CodeSampleX

Sample

verify @babel/core.parseSync in pkg:npm/%40babel/core@7.22.5

sha256:8e61004609a23ee8af2886a534afcbc39d7c16f50ca4ec3a6cb1fd2ac8fd003e

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 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@1
2026-08-20

Case

HOW
Goal
verify @babel/core.parseSync in pkg:npm/%40babel/core@7.22.5
Packages
Symbols
  • @babel/core.parseSync
Environment
node 22.23.2
Created
2026-08-20T15:17:47Z

Contract

  1. parseSync parses JavaScript source code into an AST File node with Program body
  2. parseSync parses ES module syntax including export statements when sourceType is module
  3. parseSync returns tokens when parserOpts.tokens is enabled
  4. parseSync throws a SyntaxError when encountering invalid JavaScript syntax
  5. parseSync accepts options with configFile false and babelrc false to isolate execution

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