CodeSampleX

Sample

define properties on object conditionally with predicates and support descriptor flags

sha256:d365222abe961312521639edda7754eba1be4816d95a68bb649c8ae25e53d493

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…
2026-08-26

Case

HOW
Goal
define properties on object conditionally with predicates and support descriptor flags
Packages
Symbols
  • defineProperties
  • defineProperties.supportsDescriptors
Created
2026-08-26T09:01:31Z

Contract

  1. defineProperties defines non-enumerable, writable, configurable properties on target object
  2. defineProperties preserves existing properties when predicates are not provided or falsy
  3. defineProperties overwrites existing properties when predicate is boolean true and value differs
  4. defineProperties overwrites existing properties when predicate function returns truthy
  5. defineProperties does not overwrite existing properties when predicate function returns falsy
  6. defineProperties supports symbol keyed properties on target object
  7. defineProperties.supportsDescriptors is a boolean indicating descriptor support

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous