Sample
verify pkg:npm/express@5.2.1
sha256:9ab8b3fc8e0562fee4c6b35848021c4df71d8b332ee57bc250caa38421deb44c
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/express@5.2.1
- Packages
- Created
- 2026-08-20T13:48:38Z
Contract
- express() creates an application instance and express.Router() creates modular route handlers
- nested router with mergeParams: true inherits and resolves parent path parameters across route hierarchies
- res.set() configures custom response headers, res.cookie() sets HttpOnly and SameSite cookie options, and res.status().json() delivers formatted JSON responses
- async route handlers returning rejected promises automatically propagate errors to Express error-handling middleware without unhandled rejections
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.js
- test/contract.mjs
Origin Seeder
anonymous