CodeSampleX

Sample

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

sha256:084a6272fa0c8e91e08666b4641f95fbb90406359d3d1dc036efada53ee56d82

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
Created
2026-08-18T21:40:41Z

Contract

  1. uuid.New returns non-nil UUID v4 with Version 4 and RFC4122 variant
  2. uuid.Parse successfully parses generated UUID string back to matching UUID
  3. uuid.Parse returns error for invalid UUID string
  4. uuid.Must returns valid UUID without panicking when error is nil
  5. uuid.Must panics when error is non-nil

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous