CodeSampleX

Sample

define data property on object with custom descriptor attributes

sha256:d53e78c0c1b3d361623f983bc6d8b45e12a29efc3a18d7320c4aa6b950de8a99

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

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…		 2026-08-26

Case

HOW
Goal
define data property on object with custom descriptor attributes
Packages
Symbols
  • defineDataProperty
Environment
node 22.23.2
Created
2026-08-26T09:00:43Z

Contract

  1. defines basic data property with default enumerable, writable, and configurable attributes
  2. defines non-enumerable property when nonEnumerable is true
  3. defines non-writable property when nonWritable is true
  4. defines non-configurable property when nonConfigurable is true
  5. defines data property on object using Symbol property keys
  6. preserves existing property descriptor flags when null is passed for attribute flags
  7. throws TypeError when target object or property name is invalid

Files

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

Download the source artifact (tar.gz)

Origin Seeder

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