CodeSampleX

Sample

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

sha256:721e13704cae4819ee2da996cddc71ef9679f2f79451fd8de30b595be4812785

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

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
Symbols
  • uuid.New
  • uuid.NewString
  • uuid.Parse
  • uuid.Validate
  • uuid.MustParse
  • uuid.NewRandom
  • uuid.NewSHA1
  • uuid.NullUUID
Created
2026-08-18T23:06:47Z

Contract

  1. uuid.New generates a non-nil RFC 4122 v4 UUID value
  2. uuid.NewString generates a valid RFC 4122 v4 UUID string
  3. uuid.Parse parses a valid UUID string and returns error for invalid string
  4. uuid.Validate validates valid UUID string format and rejects invalid formats
  5. uuid.MustParse returns UUID on valid string and panics on invalid string
  6. uuid.NewRandom generates a version 4 UUID with RFC4122 variant
  7. uuid.NewSHA1 generates deterministic RFC 4122 v5 UUIDs from namespace and data
  8. uuid.NullUUID handles valid and null UUID values with 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