Sample
verify pkg:npm/cookie-signature@1.2.2
sha256:5a9400f0796dc83957921d83e1eea8f6054d4c32a6d9d991342d1fd71dd76b1b
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
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@1 |
2026-08-20 |
Case
HOW- Goal
- verify pkg:npm/cookie-signature@1.2.2
- Packages
- Created
- 2026-08-20T13:43:52Z
Contract
- assert cookieSignature.sign signs cookie string value with HMAC SHA256 base64 digest stripped of padding
- assert cookieSignature.unsign recovers the original cookie value when secret matches
- assert cookieSignature.unsign returns false for tampered payload or mismatched secret
- assert cookieSignature.sign and cookieSignature.unsign throw TypeError when argument types are invalid or secret is null
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- test/contract.mjs
Origin Seeder
anonymous