CodeSampleX

Sample

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

sha256:9dcdaa546f9f506030b0602dd2c767131636f27dfe96d6fb1f82ed837fa1edf1

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
Created
2026-08-18T23:04:12Z

Contract

  1. uuid.NewString generates a valid RFC 4122 v4 UUID string
  2. uuid.Parse parses a valid UUID string and returns error for invalid string
  3. uuid.Validate validates valid UUID string format and rejects invalid formats
  4. uuid.New generates a non-nil RFC 4122 v4 UUID value
  5. uuid.MustParse returns UUID on valid string and panics on invalid string
  6. uuid.NewRandom generates a version 4 UUID with RFC4122 variant

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