CodeSampleX

Sample

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

sha256:e69cd0bb633f860d54157b30a1cbcc747d334396279ac4513da34dd0560ced24

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
2026-08-19T06:31:21Z

Contract

  1. uuid.NewV7 returns a valid RFC 4122 version 7 UUID with nil error
  2. uuid.NewV7 generates monotonically ordered UUIDs across time
  3. uuid.Validate validates canonical UUID string and rejects invalid format
  4. uuid.Parse decodes canonical UUID string into matching 16-byte UUID
  5. uuid.MustParse parses valid UUID string and panics on invalid input
  6. uuid.NullUUID handles valid UUID and null database values

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