CodeSampleX

Sample

generate deterministic UUIDs using predefined RFC 4122 namespaces

sha256:cf37ec506603e2bed0e196ae3ba26bcadeead28765d145d16ca2c8db00937492

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
generate deterministic UUIDs using predefined RFC 4122 namespaces
Packages
Symbols
  • github.com/google/uuid.NameSpaceDNS
  • github.com/google/uuid.NameSpaceOID
  • github.com/google/uuid.NameSpaceURL
  • github.com/google/uuid.NameSpaceX500
Created
2026-08-19T09:18:35Z

Contract

  1. uuid.NameSpaceDNS matches RFC 4122 DNS namespace UUID (6ba7b810-9dad-11d1-80b4-00c04fd430c8)
  2. uuid.NameSpaceURL matches RFC 4122 URL namespace UUID (6ba7b811-9dad-11d1-80b4-00c04fd430c8)
  3. uuid.NameSpaceOID matches RFC 4122 OID namespace UUID (6ba7b812-9dad-11d1-80b4-00c04fd430c8)
  4. uuid.NameSpaceX500 matches RFC 4122 X500 namespace UUID (6ba7b814-9dad-11d1-80b4-00c04fd430c8)
  5. uuid.NewSHA1 and uuid.NewMD5 generate deterministic version 5 and version 3 UUIDs for predefined namespaces
  6. distinct predefined namespaces produce distinct deterministic UUIDs for identical data input

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous