CodeSampleX

Sample

verify pkg:npm/ms@2.1.3

sha256:6102191b90ff51b674f02641c23eb8b80f16b61c823d6c56e4d5523754855cb0

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/ms@2.1.3
Packages
Environment
node 22.22.2
Created
2026-08-19T09:56:20Z

Contract

  1. ms parses duration strings with various units (years, weeks, days, hours, minutes, seconds, milliseconds) into milliseconds
  2. ms parses decimal strings, negative strings, and numeric-only strings into milliseconds
  3. ms returns undefined for invalid duration strings or strings exceeding 100 characters
  4. ms formats millisecond numbers into concise short duration strings for positive and negative values
  5. ms formats millisecond numbers into human-readable verbose strings with long option and handles pluralization
  6. ms throws an Error for empty strings, NaN, Infinity, and non-string/non-number inputs

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