CodeSampleX

Sample

verify pkg:golang/github.com/google/uuid@v1.6.0

sha256:d79810e703f3875abfb891191aa361a146d9ee3ce71e48c7c06d15f8f301b78e

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 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 pkg:golang/github.com/google/uuid@v1.6.0
Packages
Created
2026-08-19T08:53:52Z

Contract

  1. uuid.NewRandom generates a valid RFC 4122 v4 UUID with Version 4 and Variant RFC4122
  2. uuid.NewString generates a valid 36-character RFC 4122 v4 UUID string
  3. uuid.NewV7 generates a valid RFC 9562 v7 UUID with Version 7 and Variant RFC4122
  4. uuid.NewSHA1 generates deterministic RFC 4122 v5 UUIDs from namespace and name
  5. uuid.Parse and uuid.Validate parse and validate canonical UUID strings and reject invalid input
  6. uuid.MustParse parses valid UUID strings and panics on invalid input
  7. uuid.FromBytes parses a 16-byte slice into a UUID value and returns error on invalid length
  8. uuid.NullUUID handles valid and null states with SQL driver and JSON serialization

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