CodeSampleX

Sample

verify emitter.emit in pkg:npm/mitt@3.0.1

sha256:11c9b0aad5ee70cc3759453b32bfe7659c35ce0b4cf38ca5dba7f5d56ff23636

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
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@1node:22-alpine@sha256:c610fcdfb1d5…
2026-08-26

Case

HOW
Goal
verify emitter.emit in pkg:npm/mitt@3.0.1
Packages
Symbols
  • emitter.emit
Environment
node 22.23.2
Created
2026-08-26T01:00:49Z

Contract

  1. emitter.emit invokes registered event handlers synchronously with the provided payload.
  2. emitter.emit invokes wildcard handlers registered with '*' passing the event type and payload.
  3. emitter.emit executes safely as a no-op when no handlers are registered for the event type.
  4. emitter.emit passes undefined to handlers when called without a payload argument.
  5. emitter.emit invokes multiple handlers for the same event in registration order.

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous