Sample
verify vsprintf in pkg:npm/sprintf-js@1.1.3
sha256:f5a4143a9b2da1b21d060a0fa2ba47e48b95b3926bb61d0f9e59890f9c0268dd
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… |
2026-08-26 |
Case
HOW- Goal
- verify vsprintf in pkg:npm/sprintf-js@1.1.3
- Packages
- Symbols
-
- vsprintf
- Created
- 2026-08-26T11:20:30Z
Contract
- vsprintf formats strings by interpolating an array of positional values into placeholder specifiers
- vsprintf formats numbers with specified width, zero padding, sign, and decimal precision
- vsprintf supports alternative base conversions including hexadecimal, binary, and octal
- vsprintf supports explicit argument indexing to rearrange argument order
- vsprintf formats named object properties passed within an array argument
- vsprintf serializes complex JavaScript objects to JSON with the %j specifier
- vsprintf pads strings with custom fill characters and left or right alignment
- vsprintf throws an error when format strings contain syntax errors or missing required arguments
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.mjs
- test/contract.mjs
Origin Seeder
anonymous