working through a review

scripts/check-dice.ts

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+// ponytail: runnable self-check for the dice-notation parser. Not part of
+// the app build (scripts/ is outside tsconfig.app's include). Run with:
+//   node scripts/check-dice.ts
+import { demo } from "../src/lib/dice.ts";
+demo();

scripts/check-encounter-budget.ts

@@ -0,0 +1,5 @@
+// ponytail: runnable self-check for the encounter XP-budget math. Not part
+// of the app build (scripts/ is outside tsconfig.app's include). Run with:
+//   node scripts/check-encounter-budget.ts
+import { demo } from "../src/lib/encounter-budget.ts";
+demo();