CodeSampleX

Sample

verify pkg:golang/github.com/google/uuid@v1.3.0

sha256:8071c99b7a0050b654cbc698004c028a42bcca9d468a71ffca82d115cb815420

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
3
Verification level
L4_CROSS_PASS
Declared environment linux 24 · ubuntu · glibc 2.39 x64 go

Verification-run environments

Environment Contract Stages Run
go 1.26 · linux alpine/x64 · docker ed25519:2a6aa94bf40f1df0 SKIPPED compile:SKIPPED · contract:SKIPPED · load:SKIPPED · resolve:FAIL
CONTAINER_RUN · golang@1		 2026-08-20
go 1.26 · linux alpine/x64 · docker ed25519:c1973797be207ac4 SKIPPED compile:SKIPPED · contract:SKIPPED · load:SKIPPED · resolve:FAIL
CONTAINER_RUN · golang@1		 2026-08-20
go 1.26 · linux alpine/x64 · docker ed25519:d91480838ac982c9 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · golang@1		 2026-08-20

Case

HOW
Goal
verify pkg:golang/github.com/google/uuid@v1.3.0
Packages
Symbols
  • NewRandom
  • New
  • Parse
  • NewSHA1
  • NewMD5
Created
2026-08-20T00:25:20Z

Contract

  1. uuid.NewRandom generates RFC 4122 compliant version 4 UUID with correct variant and version
  2. uuid.Parse parses standard string representations and validates UUID bytes
  3. uuid.NewSHA1 generates deterministic version 5 UUID from namespace and data
  4. uuid.NewMD5 generates deterministic version 3 UUID from namespace and data
  5. uuid.NewString produces valid formatted 36-character hyphenated UUID strings

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