CodeSampleX

Sample

configure and inspect clock sequence for version 1 UUIDs with github.com/google/uuid SetClockSequence and ClockSequence

sha256:78df77ac709eee6e6e42554046bc8bf365627651daf85970b73d11a408a0790d

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
configure and inspect clock sequence for version 1 UUIDs with github.com/google/uuid SetClockSequence and ClockSequence
Packages
Symbols
  • UUID.ClockSequence
  • uuid.ClockSequence
  • uuid.SetClockSequence
Environment
go 1.26.5
Created
2026-08-19T07:26:55Z

Contract

  1. uuid.SetClockSequence sets the global clock sequence for UUIDv1 generation
  2. uuid.ClockSequence returns the currently configured global clock sequence
  3. uuid.NewUUID generates a Version 1 UUID containing the configured clock sequence
  4. UUID.ClockSequence extracts the 14-bit clock sequence from a Version 1 UUID
  5. uuid.SetClockSequence masks sequence values to 14 bits
  6. uuid.SetClockSequence with negative value resets clock sequence to random generation

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