CodeSampleX

Sample

verify pkg:npm/istanbul-lib-coverage@3.2.2

sha256:5558e3f0db359f0afe3a02a67ad16cb4f4bc0ae5af97ea36473f7bc72a5d6346

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…
2026-08-27

Case

HOW
Goal
verify pkg:npm/istanbul-lib-coverage@3.2.2
Packages
Symbols
  • createCoverageMap
  • createFileCoverage
  • createCoverageSummary
Environment
node 22.23.2
Created
2026-08-27T12:23:10Z

Contract

  1. createCoverageMap creates an empty coverage map or initializes from raw coverage data
  2. addFileCoverage registers FileCoverage instances and tracks mapped files
  3. CoverageMap.filter modifies coverage map in-place retaining files matching filter predicate
  4. createFileCoverage calculates line coverage, uncovered lines, and branch coverage metrics
  5. FileCoverage.merge merges statement, function, and branch hits from another coverage record
  6. FileCoverage.resetHits resets all execution hit counts to zero
  7. createCoverageSummary calculates line, statement, function, and branch percentages
  8. CoverageSummary.merge aggregates metrics across summaries and updates totals and percentages
  9. CoverageMap.merge combines coverage data across multiple coverage maps

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