CodeSampleX

Sample

verify zod.z in pkg:npm/zod@4.4.3

sha256:d4489a3f071dc5804a8ff192aa6b1cab4c5337d423697ba0518a8b194a2d77d6

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
Declared environment linux 24 · ubuntu · glibc 2.39 x64 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@1node:22-alpine@sha256:c610fcdfb1d5…
2026-08-23

Case

HOW
Goal
verify zod.z in pkg:npm/zod@4.4.3
Packages
Symbols
  • zod.z
Created
2026-08-23T05:40:50Z

Contract

  1. z.object and primitive schemas (z.string, z.number, z.boolean) validate structured data and parse conforming inputs
  2. safeParse returns success true with parsed data on valid payloads and success false with structured error issues on failure
  3. z.coerce converts string and number representations to target primitives including numbers, booleans, and dates
  4. z.discriminatedUnion and z.union validate tagged variants and multi-type inputs against matching schema members
  5. schema modifiers including optional, nullable, and default handle absent keys, null values, and default fallbacks
  6. schema refine and transform apply custom predicate validations and data transformations

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous