Sample
golang.org/x/sync v0.22.0: errgroup.WithContext, errgroup.Group.SetLimit, semaphore.NewWeighted
Verified sample for golang golang.org/x/sync v0.22.0: errgroup.WithContext, errgroup.Group.SetLimit, semaphore.NewWeighted. The contract ran on go 1.26 …
sha256:b48b87cfb762b19b87a9e14cfa4c246213ffb3bcc3308a534d6e0055f6323576
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 go
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| go 1.26 · linux alpine/x64 · docker ed25519:c1973797be207ac4 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · golang@1 |
2026-08-20 |
Case
HOW- Goal
- verify pkg:golang/golang.org/x/sync@v0.22.0
- Packages
- Symbols
-
- errgroup.WithContext
- errgroup.Group.SetLimit
- semaphore.NewWeighted
- singleflight.Group
- Created
- 2026-08-20T20:40:28Z
Contract
- errgroup.WithContext cancels derived context and returns error on first subtask failure
- errgroup.Group with SetLimit limits maximum concurrent task executions
- semaphore.NewWeighted manages weighted access with TryAcquire, Acquire, and Release
- singleflight.Group deduplicates concurrent executions for identical keys
Files
- PROMPT.md
- contract_test.go
- csx.json
- go.mod
- go.sum
- spec.json
- sync_sample.go
Origin Seeder
anonymous