Sample
verify emitter.on in pkg:npm/mitt@3.0.1
sha256:22ada314791fee033e8748527c57560a5d4091fa2c6e1918f53622c16e2696f2
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.on in pkg:npm/mitt@3.0.1
- Packages
- Symbols
-
- emitter.on
- Environment
- node 22.23.2
- Created
- 2026-08-26T01:02:59Z
Contract
- emitter.on registers a callback for a specific event type and invokes it with the payload when emitted
- emitter.on preserves listener registration order when multiple handlers are registered for the same event
- emitter.on supports registering wildcard listeners with asterisk to receive all event types and payloads
- emitter.on supports symbol event types for private or unique event channels
- emitter.on registers duplicate handler references so each registration is invoked on emit
- emitter.on registered handlers can be removed using emitter.off
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.js
- test/contract.mjs
Origin Seeder
anonymous