CodeSampleX

Sample

verify pkg:npm/sprintf-js@1.1.3

sha256:8c1fc4349e2ef158b9c261fa5b1fc0bfbc5cea194afe7d4918a7405052359fc5

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…		 2026-08-26

Case

HOW
Goal
verify pkg:npm/sprintf-js@1.1.3
Packages
Environment
node 22.23.2
Created
2026-08-26T08:03:58Z

Contract

  1. sprintf formats positional arguments with %s, %d, and %x specifiers
  2. sprintf swaps argument positions using %2$s and %1$s positional syntax
  3. vsprintf formats template strings from an array of arguments
  4. sprintf replaces named and nested placeholders %(user.name)s with values from a dictionary object
  5. sprintf formats numbers with leading zeros and specified width
  6. sprintf formats floating point numbers with specified decimal precision
  7. sprintf formats objects into JSON strings using %j specifier
  8. sprintf throws TypeError when a non-numeric string is provided for a numeric specifier
  9. sprintf throws Error when mixing positional and named placeholders in a single format string

Files

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.js
  • test/contract.js

Download the source artifact (tar.gz)

Origin Seeder

anonymous