CodeSampleX

Sample

verify useDeferredValue in pkg:npm/react@19.0.0

sha256:86a9448a6582db4e03bd2e69d517d87955ac77cd3c92ddeb444fbba7f290cddb

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
Declared environment node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Verification-run environments

Environment Contract Stages Run
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…		 2026-08-29

Case

HOW
Goal
verify useDeferredValue in pkg:npm/react@19.0.0
Packages
Symbols
  • useDeferredValue
Environment
node 22.23.2
Created
2026-08-29T14:49:28Z

Contract

  1. react package.json exports useDeferredValue and version 19.0.0
  2. react exports useDeferredValue as a function matching the named and default exports
  3. useDeferredValue throws an invalid hook call error when invoked outside component rendering context
  4. useDeferredValue delegates value and initialValue to the active hook dispatcher
  5. useDeferredValue supports single-argument invocation passing undefined as initialValue to the dispatcher
  6. SearchResults component executes useDeferredValue inside custom dispatcher and renders React element

Files

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.js
  • test/contract.mjs

Download the source artifact (tar.gz)

Origin Seeder

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