CodeSampleX

Sample

verify pkg:npm/json-stable-stringify-without-jsonify@1.0.1

sha256:79231fbba062a1015458c3ebbab9132aa8ed9dac2071a570a314da98b7d20c92

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 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm

Verification-run environments

Environment Contract Stages Run
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1
2026-08-20

Case

HOW
Goal
verify pkg:npm/json-stable-stringify-without-jsonify@1.0.1
Packages
Environment
node 22.23.2
Created
2026-08-20T22:00:58Z

Contract

  1. assert stringify produces deterministic JSON string with sorted object keys regardless of key insertion order
  2. assert stringify handles nested objects and arrays deterministically
  3. assert stringify formats output with indentation when space option is provided as a number or string
  4. assert stringify supports custom key comparison function via cmp option or direct function parameter
  5. assert stringify supports replacer function and serializes objects with toJSON methods
  6. assert stringify throws TypeError on circular structures by default and replaces circular references with __cycle__ when cycles option is true
  7. assert stringify correctly serializes primitive values, null, and omits undefined or functions in objects while converting them to null in arrays

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous