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

lib/game/specials.ts

@@ -0,0 +1,34 @@
+// Special-status registry (v0.37.0, ISS-073) — data-driven package modifiers: one entry per
+// special status maps to reward/deadline/reputation tweaks applied at generation and delivery.
+// Adding or removing a special is an edit of ONE entry here — no scattered branches elsewhere.
+import type { Rng } from './seed';
+
+export interface SpecialModifiers {
+  // Multiplier on the base reward (applied at package generation).
+  rewardMultiplier: number;
+  // Scale factor on the drawn deadline window (applied at generation; forced offsets skip it).
+  deadlineScale: number;
+  // Flat reputation bonus added to the distance-based gain at delivery.
+  repBonus: number;
+}
+
+export const SPECIALS: Record<string, SpecialModifiers> = {
+  priority: {
+    rewardMultiplier: 1.5, // ponytail: balance-tunable — a 50% premium for the tighter deadline below
+    deadlineScale: 0.5, // ponytail: balance-tunable — half the normal 6–72h window (3–36h)
+    repBonus: 0.5, // ponytail: balance-tunable — flat rep on top of the distance-based gain at delivery
+  },
+};
+
+// Fraction of generated packages that roll a special status (v0.37.0).
+export const SPECIAL_SPAWN_CHANCE = 0.15;
+
+// Pure spawn helper: one chance draw, then a uniform pick among the registry's keys. The registry
+// is a PARAM defaulting to the real one so tests can pass a filtered/empty record — removing an
+// entry cleanly disables that status (an empty registry consumes no draws at all).
+export function pickSpecial(rng: Rng, registry: Record<string, SpecialModifiers> = SPECIALS): string | null {
+  const keys = Object.keys(registry);
+  if (keys.length === 0) return null;
+  if (rng() >= SPECIAL_SPAWN_CHANCE) return null;
+  return keys[Math.floor(rng() * keys.length)];
+}