CodeSampleX

Sample

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

sha256:5e4e90421b81813b84b5bec59029995ee0e01d6feb1da72b22c832e8dab0c332

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.EnableRandPool
  • github.com/google/uuid.DisableRandPool
Created
2026-08-19T01:43:41Z

Contract

  1. uuid.EnableRandPool enables the internal randomness pool for Version 4 UUID generation
  2. uuid.New and uuid.NewRandom generate valid Version 4 UUIDs with RFC4122 variant when rand pool is enabled
  3. uuid.New generates distinct non-nil UUID values across consecutive calls with rand pool enabled
  4. uuid.DisableRandPool disables the randomness pool and returns to unpooled randomness
  5. uuid.New and uuid.NewRandom continue to generate valid Version 4 UUIDs with RFC4122 variant after rand pool is disabled
  6. UUIDs generated with both enabled and disabled rand pool produce valid 16-byte UUIDs that round-trip with String() and Parse()

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