multiplier (base × jobBonus × special)', () => {
+      const c = generatePackage({ id: 'c-rep-sp', airports: AIRPORTS, rng: mulberry32(42), nowMs: NOW, originIcao: 'EDDF', destIcao: 'EHAM', weightKg: 1_000, special: 'priority', reputation: 60 });
+      const km = haversineKm(AIRPORTS[0].lat, AIRPORTS[0].lon, AIRPORTS[1].lat, AIRPORTS[1].lon); // EDDF → EHAM
+      expect(c.reward).toBe(
+        Math.round(rewardFor(km, 1_000) * (1 + repRate(60, JOB_BONUS_PER_REP, MAX_JOB_BONUS)) * SPECIALS.priority.rewardMultiplier),
+      );
+    });
+
+    it('consumes no extra RNG draw', () => {
+      const countDraws = (reputation?: number): number => {
+        let n = 0;
+        const base = mulberry32(42);
+        generatePackage({ id: 'c-rep-n', airports: AIRPORTS, rng: () => { n += 1; return base(); }, nowMs: NOW, special: null, reputation });
+        return n;
+      };
+      expect(countDraws()).toBe(6); // forced-null special → the fixed order minus the appended draw
+      expect(countDraws(60)).toBe(6); // the rep hook consumes no draws
+    });
+  });
 });

lib/game/seed.ts

@@ -1,5 +1,5 @@
 import { haversineKm } from '@/lib/geo';
-import { PLANE_TYPES, STARTER_MODEL } from './catalog';
+import { PLANE_TYPES, repRate, STARTER_MODEL } from './catalog';
 import { pickSpecial, SPECIALS } from './specials';
 
 // First-run seed. Everything here is a pure function of (airports, rng, nowMs)
@@ -92,6 +92,13 @@ export const BASE_REWARD = 500;
 export const REWARD_PER_KM = 2.5;
 export const REWARD_PER_KG = 0.5;
 
+// Job reward bonus (v0.38.0, ISS-072): reward ×= 1 + repRate(reputation, …) — better jobs at
+// higher reputation, exactly ×1 at the starting value.
+// ponytail: balance-tunable — job reward bonus per rep point above the starting value.
+export const JOB_BONUS_PER_REP = 0.01;
+// ponytail: balance-tunable — max job reward bonus (up to ×2 at rep ≥ 110).
+export const MAX_JOB_BONUS = 1.0;
+
 // Package deadlines: now + a plausible game-time window of 6–72 hours.
 const DEADLINE_MIN_HOURS = 6;
 const DEADLINE_MAX_HOURS = 72;
@@ -127,6 +134,9 @@ export function rewardFor(km: number, weightKg: number): number {
 // jitter draw, same pattern as forced endpoints.
 // v0.37.0 (ISS-073): special optionally FORCES the special status (string or explicit null) —
 // it skips the appended pickSpecial draw; otherwise ~SPECIAL_SPAWN_CHANCE of packages roll one.
+// v0.38.0 (ISS-072): reputation optionally scales the reward (×(1 + repRate)) at the same spot
+// as the special multiplier — a pure input, it consumes NO RNG draws and defaults to the
+// starting value so seed-time behavior is byte-identical.
 export function generatePackage(input: {
   id: string;
   airports: SeedAirport[];
@@ -137,6 +147,7 @@ export function generatePackage(input: {
   destIcao?: string;
   weightKg?: number;
   special?: string | null;
+  reputation?: number;
 }): SeedPackage {
   const { airports, rng, nowMs } = input;
   if (airports.length < 2) throw new Error('package generation needs at least two airports');
@@ -181,11 +192,14 @@ export function generatePackage(input: {
   // Forced deadlines skip the special scaling — consistent with overrides skipping draws.
   const deadlineMs = input.deadlineOffsetMs ?? drawnWindowMs * (mods?.deadlineScale ?? 1);
 
+  // v0.38.0 (ISS-072): reputation bonus composed with the special multiplier, single round at the end.
+  const repBonus = 1 + repRate(input.reputation ?? STARTING_REPUTATION, JOB_BONUS_PER_REP, MAX_JOB_BONUS);
+
   return {
     id: input.id,
     originIcao: origin.icao,
     destIcao: dest.icao,
-    reward: Math.round(rewardFor(km, weightKg) * (mods?.rewardMultiplier ?? 1)),
+    reward: Math.round(rewardFor(km, weightKg) * repBonus * (mods?.rewardMultiplier ?? 1)),
     cargoType,
     cargoCount,
     weightKg,

