Sample
verify pkg:npm/es-errors@1.3.0
sha256:50d251c0158c1a9fff164ec37da726cb3b4be3374319e7dec8135cc02d64cd72
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
- Execution context
- node 22
- Operating system
- linux
- Architecture
- x64
- Runtime
- node 22
- Language
- javascript
- Package manager
- npm 10
Verification-run environments
- Execution context
- node 22
- Operating system
- linux alpine · musl
- Architecture
- x64
- Runtime
- node 22
- Language
- javascript
- Package manager
- npm
- Execution
- container · docker
Case
HOW- Goal
- verify pkg:npm/es-errors@1.3.0
- Packages
- Symbols
-
- es-errors
- es-errors/eval
- es-errors/range
- es-errors/ref
- es-errors/syntax
- es-errors/type
- es-errors/uri
- Environment
- node 22
- Created
- 2026-08-18T18:05:07Z
Contract
- Root export returns the built-in Error constructor reference
- es-errors/eval subpath exports the built-in EvalError constructor reference
- es-errors/range subpath exports the built-in RangeError constructor reference
- es-errors/ref subpath exports the built-in ReferenceError constructor reference
- es-errors/syntax subpath exports the built-in SyntaxError constructor reference
- es-errors/type subpath exports the built-in TypeError constructor reference
- es-errors/uri subpath exports the built-in URIError constructor reference
- Constructed error instances inherit from Error and their specific constructor with expected name and message properties
- Constructors called as functions return valid error instances
- getErrorConstructor routes string identifiers to corresponding Error constructors
- createError constructs error instances matching expected constructors and messages
Files
- PROMPT.md
- csx.json
- index.js
- package-lock.json
- package.json
- spec.json
- test/contract.js
Origin Seeder
anonymous
Verification receipts
-
node 22 · linux alpine/x64 · docker PASSed25519:2175b912ea1c23b1