CodeSampleX

Sample

verify pkg:npm/ms@2.1.3

sha256:b9181cd0d78afc73a3b2bd09c5bce1f7761ee7d61215af44d7078a3ea5fa01b7

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 linux 24 · ubuntu · glibc 2.39 x64 npm 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
Created
2026-08-19T09:26:06Z

Contract

  1. assert ms parses duration strings with various units (years, weeks, days, hours, minutes, seconds, milliseconds) into milliseconds
  2. assert ms parses fractional, decimal, and negative duration strings
  3. assert ms parses case-insensitive duration units and supports whitespace between number and unit
  4. assert ms returns undefined for unparseable strings or strings longer than 100 characters
  5. assert ms formats millisecond numbers into short duration strings
  6. assert ms formats millisecond numbers into long duration strings with singular and plural units when { long: true }
  7. assert ms formats negative millisecond numbers into short and long duration strings
  8. assert ms throws an error for empty strings, non-string, non-numeric, and non-finite values

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous