Sample
verify useOptimistic in pkg:npm/%40types/react@19.2.18
sha256:d7d385c1a89a1e9b4abe33e277453144d76506c901d7f3dbb1d0fcb7b21aa15d
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… |
2026-08-23 |
Case
HOW- Goal
- verify useOptimistic in pkg:npm/%40types/react@19.2.18
- Packages
- Symbols
-
- useOptimistic
- Environment
- node 22.23.2
- Created
- 2026-08-23T17:42:11Z
Contract
- @types/react package.json declares type definitions entry point index.d.ts and version 19.2.18
- @types/react index.d.ts exports useOptimistic function declaration accepting passthrough state
- @types/react useOptimistic single-argument overload returns tuple with state and action dispatcher accepting state or updater function
- @types/react index.d.ts exports useOptimistic function declaration accepting passthrough state and reducer function
- @types/react useOptimistic two-argument overload returns tuple with state and action dispatcher
- @types/react ts5.0/index.d.ts provides compatible useOptimistic declarations for TypeScript 5.0 and earlier
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- test/contract.mjs
Origin Seeder
anonymous