CodeSampleX

Sample

verify pkg:npm/proxy-from-env@2.1.0

sha256:b1cf59cdb08c2c224a026b14beff33b1cbb7ee65c6941206ba6fba4fe5059ba3

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 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

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…		 2026-08-27

Case

HOW
Goal
verify pkg:npm/proxy-from-env@2.1.0
Packages
Environment
node 22.23.2
Created
2026-08-27T13:03:18Z

Contract

  1. getProxyForUrl returns an empty string when no proxy environment variables are set
  2. getProxyForUrl returns the HTTP_PROXY URL for an HTTP request URL
  3. getProxyForUrl returns the HTTPS_PROXY URL for an HTTPS request URL
  4. getProxyForUrl returns ALL_PROXY URL when specific protocol proxy is not set
  5. getProxyForUrl returns an empty string when NO_PROXY wildcard is set or host matches NO_PROXY
  6. getProxyForUrl respects port-specific NO_PROXY filtering
  7. getProxyForUrl prepends the request protocol scheme when the proxy environment variable lacks a URL scheme
  8. getProxyForUrl returns an empty string when given an invalid URL or string without a valid hostname
  9. getProxyForUrl accepts URL instance as input

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous