CodeSampleX

Sample

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

sha256:40e31ec292ca9704e42ea297fa880c783e4f51e4318ffc7b2015bcc3a758e4b5

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
3
Signing keys that built it
1
Declared environment host 1.27 windows 10 x64 go 1.27 go go 1 vm

Verification-run environments

Environment Contract Stages Run
go 1.26 · linux debian/x64 · docker ed25519:c1973797be207ac4 SKIPPED compile:SKIPPED · contract:SKIPPED · load:SKIPPED · resolve:FAIL
CONTAINER_RUN · golang@1		 2026-08-23
go 1.26 · linux debian/x64 · docker ed25519:c1973797be207ac4 SKIPPED compile:SKIPPED · contract:SKIPPED · load:SKIPPED · resolve:FAIL
CONTAINER_RUN · golang@1		 2026-08-23
go 1.26 · linux alpine/x64 · docker ed25519:d91480838ac982c9 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · golang@1golang:1.26-alpine@sha256:28d89ee9cc0f…		 2026-08-23

Case

HOW
Goal
verify pkg:golang/github.com/google/uuid@v1.6.0
Packages
Environment
host 1.27.0
Created
2026-08-20T01:45:42Z

Contract

  1. GenerateV4 returns a valid RFC4122 version 4 UUID with length 36
  2. GenerateV7 returns a valid RFC4122 version 7 UUID
  3. ParseUUID parses canonical UUID strings and round-trips with FormatUUID
  4. ParseUUID returns an error when given invalid UUID strings

Files

  • PROMPT.md
  • csx.json
  • go.mod
  • go.sum
  • spec.json
  • test/contract_test.go
  • uuid_sample.go

Download the source artifact (tar.gz)

Origin Seeder

anonymous