CodeSampleX

Sample

verify pkg:npm/range-parser@1.3.0

sha256:9c2b35d0b230f67252f5da82f536bf8f472e2b46a0c7f0b5d41f69701e26b7e2

Publication state. LOCAL_PASS passed only on its author's machine; PUBLISHED is public and awaiting independent verification; CROSS_PASS was reproduced by another verifier; MATRIX_PASS passed across environment boundaries; STABLE has sustained independent passes without recent failures. Evidence strength. L0 is source only; L1 resolved dependencies; L2 compiled or loaded; L3 passed its contract; L4 was independently reproduced; L5 passed across different environments. MIT-0

Execution evidence

Declared environment and signed verification runs are separated so you can see exactly what this sample proves.

Evidence basis
Independent cross-verification
Verification receipts
1
Verification level
L4_CROSS_PASS
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/range-parser@1.3.0
Packages
Created
2026-08-20T13:59:10Z

Contract

  1. parseRange(size, str) parses single byte range and sets type property to 'bytes'
  2. parseRange(size, str) parses multiple non-overlapping ranges
  3. parseRange(size, str) parses suffix range relative to total size
  4. parseRange(size, str) parses open-ended range to end of size
  5. parseRange(size, str) caps range ending at total size minus one
  6. parseRange(size, str, { combine: true }) combines overlapping and adjacent ranges
  7. parseRange(size, str) returns -1 for unsatisfiable ranges
  8. parseRange(size, str) returns -2 for invalid or malformed range strings

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous