Incident Dossier

The Price That Refused to Update

Friday deploy. Growth flips a sale price from $19.99 to $14.99. Merchants confirm the admin UI. Support still gets screenshots of $19.99 for the next twenty minutes. Cache dashboards are green. Nobody looks at the write path.

Initial failing signalReaders still see the pre-update priceExpected behavior: After the price update, readers see 1500. · actual behavior: After the price update, readers still see 1000.

Progress

1Reproduce the bugRun checks

2Edit the fixOpen

3Pass checksOpen

4Submit fixOpen

Reproduction Steps

Warm the cache with loadFromSource.
Call setPrice with a new amount.
Call getPrice for the same product.
Notice the read never saw the write.

Focus Mode

Start

src/storefront-api.js
src/price-cache.js

Likely area

src/price-cache.js
src/storefront-api.js
src/catalog.js

Challenge Coach

Hints reveal broad direction first, then narrow toward the suspect path without showing hidden tests or exact solution code.

TopicCaching & Performance

DifficultyEasy

Est. time12 min

Workspacepreparing

Explorer

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Evidence Map

Failing signal loaded from challenge API
Workspace files loaded from workspace API
Results rendered only after API run/submit

Autosaved

workspace

Outputread-onlyready$ prepare workspace

Preparing workspace