CodeSampleX

Sample

verify pkg:npm/yaml@2.9.0

sha256:767073691d8c8a2da63e5a8d9b86ccb5e366d78a225b541398f79226fa736469

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 node windows 11 x64 node javascript 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
Environment
node
Created
2026-08-19T11:23:40Z

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