CodeSampleX

Sample

verify decode in pkg:npm/%40jridgewell/sourcemap-codec@1.5.5

sha256:b7c8c55ba3c2eebedef0c8fa092f2f637c89d2aab348946c527d38c9243bc2d6

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 decode in pkg:npm/%40jridgewell/sourcemap-codec@1.5.5
Packages
Symbols
  • decode
Environment
node 22.23.2
Created
2026-08-26T05:12:28Z

Contract

  1. decode parses empty mappings string to a single empty line array
  2. decode parses 1-element segment containing generated column offset
  3. decode parses 4-element segment containing generated column, source index, original line, and original column
  4. decode parses 5-element segment containing generated column, source index, original line, original column, and name index
  5. decode parses comma-separated segments within the same line
  6. decode parses semicolon-separated lines and preserves empty lines

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