CodeSampleX

Sample

verify Value.Cast in pkg:npm/%40sinclair/typebox@0.27.8

sha256:5f11a7f6590a0f981dc1fb894e20f3d7719b503dca90f34b593dfcd005e38ae0

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…
2026-08-29

Case

HOW
Goal
verify Value.Cast in pkg:npm/%40sinclair/typebox@0.27.8
Packages
Symbols
  • Value.Cast
Created
2026-08-29T05:40:40Z

Contract

  1. Value.Cast preserves valid primitive, object, and array values that already conform to schema
  2. Value.Cast applies explicit default metadata on invalid or missing properties
  3. Value.Cast substitutes type-level default values when invalid primitive types are encountered without explicit default
  4. Value.Cast reconstructs missing or partially missing object properties while retaining conforming fields
  5. Value.Cast casts each item in an array to match the element schema
  6. Value.Cast falls back to the first union variant when a value does not match any union branch
  7. Value.Cast respects optional fields by keeping undefined when not provided in the input object
  8. Value.Check confirms that cast values satisfy schema validation

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