Sample
verify github.com/google/uuid.NullUUID in pkg:golang/github.com/google/uuid@v1.6.0
sha256:1e8deb7703dde7ec0354ec1fc6a1958a45401da1387622f7cb331b6183e1cf10
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
windows 11 x64 go
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 github.com/google/uuid.NullUUID in pkg:golang/github.com/google/uuid@v1.6.0
- Packages
- Symbols
-
- github.com/google/uuid.NullUUID
- Created
- 2026-08-18T20:49:11Z
Contract
- NullUUID with Valid=false returns nil driver.Value and serializes to JSON null
- NullUUID with Valid=true returns string driver.Value and serializes to JSON string
- NullUUID.Scan successfully scans string, byte slice, and string UUID representations
- NullUUID.Scan sets Valid=false on nil input and returns uuid.Nil
- NullUUID.Scan returns error on invalid UUID string or incompatible type
- NullUUID.UnmarshalJSON unmarshals JSON null as Valid=false and valid UUID string as Valid=true
- NullUUID.UnmarshalBinary and MarshalBinary serialize and deserialize 16-byte UUID binary representations
Files
- PROMPT.md
- csx.json
- go.mod
- go.sum
- main.go
- spec.json
- test/contract.go
Origin Seeder
anonymous