CodeSampleX

Sample

verify pkg:npm/string_decoder@1.1.1

sha256:6af13ac4f1feade6da94ab07c259511bd3c911b9c8db07fa268970fb70208e72

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…
2026-08-23

Case

HOW
Goal
verify pkg:npm/string_decoder@1.1.1
Packages
Environment
node 22.23.2
Created
2026-08-23T07:31:31Z

Contract

  1. StringDecoder() instantiates with default utf8 encoding and supports custom encodings like latin1, base64, and hex
  2. StringDecoder.prototype.write() buffers incomplete multi-byte UTF-8 sequences across chunk boundaries
  3. StringDecoder.prototype.write() decodes multi-byte UTF-8 sequences including 4-byte emojis when completed
  4. StringDecoder.prototype.write() returns complete ASCII and UTF-8 strings immediately
  5. StringDecoder.prototype.end() flushes trailing incomplete bytes as Unicode replacement characters
  6. StringDecoder.prototype.end(buffer) decodes the final buffer chunk and flushes the decoder
  7. StringDecoder.prototype.write() and end() decode base64 across buffer boundaries
  8. StringDecoder.prototype.write() and end() decode hex across buffer boundaries

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous