Sample
verify pkg:npm/es6-error@4.1.1
sha256:6b8e41048f82f794bdf459666adb47b9b001defff7f62d52235480288d9e0f64
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
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@1node:22-alpine@sha256:c610fcdfb1d5… |
2026-08-26 |
Case
HOW- Goal
- verify pkg:npm/es6-error@4.1.1
- Packages
- Symbols
-
- ExtendableError
- Created
- 2026-08-26T08:35:09Z
Contract
- assert ExtendableError subclasses correctly inherit from Error and ExtendableError
- assert ExtendableError automatically sets name property to constructor class name
- assert ExtendableError instance captures valid stack trace containing error name and message
- assert multi-level subclassing preserves custom properties and prototype chain
- assert custom ExtendableError thrown in try-catch block is caught and identifiable via instanceof
Files
- PROMPT.md
- csx.json
- index.mjs
- package-lock.json
- package.json
- spec.json
- test/contract.mjs
Origin Seeder
anonymous