CodeSampleX

Sample

vary 1.1.2

Verified sample for npm vary 1.1.2. The contract ran on node 22 · linux alpine/x64 · docker and passed: vary(res, field) sets the Vary header on response…

sha256:096d8391342654f71e83728e3b26eb9f1d537f215ae90f4372f781e75a2ee6d6

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@1		 2026-08-20

Case

HOW
Goal
verify pkg:npm/vary@1.1.2
Packages
Created
2026-08-20T14:08:03Z

Contract

  1. vary(res, field) sets the Vary header on response object
  2. vary(res, field) appends field to existing Vary header without duplicating
  3. vary(res, field) accepts an array of header field names
  4. vary(res, field) sets Vary header to * when field is *
  5. vary.append(header, field) returns updated header string without modifying existing headers
  6. vary.append(header, field) returns * if header or field contains *
  7. vary.append(header, field) throws TypeError when header or field argument is invalid
  8. vary(res, field) throws TypeError when res argument is invalid or missing methods

Files

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

Download the source artifact (tar.gz)

Origin Seeder

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