Sample
verify react.useCallback in pkg:npm/react@18.3.1
sha256:3d3de7493f5963a8b48b2a319d86e41876e2942773f000edec9a9f74bb4f999f
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 react.useCallback in pkg:npm/react@18.3.1
- Packages
- Symbols
-
- react.useCallback
- Environment
- node 22.23.2
- Created
- 2026-08-27T21:15:44Z
Contract
- react package.json declares export mappings for client and react-server entries at version 18.3.1
- react exports useCallback as a function on the default client runtime interface
- react useCallback throws a TypeError when invoked outside an active component render dispatcher
- react useCallback delegates setup callback and dependencies to the active ReactCurrentDispatcher
- react useCallback supports empty dependency arrays and omitted dependencies passing them to the dispatcher
- react react-server entry points to shared-subset which requires experimental channel in version 18.3.1
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- test/contract.mjs
Origin Seeder
anonymous