CodeSampleX

Sample

verify js-yaml.load in pkg:npm/js-yaml@4.1.0

sha256:65ea4d5b1a46193b007805523740c2971c59c60588f1ecd89996ef4c2a9e3367

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…
2026-08-28

Case

HOW
Goal
verify js-yaml.load in pkg:npm/js-yaml@4.1.0
Packages
Symbols
  • js-yaml.load
Environment
node 22.23.2
Created
2026-08-28T03:39:00Z

Contract

  1. yaml.load parses YAML mapping, sequence, and scalar types into JavaScript values
  2. yaml.load returns undefined for empty input string
  3. yaml.load returns null for comment-only input or explicit null/tilde scalar
  4. yaml.load throws YAMLException when stream contains multiple documents
  5. yaml.load throws YAMLException on duplicate mapping keys by default
  6. yaml.load allows duplicate mapping keys when json option is enabled
  7. yaml.load respects schema option such as FAILSAFE_SCHEMA preserving scalar strings
  8. yaml.load invokes custom listener callback during parsing
  9. yaml.load throws YAMLException on invalid YAML syntax

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous