CodeSampleX

Sample

verify github.com/google/uuid.SetNodeID and github.com/google/uuid.SetClockSequence in pkg:golang/github.com/google/uuid@v1.6.0

sha256:77a3ce4e21583a2a7864632a50f1234f6d76122405a14fac84a87d54490b8a2f

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 github.com/google/uuid.SetNodeID and github.com/google/uuid.SetClockSequence in pkg:golang/github.com/google/uuid@v1.6.0
Packages
Symbols
  • github.com/google/uuid.ClockSequence
  • github.com/google/uuid.NodeID
  • github.com/google/uuid.SetClockSequence
  • github.com/google/uuid.SetNodeID
Created
2026-08-18T23:53:27Z

Contract

  1. uuid.SetNodeID configures 6-byte node ID and returns true for valid slice
  2. uuid.SetNodeID rejects slices with length less than 6 and returns false
  3. uuid.NodeID returns copy of currently configured 6-byte node ID
  4. uuid.SetClockSequence sets lower 14-bit clock sequence
  5. uuid.ClockSequence returns current clock sequence in range [0, 16383]
  6. uuid.SetClockSequence with -1 resets and generates new random clock sequence
  7. uuid.NewUUID generates Version 1 UUID matching configured NodeID and ClockSequence

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