feat: add stature potions and tiny-player launchers

2026-09-04 11:28:24 -04:00
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+---
+type: User Story
+title: "US-001: Drink a Potion of Shifting Stature"
+description: Let players craft and drink a potion that gives them a random configured scale.
+status: done
+---
+
+# US-001: Drink a Potion of Shifting Stature
+
+As a **player**, I want to drink a craftable potion that changes my stature unpredictably so that player size becomes a fun survival mechanic.
+
+## Acceptance criteria
+
+- [x] The distinct potion is authenticated with persistent item metadata rather than its display name alone.
+- [x] Its shaped recipe is `ACA/AWA/ACA`, where `A` is Amethyst Shard, `C` is Chorus Fruit, and `W` is an Awkward Potion.
+- [x] Drinking it consumes one potion, leaves normal bottle handling intact, and selects a scale from the configured inclusive range.
+- [x] Outcomes are uniformly selected in configured adjustment-step increments, including both endpoints when aligned.
+- [x] The resulting Minecraft scale attribute is applied and reported to the player.
+- [x] The resulting scale persists across logout, restart, world change, and death.
+- [x] Automated tests cover bounds, endpoint reachability, and recipe identity.
+
+## Related
+
+- [US-002: Make precise stature adjustments](us-002-adjust-stature.md)
+- [US-004: Configure and persist stature behavior](us-004-configure-and-persist.md)