CodeSampleX

Sample

verify pkg:npm/yaml@2.9.0

sha256:259515b1dc2b15bf950cdbb3d20442b193fa79d13d071b9170d357db5402833b

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 22.22 linux 24 · ubuntu · glibc 2.39 x64 node 22.22 javascript npm 11 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.parseAllDocuments
  • yaml.visit
  • yaml.visitAsync
  • yaml.Scalar
  • yaml.Alias
  • yaml.isAlias
  • yaml.isDocument
Environment
node 22.22.2
Created
2026-08-19T12:04:39Z

Contract

  1. assert parseAllDocuments parses multi-document YAML streams into an array of Document ASTs
  2. assert visit traverses and mutates AST scalar nodes or removes items using visit.REMOVE
  3. assert visitAsync asynchronously traverses and mutates YAML AST nodes with Promise-returning visitor methods
  4. assert Scalar creates explicit scalar AST nodes with customized value and formatting types
  5. assert Alias creates reference nodes pointing to anchor targets and isAlias verifies alias node identity
  6. assert isDocument identifies Document instances parsed from stream content

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