CodeSampleX

Sample

verify pkg:npm/proxy-from-env@1.1.0

sha256:20fca09b299083a2fa9781654699a2604afd649c73b5824b987fb97f8fe91d7e

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 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript 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@1
2026-08-20

Case

HOW
Goal
verify pkg:npm/proxy-from-env@1.1.0
Packages
Environment
node 22.23.2
Created
2026-08-20T20:32:58Z

Contract

  1. assert getProxyForUrl returns proxy url matching protocol from environment variables
  2. assert getProxyForUrl prepends protocol scheme if proxy address lacks scheme
  3. assert getProxyForUrl returns empty string when no proxy environment variables are set
  4. assert getProxyForUrl respects NO_PROXY exact domain and wildcard matching
  5. assert getProxyForUrl respects NO_PROXY domain suffix matching with leading dot or asterisk
  6. assert getProxyForUrl respects NO_PROXY specific port filtering
  7. assert getProxyForUrl returns empty string for invalid or missing URL inputs

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous