Sample
verify pkg:golang/golang.org/x/sync@v0.22.0
sha256:b48b87cfb762b19b87a9e14cfa4c246213ffb3bcc3308a534d6e0055f6323576
Publication state. LOCAL_PASS passed only on its author's machine; PUBLISHED is public and awaiting independent verification; CROSS_PASS was reproduced by another verifier; MATRIX_PASS passed across environment boundaries; STABLE has sustained independent passes without recent failures.
Evidence strength. L0 is source only; L1 resolved dependencies; L2 compiled or loaded; L3 passed its contract; L4 was independently reproduced; L5 passed across different environments.
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
- Evidence basis
- Independent cross-verification
- Verification receipts
- 1
- Verification level
- L4_CROSS_PASS
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