CodeSampleX

Sample

verify pkg:npm/assertion-error@2.0.1

sha256:583de67237db6af7beaf6bdf4d5f6188d9b3f15276735390f14eb67992671a76

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
verify pkg:npm/assertion-error@2.0.1
Packages
Symbols
  • AssertionError
  • AssertionResult
Created
2026-08-26T09:21:41Z

Contract

  1. AssertionError extends Error with name 'AssertionError' and ok false
  2. AssertionError attaches extra properties passed via constructor props argument
  3. AssertionError.toJSON() serializes name, ok, message, extra props, and stack
  4. AssertionResult has name 'AssertionResult' and ok true without extending Error

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous