CodeSampleX

Sample

verify @types/js-yaml.exports in pkg:npm/%40types/js-yaml@4.0.9

sha256:e43c71898e34cd24fe2e7529d2d2ff8a911bafbdc5c92f8978f9076033c178a2

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…		 2026-08-26

Case

HOW
Goal
verify @types/js-yaml.exports in pkg:npm/%40types/js-yaml@4.0.9
Packages
Symbols
  • @types/js-yaml.exports
Environment
node 22.23.2
Created
2026-08-26T12:27:29Z

Contract

  1. package.json defines an exports field containing root '.' and './package.json' entry points
  2. exports['.'] defines TypeScript conditional types mapping with 'import' pointing to './index.d.mts' and 'default' pointing to './index.d.ts'
  3. exports['./package.json'] resolves to './package.json' allowing package metadata introspection
  4. The referenced index.d.ts declaration file exists and defines core exports (load, loadAll, dump, Type, Schema, FAILSAFE_SCHEMA, JSON_SCHEMA, CORE_SCHEMA, DEFAULT_SCHEMA, YAMLException)
  5. The referenced index.d.mts declaration file exists and provides ESM re-exports for TypeScript module resolution
  6. The legacy 'types' field in package.json points to 'index.d.ts' for backwards compatibility with legacy resolution modes

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous