CodeSampleX

Sample

verify pkg:npm/wrappy@1.0.2

sha256:fe88c89d35d48a347a6dcaeb0bb8ca0058a40c22fd24b3d754a9d7a8cc669ea9

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

Operating system
windows 11
Architecture
x64
Package manager
npm

Verification-run environments

node 22 · linux alpine/x64 · docker PASS
Execution context
node 22
Operating system
linux alpine · musl
Architecture
x64
Runtime
node 22
Language
javascript
Package manager
npm
Execution
container · docker

CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-19

Case

HOW
Goal
verify pkg:npm/wrappy@1.0.2
Packages
Symbols
  • wrappy
Created
2026-08-18T18:16:16Z

Contract

  1. wrappy returns a wrapper generator function when passed a wrapper function
  2. wrappy immediately wraps a target callback when passed both wrapper and target
  3. wrappy copies own enumerable properties from wrapper function to generated wrapper
  4. wrappy copies own enumerable properties from target callback to the returned wrapped function
  5. wrappy does not copy properties if returned function is identical to target callback
  6. wrappy preserves receiver and arguments forwarding to wrapper function
  7. wrappy throws TypeError with need wrapper function when first argument is not a function
  8. wrapFunction helper provides wrapper generator and immediate wrapping interfaces

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

Verification receipts

  • node 22 · linux alpine/x64 · docker PASS
    CONTAINER_RUN compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS node-typescript@1
    ed25519:2175b912ea1c23b1