CodeSampleX

Sample

verify pkg:golang/gopkg.in/yaml.v2@v2.4.0

sha256:6d52f96c1766bf49344055ae29cc57562c75148ec83bab66bd9c0f3991266f97

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…		 2026-08-28

Case

HOW
Goal
verify pkg:golang/gopkg.in/yaml.v2@v2.4.0
Packages
Symbols
  • yaml.Marshal
  • yaml.Unmarshal
Created
2026-08-28T03:17:03Z

Contract

  1. yaml.Unmarshal unmarshals valid YAML bytes into a struct with yaml struct tags
  2. yaml.Marshal serializes a Go struct into valid YAML bytes
  3. yaml.Unmarshal unmarshals nested maps and slices into typed struct fields
  4. yaml.Unmarshal returns an error when parsing malformed YAML syntax
  5. yaml.Marshal respects omitempty tag by omitting zero-value fields

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