CodeSampleX

Sample

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

sha256:69a6a2b73ff00c0fcb00af92087054006634531a7d4031c31593e0ece7f3f1fb

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.NewRandomFromReader
  • github.com/google/uuid.SetRand
Created
2026-08-18T22:37:30Z

Contract

  1. uuid.NewRandomFromReader reads 16 bytes from reader and returns a Version 4 RFC4122 UUID
  2. uuid.NewRandomFromReader returns an error when the reader fails or returns insufficient bytes
  3. uuid.NewRandomFromReader generates deterministic UUIDs when given identical byte streams
  4. uuid.SetRand replaces the random source used by uuid.NewRandom and uuid.NewString
  5. uuid.SetRand with nil resets the random source to default crypto/rand

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