CodeSampleX

Sample

verify Sum64 in pkg:golang/github.com/cespare/xxhash/v2@v2.1.1

sha256:a11468f898df2853a7ae7cf22abbf884e995636aa7d27d91fd59f0fdba9abc3d

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
1
Signing keys that built it
1
Declared environment linux 24 x64 go

Verification-run environments

Environment Contract Stages Run
go 1.26 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · golang@1golang:1.26-alpine@sha256:28d89ee9cc0f…
2026-08-26

Case

HOW
Goal
verify Sum64 in pkg:golang/github.com/cespare/xxhash/v2@v2.1.1
Packages
Symbols
  • Sum64
Created
2026-08-26T01:15:39Z

Contract

  1. xxhash.Sum64 computes deterministic 64-bit checksum for byte slices
  2. xxhash.Sum64 produces different hashes for different byte slices
  3. xxhash.Sum64 returns consistent deterministic hash for empty byte slice
  4. xxhash.Sum64 with single byte slice matches expected calculation

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous