Gallery Exchange Summon

A live USD–JPY rate determines the rarity frame and interpretation of a summoned public-domain museum work.

Creation: creation_afb91690b77437759b045bdb18596651
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
Novelty delta: The exchange rate acts as a game rule that transforms an artwork reveal, making finance and museum data causally inseparable.

Causal chain

1. frankfurterConvert the live rate into a rarity tier, star count, and reveal intensity.
2. met-museumReveal the selected artwork inside the rate-derived rarity frame and interpretation.

API roles

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

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

Cartridge receipt

Palette: jewel gradients, rarity gold, midnight violet, holographic cyan

Typography: bold mobile display face, rarity stars, compact result labels

Motion: capsule shake, reveal burst, rarity shimmer, banner snap

Era: mobile character summon screen and limited-event banner

Caution: No manipulative purchases, fake currency, timers, or dark patterns; one honest free interaction.