CodeSampleX

Sample

parse and stringify YAML documents using parse and stringify

sha256:8b87972e78b715eab6d95e103e6fc621c7c9746ddb1387ae21fa0d47f4ba1fd9

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
parse and stringify YAML documents using parse and stringify
Packages
Symbols
  • parse
  • stringify
Created
2026-08-19T03:49:06Z

Contract

  1. parse parses YAML scalar, sequence, and mapping strings into JavaScript objects and primitives
  2. parse transforms parsed values using a custom reviver function
  3. stringify serializes JavaScript objects, arrays, and primitive values to formatted YAML strings
  4. stringify formats output according to custom options including indent and collection style
  5. parse throws YAMLParseError with line and column position on invalid YAML syntax

Files

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

Download the source artifact (tar.gz)

Origin Seeder

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