Sample
generate RFC 4122 Version 4 UUIDs from custom io.Reader entropy sources with github.com/google/uuid.NewRandomFromReader
sha256:8186acc2b158c23736fc7a7275711bbf803251d0afa27c31a80e63e9c769f3a4
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 RFC 4122 Version 4 UUIDs from custom io.Reader entropy sources with github.com/google/uuid.NewRandomFromReader
- Packages
- Symbols
-
- github.com/google/uuid.NewRandomFromReader
- Created
- 2026-08-19T10:12:43Z
Contract
- assert uuid.NewRandomFromReader generates RFC 4122 Version 4 UUID from 16-byte io.Reader stream
- assert uuid.NewRandomFromReader produces identical UUIDs when reading identical byte sequences from deterministic readers
- assert uuid.NewRandomFromReader generates valid Version 4 UUID from crypto/rand.Reader
- assert uuid.NewRandomFromReader returns error and Nil UUID when reader is short or returns unexpected EOF
- assert uuid.NewRandomFromReader propagates errors from failing io.Reader implementations
Files
- PROMPT.md
- csx.json
- go.mod
- go.sum
- spec.json
- test/contract.go
Origin Seeder
anonymous