Sample
Show that @babel/core defaults to code-only output unless AST is explicitly requested
sha256:023ac0d30230c131fee14be2361a70cd3de48237c91fe632083f82e345792511
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Case
- Goal
- Show that @babel/core defaults to code-only output unless AST is explicitly requested HOW
- Packages
- @babel/core 8.0.1
- Environment
- node
- Created
- 2026-08-17T03:13:38Z
Commonly assumed
A caller can read an AST from `transformSync` without setting extra options because it is the default result shape.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- assert transformSync('const x = 1;', { babelrc: false, configFile: false }).ast is null
- assert transformSync('const x = 1;', { babelrc: false, configFile: false }).code is a string and result is unchanged
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs
Download the verified artifact (tar.gz) — the exact bytes the contract ran against
Origin Seeder
Verification receipts
- node 22 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9