CodeSampleX

Sample

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

sha256:3f6268321d90744310df1be03a5fb000542b1e407f54dc1f7a2cf93e106f3e8a

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
  • github.com/google/uuid.New
  • github.com/google/uuid.NewString
  • github.com/google/uuid.Parse
  • github.com/google/uuid.Validate
  • github.com/google/uuid.MustParse
  • github.com/google/uuid.NewRandom
  • github.com/google/uuid.NewV7
  • github.com/google/uuid.NewSHA1
  • github.com/google/uuid.FromBytes
  • github.com/google/uuid.NullUUID
Created
2026-08-19T05:00:40Z

Contract

  1. uuid.New generates a non-nil 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.NewRandom generates a cryptographically secure v4 UUID
  7. uuid.NewV7 creates a time-ordered v7 UUID with RFC4122 variant
  8. uuid.NewSHA1 generates deterministic v5 UUIDs from namespace and name
  9. uuid.FromBytes parses a 16-byte slice and rejects incorrect lengths
  10. uuid.NullUUID supports valid and null values with JSON marshaling

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