CodeSampleX

Sample

verify pkg:npm/%40jest/expect-utils@30.4.1

sha256:87dc3b9ff439166867e3c274f7f11e57ed58d2854e45a3e627d749d616f51c76

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…		 2026-08-27

Case

HOW
Goal
verify pkg:npm/%40jest/expect-utils@30.4.1
Packages
Environment
node 22.23.2
Created
2026-08-27T22:44:00Z

Contract

  1. equals performs deep structural equality check on primitives, nested objects, and arrays
  2. equals handles circular references without infinite recursion
  3. equals supports custom tester functions for specialized value comparisons
  4. equals with strictCheck true distinguishes between undefined properties and omitted properties
  5. isA verifies object type tags matching standard constructor names
  6. isError returns true for Error instances and false for non-error values
  7. emptyObject returns true for empty objects or empty arrays and false for non-empty structures
  8. getObjectKeys extracts own enumerable string keys from objects
  9. getObjectSubset extracts matching properties and subsets from complex nested structures
  10. getPath traverses nested object hierarchies with dot notation and returns traversed value and metadata
  11. pathAsArray decomposes dot and bracket property paths into path segment arrays
  12. partition splits an array into two arrays based on a predicate function
  13. iterableEquality evaluates equality for Sets and Maps independent of insertion order where applicable
  14. arrayBufferEquality compares ArrayBuffer contents byte by byte

Files

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

Download the source artifact (tar.gz)

Origin Seeder

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