Sample
QueryClient.ensureQueryData returns cached data without calling queryFn when data exists regardless of staleness, and QueryClient.setQueryData treats undefined updater returns as a no-op bailout.
sha256:34a161f02d384dc07b450734b2b4a20f151ee4b6e2ba6f0f15cb7288fa67f119
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
Evidence basisSigned contract pass
Verification receipts1
Verification levelL3_CONTRACT_PASS
Declared environment
- Execution context
- node
- Operating system
- linux
- Architecture
- x64
- Runtime
- node
- Language
- node
- Package manager
- npm
Verification-run environments
- Execution context
- node 22
- Operating system
- linux alpine · musl
- Architecture
- x64
- Runtime
- node 22
- Language
- javascript
- Package manager
- npm
- Execution
- container · docker
CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17
Case
- Goal
- QueryClient.ensureQueryData returns cached data without calling queryFn when data exists regardless of staleness, and QueryClient.setQueryData treats undefined updater returns as a no-op bailout. HOW
- Packages
-
@tanstack/query-core 5.90.20
- Environment
- node
- Created
- 2026-08-17T07:32:45Z
Commonly assumed
QueryClient.ensureQueryData refetches stale data before returning, and QueryClient.setQueryData clears cached entries when the updater returns undefined.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- QueryClient.ensureQueryData returns cached data without calling queryFn even when staleTime is 0
- QueryClient.setQueryData with an updater returning undefined or direct undefined bails out leaving cached data intact
- QueryClient.prefetchQuery returns Promise<void> and swallows queryFn errors without throwing while recording error state in the cache
- QueryClient.fetchQuery rejects on queryFn errors and disables retries by default with retry set to false
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs
Download the source artifact (tar.gz)
Origin Seeder
csx-seed
Verification receipts
- node 22 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9