CodeSampleX

Sample

github.com/google/uuid v1.6.0: UUID.URN

Verified sample for golang github.com/google/uuid v1.6.0: UUID.URN. The contract ran on go 1.26 · linux alpine/x64 · docker and passed: uuid.UUID.URN returns…

sha256:489dd4e367d8123a9179a700b24534b59930c99a813c97232a1c6604d8c9fceb

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
verify URN formatting and parsing with github.com/google/uuid.UUID.URN in pkg:golang/github.com/google/uuid@v1.6.0
Packages
Symbols
  • github.com/google/uuid.UUID.URN
Created
2026-08-18T23:21:07Z

Contract

  1. uuid.UUID.URN returns RFC 4122 compliant URN formatted string starting with urn:uuid:
  2. uuid.UUID.URN formats uuid.Nil into urn:uuid:00000000-0000-0000-0000-000000000000
  3. uuid.Parse successfully parses standard URN string with urn:uuid: prefix
  4. uuid.ParseBytes parses byte slice containing URN formatted UUID
  5. uuid.UUID.URN and uuid.Parse round-trip accurately preserves UUID value
  6. uuid.Parse rejects invalid URN strings with error

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous