Sample
verify React.useSyncExternalStore in pkg:npm/react@18.2.0
sha256:93852cfa7e6553d0717d354640c446bae9a0e1dac0174dec81a372c6182c0577
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… |
2026-08-27 |
Case
HOW- Goal
- verify React.useSyncExternalStore in pkg:npm/react@18.2.0
- Packages
- Symbols
-
- React.useSyncExternalStore
- Created
- 2026-08-27T10:06:54Z
Contract
- assert React.useSyncExternalStore is exported as a function from react
- assert calling useSyncExternalStore outside React component render throws TypeError
- assert server rendering with getServerSnapshot uses server snapshot without subscribing to external store
- assert server rendering without getServerSnapshot throws error requiring getServerSnapshot for server-rendered content
- assert client mounting subscribes to external store and renders initial snapshot
- assert mutating external store triggers synchronous re-render with updated snapshot
- assert unmounting client component cleans up external store subscription
- assert useStoreSelector extracts slices and avoids re-render when selected slice is unchanged
Files
- NOTES.md
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.mjs
- test/contract.mjs
Origin Seeder
anonymous