CodeSampleX

Sample

verify @babel/helper-validator-identifier.isIdentifierName in pkg:npm/%40babel/helper-validator-identifier@8.0.4

sha256:2ac016bd205ef85ab3aef92c3d9b07c177ddc86ff8ca658104b1a1d6e6aa7fe7

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 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript 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 @babel/helper-validator-identifier.isIdentifierName in pkg:npm/%40babel/helper-validator-identifier@8.0.4
Packages
Symbols
  • @babel/helper-validator-identifier.isIdentifierName
Environment
node 22.23.2
Created
2026-08-20T21:08:30Z

Contract

  1. isIdentifierName returns true for standard ASCII identifiers starting with letters, dollar signs, or underscores followed by alphanumeric characters
  2. isIdentifierName returns true for JavaScript reserved words and keywords since they are valid IdentifierNames
  3. isIdentifierName returns true for Unicode identifiers with valid start and continuation characters
  4. isIdentifierName returns false for empty strings and identifiers starting with digits
  5. isIdentifierName returns false for strings containing spaces, hyphens, dots, or other punctuation and operator characters

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous