CodeSampleX

Sample

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

sha256:7d588117181e64cc9eb174424cb406f3c293a1ad079269a5e48049056ef0c22d

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
2026-08-19T10:42:15Z

Contract

  1. uuid.New returns a non-nil Version 4 UUID with RFC4122 variant
  2. uuid.NewString returns a valid 36-character hyphenated UUID string
  3. uuid.Parse parses standard UUID string representations and rejects invalid formats
  4. uuid.FromBytes converts a 16-byte slice to UUID and rejects slices with invalid length
  5. uuid.Validate accepts valid canonical UUID strings and returns error for invalid formats
  6. uuid.MustParse returns parsed UUID for valid input and panics on invalid input
  7. uuid.NewSHA1 generates deterministic RFC 4122 v5 UUIDs from namespace and name
  8. uuid.NewV7 generates a valid RFC 9562 v7 time-ordered UUID
  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