CodeSampleX

Sample

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

sha256:bf7fa2d6e8d33ed305d35bcd19826fd6c77ebe66987907e632483d275460697e

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 · ubuntu · glibc 2.39 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 xxhash.New in pkg:golang/github.com/cespare/xxhash/v2@v2.1.1
Packages
Symbols
  • xxhash.New
Created
2026-08-26T05:18:31Z

Contract

  1. xxhash.New creates a hash.Hash64 instance that computes 64-bit xxHash checksum via Write and Sum64
  2. Digest.WriteString produces identical hash output to Write without extra byte allocation
  3. Digest.Reset restores initial state allowing reuse for independent checksum calculations
  4. Digest.Sum appends 8-byte big-endian representation of Sum64 to provided byte slice
  5. Digest.MarshalBinary and UnmarshalBinary preserve and restore internal accumulator state across writes

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