CodeSampleX

Sample

generate and parse UUID v4

sha256:f00a58361aa0032dfd0fe3ea3ab73ad88fc0a1b85ea967e6487a6e67be910ffd

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
generate and parse UUID v4
Packages
Symbols
  • uuid.NewString
Created
2026-08-18T22:26:29Z

Contract

  1. uuid.NewString generates a valid RFC 4122 v4 UUID string
  2. uuid.Parse parses a valid canonical UUID string into a UUID value
  3. uuid.Parse returns an error for invalid UUID strings
  4. uuid.New returns a UUID value with version 4 and variant RFC4122
  5. uuid.MustParse parses valid UUID string and panics on invalid input

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