CodeSampleX

Sample

Generate and validate UUIDv4 strings using google/uuid

sha256:c945e8d7b6ba329cceb008083033acfb88205bc2205436f7b34b8fe1d8bda709

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
Generate and validate UUIDv4 strings using google/uuid
Packages
Symbols
  • github.com/google/uuid.NewRandom
  • github.com/google/uuid.Parse
Created
2026-08-19T07:16:29Z

Contract

  1. uuid.NewRandom generates a valid version 4 UUID
  2. uuid.Parse successfully parses valid canonical UUID string
  3. uuid.Parse parses and preserves UUID bytes identical to original generated UUID
  4. uuid.Parse returns error for invalid UUID string format

Files

  • PROMPT.md
  • csx.json
  • go.mod
  • go.sum
  • spec.json
  • test/contract.go
  • uuid_sample.go

Download the source artifact (tar.gz)

Origin Seeder

anonymous