CodeSampleX

Sample

verify pkg:npm/natural-compare@1.4.0

sha256:d12664cfaec501fbb2a0c93f1e2bfbdaf99e565cfb9b86e8167c0f1b1d2be386

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/natural-compare@1.4.0
Packages
Environment
node 22.23.2
Created
2026-08-20T18:43:23Z

Contract

  1. naturalCompare returns 0 for identical strings and empty strings
  2. naturalCompare sorts multi-digit numbers embedded in strings in natural numerical order
  3. naturalCompare orders alphabetical strings in ascending lexicographical order
  4. naturalCompare places uppercase characters before lowercase characters in default sorting order
  5. naturalCompare works as a comparator with Array.prototype.sort to naturally order string lists
  6. naturalCompare coerces non-string arguments to strings before performing comparison
  7. naturalCompare supports custom character precedence configured on String.alphabet

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous