CodeSampleX

Sample

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

sha256:70b1ccb99c0511d0fee26432e6c8ad2cc72b5f7148b94bafe9474db309ddaaf9

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
2026-08-19T06:17:29Z

Contract

  1. uuid.NewRandom generates a valid RFC 4122 v4 UUID with Version 4 and Variant RFC4122
  2. uuid.NewString generates a 36-character valid RFC 4122 v4 UUID string
  3. uuid.Parse parses valid UUID strings and returns an error for invalid input
  4. uuid.Validate accepts valid UUID formatting and rejects malformed strings
  5. uuid.MustParse returns UUID on valid strings and panics on invalid input
  6. uuid.NewV7 creates a time-ordered RFC 9562 v7 UUID with Version 7 and Variant RFC4122
  7. uuid.NewSHA1 generates deterministic RFC 4122 v5 UUIDs from namespace and name
  8. uuid.FromBytes parses a 16-byte slice and rejects incorrect lengths
  9. uuid.NullUUID supports database SQL Value and Scan operations 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