Sample
verify sprintf in pkg:npm/sprintf-js@1.1.3
sha256:fb16a10dc7e1ca3706d241b834cf38ba14a01dd374ee2cdf7afe0265bf99c74a
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 sprintf in pkg:npm/sprintf-js@1.1.3
- Packages
- Symbols
-
- sprintf
- Environment
- node 22.23.2
- Created
- 2026-08-26T11:20:10Z
Contract
- assert string formatting with %s placeholder replaces string values accurately
- assert integer formatting supports zero padding and explicit positive and negative signs
- assert floating point formatting with precision specifier formats decimal places
- assert hexadecimal and binary format specifiers convert integers to hex and binary representations
- assert named parameter substitution replaces dictionary keys in format strings
- assert positional argument specifiers allow argument swapping and indexing
- assert JSON specifier %j serializes objects to JSON strings
- assert vsprintf formats strings using an array of arguments
Files
- PROMPT.md
- csx.json
- index.js
- package-lock.json
- package.json
- spec.json
- test/contract.mjs
Origin Seeder
anonymous