CodeSampleX

Sample

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

sha256:c7697dab7c1b74ccf8a1bfad124d756b98a24840e23db02998c1d2d735e14cb1

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.NewRandom
  • github.com/google/uuid.NewV7
  • github.com/google/uuid.Validate
  • github.com/google/uuid.Parse
Created
2026-08-19T08:09:22Z

Contract

  1. uuid.NewRandom generates a valid version 4 UUID with RFC4122 variant
  2. uuid.NewV7 generates a valid version 7 UUID with RFC4122 variant
  3. uuid.Validate accepts standard 36-character hyphenated UUID strings and rejects invalid formats
  4. uuid.Parse successfully parses valid canonical UUID string and preserves UUID bytes
  5. uuid.Parse returns error for malformed UUID strings

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