Sample
verify pkg:npm/once@1.4.0
sha256:be0df3e2b3648193208ebac47f114041841f32e3644e5a6b6df9695a1fec07f9
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
windows 11 x64 npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-19 |
Case
HOW- Goal
- verify pkg:npm/once@1.4.0
- Packages
- Symbols
-
- once
- once.strict
- Created
- 2026-08-18T18:18:38Z
Contract
- once wraps a function to execute only once and returns the cached return value on subsequent calls
- once passes arguments and preserves context (this) on the first execution
- once exposes called boolean flag and value result property on the wrapped function
- once.strict executes a named function once and throws an error with the function name on subsequent calls
- once.strict executes an anonymous function once and throws an error on subsequent calls
Files
- PROMPT.md
- csx.json
- index.js
- package-lock.json
- package.json
- spec.json
- test/contract.js
Origin Seeder
anonymous