lib/openapi.ts

@@ -306,7 +306,7 @@ export const openApiSpec = {
       post: {
         summary: 'Buy a plane from the market',
         description:
-          'Buy an aircraft at its full catalog price (v0.8.0). The new plane arrives "available" with a full tank at the home base (EDDF). Only models in the in-code catalog are known.',
+          'Buy an aircraft at its catalog price minus a reputation-scaled discount (v0.38.0, ISS-072 — higher reputation buys cheaper; no discount at the starting reputation). The new plane arrives "available" with a full tank at the home base (EDDF). Only models in the in-code catalog are known.',
         operationId: 'buyPlane',
         requestBody: {
           required: true,
@@ -370,7 +370,7 @@ export const openApiSpec = {
       post: {
         summary: 'Refuel a grounded plane',
         description:
-          'Refuel a grounded plane at the fuel price per added liter, deducted from cash (v0.8.0). The body is optional (v0.16.0): no body or mode "full" fills to maxFuel; mode "forFlight" with packageId buys 150% of the weather-adjusted fuel required for that loaded package\'s destination leg, capped at tank capacity — liters = min(maxFuel, max(current fuel, 1.5 × required)) − current fuel, where required is the weight-proportional burn model over the great-circle distance with a ±20% wind adjustment (v0.36.0).',
+          'Refuel a grounded plane at the fuel price per added liter, deducted from cash (v0.8.0); the per-liter price is reduced by a reputation-scaled discount (v0.38.0, ISS-072 — higher reputation refuels cheaper; no discount at the starting reputation). The body is optional (v0.16.0): no body or mode "full" fills to maxFuel; mode "forFlight" with packageId buys 150% of the weather-adjusted fuel required for that loaded package\'s destination leg, capped at tank capacity — liters = min(maxFuel, max(current fuel, 1.5 × required)) − current fuel, where required is the weight-proportional burn model over the great-circle distance with a ±20% wind adjustment (v0.36.0).',
         operationId: 'refuelPlane',
         parameters: [
           { name: 'planeId', in: 'path', required: true, schema: { type: 'string' } },
@@ -476,7 +476,7 @@ export const openApiSpec = {
             description: 'Aircraft catalog (v0.10.0) — static per build, one entry per plane type.',
             items: { $ref: '#/components/schemas/CatalogEntry' },
           },
-          fuelPricePerL: { type: 'number', description: 'Jet-A1 price in €/liter; refuel cost = (maxFuel − fuel) × this.' },
+          fuelPricePerL: { type: 'number', description: 'Jet-A1 price in €/liter; refuel cost = (maxFuel − fuel) × this, reduced by a reputation-scaled discount at refuel time (v0.38.0).' },
           sellFraction: { type: 'number', description: 'Fraction of the catalog price paid out when selling a plane.' },
         },
         required: ['account', 'simState', 'planes', 'packages', 'catalog', 'fuelPricePerL', 'sellFraction'],
@@ -486,7 +486,7 @@ export const openApiSpec = {
         properties: {
           model: { type: 'string', description: 'Catalog model id (e.g. "atr72") — used by buy/fly.' },
           label: { type: 'string', description: 'Display name (e.g. "ATR 72-600").' },
-          price: { type: 'number', description: 'Market price in € (buy cost; sell pays out sellFraction × this).' },
+          price: { type: 'number', description: 'Market price in € — the full catalog list price. Buying costs this minus a reputation-scaled discount at purchase time (v0.38.0); selling pays out sellFraction × this.' },
           maxFuel: { type: 'number', description: 'Fuel capacity, liters.' },
           burnPerKm: { type: 'number', description: 'Cruise fuel burn at a full tank, liters/km (v0.16.0 weighted model calibrates to this). Actual per-leg burn varies ±20% with wind — departure weather vs route heading (v0.36.0).' },
           emptyWeightKg: { type: 'number', description: 'Operating empty weight, kg — with burnPerKm and maxFuel it drives the v0.16.0 weight-proportional burn model.' },
@@ -499,7 +499,7 @@ export const openApiSpec = {
         type: 'object',
         properties: {
           cash: { type: 'number' },
-          reputation: { type: 'number' },
+          reputation: { type: 'number', description: 'Reputation — grows with delivered packages; drives the purchase/fuel discounts and job reward quality (v0.38.0, ISS-072).' },
         },
         required: ['cash', 'reputation'],
       },

lib/sim/engine.ts

@@ -269,9 +269,14 @@ export async function spawnOpenPackages(
     lon: f.properties.lon,
   }));
   const rand = rng ?? mulberry32(randomInt(0, 2 ** 31));
+  // v0.38.0 (ISS-072): spawned jobs carry the account's CURRENT reputation quality — read once per spawn batch.
+  const account = (await inst.db.select().from(schema.account))[0];
+  if (!account) throw new Error('account row missing');
 
   for (let i = 0; i < needed; i++) {
-    await inst.db.insert(schema.packages).values(generatePackage({ id: randomUUID(), airports, rng: rand, nowMs: clockMs }));
+    await inst.db.insert(schema.packages).values(
+      generatePackage({ id: randomUUID(), airports, rng: rand, nowMs: clockMs, reputation: account.reputation }),
+    );
   }
   return needed;
 }
@@ -313,12 +318,15 @@ export async function spawnCoveragePackages(
     lon: f.properties.lon,
   }));
   const rand = rng ?? mulberry32(randomInt(0, 2 ** 31));
+  // v0.38.0 (ISS-072): same reputation quality as spawnOpenPackages — read once per batch.
+  const account = (await inst.db.select().from(schema.account))[0];
+  if (!account) throw new Error('account row missing');
 
   let n = 0;
   for (const icao of missing) {
     if (!airports.some((a) => a.icao === icao)) continue; // defensive — the dataset is the source of all ICACs
     await inst.db.insert(schema.packages).values(
-      generatePackage({ id: randomUUID(), airports, rng: rand, nowMs: clockMs, originIcao: icao }),
+      generatePackage({ id: randomUUID(), airports, rng: rand, nowMs: clockMs, originIcao: icao, reputation: account.reputation }),
     );
     n++;
   }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "flight-ops",
-  "version": "0.37.0",
+  "version": "0.38.0",
   "private": true,
   "scripts": {
     "dev": "next dev -p 3000",