RANDOMWARE KEEPER SPEC
Creation: creation_afb91690b77437759b045bdb18596651
Name: Gallery Exchange Summon
Premise: A live USD–JPY rate determines the rarity frame and interpretation of a summoned public-domain museum work.
Player action: Press SUMMON, then adjust the confidence slider to see the exchange rate reshape the artwork’s rarity and reading.
Style cartridge: ✨ Gacha App (gacha-app)
Style palette: jewel gradients, rarity gold, midnight violet, holographic cyan
Style typography: bold mobile display face, rarity stars, compact result labels
Style motion: capsule shake, reveal burst, rarity shimmer, banner snap
Style era: mobile character summon screen and limited-event banner
Style caution: No manipulative purchases, fake currency, timers, or dark patterns; one honest free interaction.

Causal chain:
1. frankfurter: Convert the live rate into a rarity tier, star count, and reveal intensity.
2. met-museum: Reveal the selected artwork inside the rate-derived rarity frame and interpretation.

API roles:
- frankfurter: Supplies the live numeric signal that governs rarity, stars, glow, and the interpretive rule applied to the artwork. [rates]
- met-museum: Supplies the public-domain artwork, image, title, artist, and object metadata that become the summoned collectible. [object]

Dependency:
frankfurter -> rules -> met-museum: The USD–JPY rate directly changes the rarity tier, visual treatment, and interpretive caption used for the museum object.

Interaction:
Controls: SUMMON button, confidence slider, REVEAL DETAILS button
Outcome: The capsule opens into an artwork card whose rarity, stars, glow, and caption change with the live rate and slider.

Visual direction:
Style: mobile gacha summon screen with capsule chamber and collectible reveal card
Palette: midnight violet, jewel gradients, rarity gold, holographic cyan
Typography: bold mobile display lettering, rarity stars, compact result labels
Motion: capsule shake, reveal burst, rarity shimmer, banner snap

Novelty delta: The exchange rate acts as a game rule that transforms an artwork reveal, making finance and museum data causally inseparable.