CodeSampleX

Sample

verify pkg:npm/body-parser@2.3.0

sha256:44d74dc79dc3563070cf3bbdeace6c1dc4ac9a865dfb7e0d68021dcf7dbfe6c7

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 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

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/body-parser@2.3.0
Packages
Environment
node 22.23.2
Created
2026-08-20T13:31:26Z

Contract

  1. bodyParser.json() parses JSON request bodies and populates req.body with parsed object
  2. bodyParser.urlencoded({ extended: false }) parses URL-encoded bodies into key-value pairs
  3. bodyParser.text() parses plain text request bodies into string
  4. bodyParser.raw() parses request bodies into Buffer when matching application/octet-stream
  5. bodyParser.json() invokes next with 400 status error on malformed JSON payload
  6. body-parser middlewares pass through without modifying req.body when Content-Type does not match

Files

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • test/contract.js

Download the source artifact (tar.gz)

Origin Seeder

anonymous