CodeSampleX

Sample

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

sha256:a4f6bfc0fdc8306180296d635d69ca0a1f8ca8e1724e0de3e673c121d6f0e5a3

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 go 1.26 windows 11 x64 go 1.26 go go 1

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
Environment
go 1.26.5
Created
2026-08-19T06:20:10Z

Contract

  1. uuid.NewRandom generates a valid version 4 UUID with RFC4122 variant
  2. uuid.NewString returns a valid 36-character canonical UUID string
  3. uuid.Parse successfully parses canonical UUID string into UUID
  4. uuid.Parse returns error on invalid UUID string
  5. uuid.MustParse parses valid UUID string and panics on invalid input
  6. uuid.NewV7 generates a valid version 7 UUID with RFC4122 variant
  7. uuid.NewSHA1 generates deterministic version 5 UUID from namespace and data
  8. uuid.NullUUID handles database SQL value scan 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