CodeSampleX

Sample

github.com/google/uuid v1.6.0: generate deterministic UUIDs using predefined RFC 4122 namespaces

Verified sample for golang github.com/google/uuid v1.6.0: generate deterministic UUIDs using predefined RFC 4122 namespaces. The contract ran on go 1.26 …

sha256:cf37ec506603e2bed0e196ae3ba26bcadeead28765d145d16ca2c8db00937492

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
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

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