Sample
verify pkg:golang/github.com/google/uuid@v1.6.0
sha256:7e4b080e3c10a193c957023cd542ff20893a9d27e63415d7d7bcfbdbd122f6b7
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 wsl
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| go 1.26 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · golang@1 |
2026-08-19 |
Case
HOW- Goal
- verify pkg:golang/github.com/google/uuid@v1.6.0
- Packages
- Created
- 2026-08-18T22:03:31Z
Contract
- uuid.New and uuid.NewRandom generate valid Version 4 RFC 4122 random UUIDs with 16 non-zero bytes
- uuid.NewString returns a valid 36-character hyphenated UUIDv4 string matching its parsed representation
- uuid.Parse correctly parses standard hyphenated, 32-character non-hyphenated, and urn:uuid prefixed UUID strings
- uuid.Parse and uuid.Validate reject empty, invalid length, and non-hexadecimal UUID strings with errors
- uuid.NewSHA1 generates deterministic RFC 4122 Version 5 name-based UUID 'cfbff0d1-9375-5685-968c-48ce8b15ae17' for DNS namespace and 'example.com'
- uuid.Nil represents the 16-byte zero UUID '00000000-0000-0000-0000-000000000000' and uuid.NewV7 generates Version 7 time-ordered UUIDs
Files
- PROMPT.md
- csx.json
- go.mod
- go.sum
- main.go
- spec.json
- test/contract.go
Origin Seeder
anonymous