CodeSampleX

Sample

yaml 2.9.0: Parser, Composer, CST

Verified sample for npm yaml 2.9.0: Parser, Composer, CST. The contract ran on node 22 · linux alpine/x64 · docker and passed: assert yaml.Parser parses YAML…

sha256:2c86c0ab59d5d41f8708d524ff081327ffc6f3c1c565356f8b9608b9040e2ab5

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 wsl

Verification-run environments

Environment Contract Stages Run
node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1		 2026-08-19

Case

HOW
Goal
verify pkg:npm/yaml@2.9.0
Packages
Symbols
  • yaml.Parser
  • yaml.Composer
  • yaml.CST
  • yaml.isDocument
  • yaml.isCollection
Created
2026-08-19T09:36:26Z

Contract

  1. assert yaml.Parser parses YAML text into CST tokens with token type and structure
  2. assert yaml.Composer composes CST tokens into Document AST instances and supports node lookup
  3. assert yaml.Parser and yaml.Composer parse and compose multi-document YAML streams into multiple Document instances
  4. assert yaml.CST.stringify serializes CST tokens back to YAML text directly
  5. assert yaml.isDocument type guard returns true for Document instances and false for non-Document nodes
  6. assert yaml.isCollection type guard returns true for collection AST nodes and false for scalar or primitive values

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous