CodeSampleX

Sample

Generate deterministic RFC4122 version 3 (MD5) and version 5 (SHA-1) name-based UUIDs with standard namespaces

sha256:417423770ee57bc2c7e1bc56f06d747791b1ad1be701d11abb3af2795eb671ac

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 RFC4122 version 3 (MD5) and version 5 (SHA-1) name-based UUIDs with standard namespaces
Packages
Symbols
  • uuid.NewMD5
  • uuid.NewSHA1
Created
2026-08-18T21:56:21Z

Contract

  1. assert uuid.NewMD5 generates deterministic RFC4122 version 3 UUIDs for standard namespaces
  2. assert uuid.NewSHA1 generates deterministic RFC4122 version 5 UUIDs for standard namespaces
  3. assert distinct namespaces produce different UUIDs for identical input data
  4. assert distinct input data produces different UUIDs within the same namespace
  5. assert MD5 (v3) and SHA1 (v5) produce distinct UUIDs for identical namespace and input data
  6. assert NewMD5 and NewSHA1 with custom namespace UUIDs produce valid Version 3 and Version 5 RFC4122 UUIDs

Files

  • PROMPT.md
  • csx.json
  • go.mod
  • go.sum
  • spec.json
  • test/contract.go

Download the source artifact (tar.gz)

Origin Seeder

anonymous