CodeSampleX

Sample

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

sha256:bcf644e6f92821f2af268394721fa2034a7df527c804fabf9ab57aaa0afda66a

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.Validate
  • github.com/google/uuid.IsInvalidLengthError
Created
2026-08-19T00:19:25Z

Contract

  1. uuid.Validate accepts standard 36-character hyphenated UUID strings
  2. uuid.Validate accepts 32-character hexadecimal UUID strings without hyphens
  3. uuid.Validate accepts 45-character URN-prefixed UUID strings
  4. uuid.Validate accepts 38-character braced UUID strings
  5. uuid.Validate returns an error for invalid UUID strings
  6. uuid.IsInvalidLengthError returns true for length-mismatch errors from Validate and Parse
  7. uuid.IsInvalidLengthError returns false for invalid-character errors with valid length
  8. uuid.IsInvalidLengthError returns false for nil error

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