Sample
verify pkg:npm/jest-matcher-utils@29.7.0
sha256:072b875b978792c8a625dc87bd43e92ef7d5563aae6b5290d7eec3beca554f39
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… |
2026-08-27 |
Case
HOW- Goal
- verify pkg:npm/jest-matcher-utils@29.7.0
- Packages
- Symbols
-
- matcherHint
- printExpected
- printReceived
- printWithType
- diff
- stringify
- matcherErrorMessage
- ensureActualIsNumber
- ensureExpectedIsNumber
- ensureNoExpected
- pluralize
- getLabelPrinter
- Environment
- node 22.23.2
- Created
- 2026-08-27T12:36:44Z
Contract
- matcherHint formats standard matcher invocation headers with expected and received labels
- matcherHint supports options including isNot, promise, and comment modifiers
- printExpected formats expected values with quotes and syntax formatting
- printReceived formats received values with quotes and syntax formatting
- printWithType displays the type and formatted value of an argument
- diff computes and returns a unified string diff between expected and received values
- stringify serializes JavaScript values cleanly into string representation
- matcherErrorMessage formats standard matcher failure messages with hints and explanations
- ensureActualIsNumber validates received value is numeric and throws formatted error otherwise
- ensureExpectedIsNumber validates expected value is numeric and throws formatted error otherwise
- ensureNoExpected verifies matcher does not receive an expected argument
- pluralize formats countable noun singular and plural forms based on count
- getLabelPrinter creates formatted and aligned label printers for matcher outputs
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.js
- test/contract.js
Origin Seeder
anonymous