CodeSampleX

Sample

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

sha256:9ab661032b8b93125e1b399bf53f3497d3da5480cff1d7ae197f3b525ed189ee

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 go 1.26 windows 11 x64 go 1.26 go go 1

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 github.com/google/uuid.UUID.Version in pkg:golang/github.com/google/uuid@v1.6.0
Packages
Symbols
  • github.com/google/uuid.UUID.Version
Environment
go 1.26.5
Created
2026-08-19T00:23:14Z

Contract

  1. UUID.Version extracts Version(1) from Version 1 time-based UUIDs
  2. UUID.Version extracts Version(4) from Version 4 randomly generated UUIDs
  3. UUID.Version extracts Version(5) from Version 5 SHA-1 name-based UUIDs
  4. UUID.Version extracts Version(6) and Version(7) from Version 6 and 7 time-ordered UUIDs
  5. UUID.Version extracts the 4-bit version field from the high nibble of octet 6
  6. Version.String returns standard VERSION_N representation for versions 0 through 15 and BAD_VERSION_N for out-of-range values

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