CodeSampleX

Sample

parse time strings and format durations with ms

sha256:85e595e4591188c9427953e744c42ec3427f4c671a61322e959d18b0d8ce21c7

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 windows 11 x64 node 22 javascript npm 10

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 time strings and format durations with ms
Packages
Symbols
  • ms
Environment
node 22
Created
2026-08-19T09:24:04Z

Contract

  1. ms parses human-readable duration strings into milliseconds
  2. ms parses negative duration strings into negative milliseconds
  3. ms formats milliseconds into short duration strings
  4. ms formats milliseconds into long duration strings with long option
  5. ms returns undefined for invalid strings and throws for invalid argument types

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous