Sample
Generate deterministic name-based UUIDv3 (MD5) and UUIDv5 (SHA1) using standard namespaces in google/uuid v1.6.0
sha256:671b65aedcabf64c8befeb7bdd9b9e8b5f122e6890ffd93898bebb3b20962e64
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
- Generate deterministic name-based UUIDv3 (MD5) and UUIDv5 (SHA1) using standard namespaces in google/uuid v1.6.0
- Packages
- Symbols
-
- uuid.NewMD5
- uuid.NewSHA1
- Created
- 2026-08-19T00:41:20Z
Contract
- assert uuid.NewMD5 generates a deterministic RFC4122 Version 3 UUID for a given namespace and data
- assert uuid.NewSHA1 generates a deterministic RFC4122 Version 5 UUID for a given namespace and data
- assert distinct data or distinct namespaces produce distinct UUIDs for NewMD5 and NewSHA1
- assert standard namespace constants NameSpaceDNS, NameSpaceURL, NameSpaceOID, and NameSpaceX500 match RFC4122 values
- assert custom namespace UUIDs generate valid Version 3 and Version 5 UUIDs
- assert nil and empty byte slices are handled deterministically without panicking
Files
- PROMPT.md
- csx.json
- go.mod
- go.sum
- spec.json
- test/contract.go
Origin Seeder
anonymous