CodeSampleX

Sample

verify pkg:npm/react-is@17.0.2

sha256:15465abc987389a7f90fd756c6d92ec0a682aac2d872c24b519e661a561bfb82

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 linux 24 · ubuntu · glibc 2.39 x64 npm

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…		 2026-08-27

Case

HOW
Goal
verify pkg:npm/react-is@17.0.2
Packages
Symbols
  • react-is.isContextConsumer
  • react-is.isContextProvider
  • react-is.isElement
  • react-is.isForwardRef
  • react-is.isFragment
  • react-is.isLazy
  • react-is.isMemo
  • react-is.isPortal
  • react-is.isProfiler
  • react-is.isStrictMode
  • react-is.isSuspense
  • react-is.isValidElementType
  • react-is.typeOf
Created
2026-08-27T14:58:28Z

Contract

  1. isElement correctly identifies React element objects and rejects plain objects or primitives
  2. isValidElementType validates built-in tags, component functions, classes, and React symbols
  3. isFragment detects React Fragment elements with react.fragment type
  4. isContextConsumer detects elements created from React Context Consumer types
  5. isContextProvider detects elements created from React Context Provider types
  6. isForwardRef detects elements created from react.forward_ref component types
  7. isLazy detects elements created from react.lazy component types
  8. isMemo detects elements created from react.memo wrapped components
  9. isPortal detects React portal objects with react.portal type
  10. isProfiler detects React profiler elements with react.profiler type
  11. isStrictMode detects React strict mode elements with react.strict_mode type
  12. isSuspense detects React suspense elements with react.suspense type
  13. typeOf returns standard React type symbols for elements or undefined for non-elements

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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