---
type: User Story
title: "US-002: Make precise stature adjustments"
description: Let players craft upgraded potions that increase or decrease scale by one configured step.
status: done
---

# US-002: Make precise stature adjustments

As a **player**, I want more expensive growth and diminution potions so that I can adjust my stature predictably.

## Acceptance criteria

- [x] The Potion of Growth uses `GAG/ASA/GRG`, where `G` is Gold Ingot, `A` is Amethyst Shard, `S` is an authenticated Potion of Shifting Stature, and `R` is Rabbit's Foot.
- [x] The Potion of Diminution uses `GAG/ASA/GFG`, where `F` is Fermented Spider Eye.
- [x] Each resulting potion has distinct persistent metadata.
- [x] Growth adds one configured adjustment step and clamps at the maximum.
- [x] Diminution subtracts one configured adjustment step and clamps at the minimum.
- [x] Adjusted scales are reported and persisted under the same rules as random stature.
- [x] Automated tests cover adjustment, clamping, and potion identity.

## Related

- [US-001: Drink a Potion of Shifting Stature](us-001-drink-shifting-stature-potion.md)