CodeSampleX

Sample

verify pkg:npm/yaml@2.9.0

sha256:bfd86be85011a93252c4c081f41acf1318759e441a48c6f54fe78b56fb62e1ee

Publication state. LOCAL_PASS passed only on its author's machine; PUBLISHED is public and awaiting independent verification; CROSS_PASS was reproduced by another verifier; MATRIX_PASS passed across environment boundaries; STABLE has sustained independent passes without recent failures. Evidence strength. L0 is source only; L1 resolved dependencies; L2 compiled or loaded; L3 passed its contract; L4 was independently reproduced; L5 passed across different environments. MIT-0

Execution evidence

Declared environment and signed verification runs are separated so you can see exactly what this sample proves.

Evidence basis
Independent cross-verification
Verification receipts
1
Verification level
L4_CROSS_PASS
Declared environment windows 11 x64 npm

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.parse
  • YAML.stringify
  • YAML.parseDocument
  • YAML.Document
Created
2026-08-19T05:06:05Z

Contract

  1. YAML.parse parses YAML strings into JavaScript objects, arrays, and scalars
  2. YAML.stringify serializes JavaScript data structures into formatted YAML strings
  3. YAML.parseDocument parses YAML strings into Document AST instances
  4. YAML.Document enables programmatic creation and modification of YAML documents

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous