CodeSampleX

Sample

verify pkg:npm/yaml@2.9.0

sha256:25749ba39d4b1dc6adcedffb3eb320cd522b089eb08432de58825f83d85f4f02

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 22.23 windows 11 x64 node 22.23 javascript npm 10

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
  • parse
  • stringify
  • parseDocument
Environment
node 22.23.2
Created
2026-08-19T03:15:23Z

Contract

  1. parse parses YAML scalars, mappings, and sequences into JavaScript values
  2. stringify serializes JavaScript objects and arrays into YAML formatted strings
  3. parseDocument parses YAML text into a manipulable Document AST supporting get, set, and toJS

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous