Sample
verify pkg:npm/is-fullwidth-code-point@3.0.0
sha256:aa6fdf87bad9070deaf4e9e1f1ca023eb2bbee9ffff73b305fe5900cba19f6fd
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
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@1node:22-alpine@sha256:c610fcdfb1d5… |
2026-08-23 |
Case
HOW- Goal
- verify pkg:npm/is-fullwidth-code-point@3.0.0
- Packages
- Created
- 2026-08-23T07:53:13Z
Contract
- isFullwidthCodePoint returns true for CJK unified ideographs and Hangul syllables
- isFullwidthCodePoint returns true for fullwidth ASCII variants and CJK punctuation
- isFullwidthCodePoint returns true for supplementary plane ideographs
- isFullwidthCodePoint returns false for standard ASCII characters and whitespace
- isFullwidthCodePoint returns false for NaN or invalid code points
- checkCodePoint and isCharFullwidth helper functions correctly determine fullwidth status from code points and strings
- calculateStringWidth calculates display width by counting 2 columns for fullwidth characters and 1 column for standard characters
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.mjs
- test/contract.mjs
Origin Seeder
anonymous