CodeSampleX

Sample

verify lumberjack.Logger.Write in pkg:golang/gopkg.in/natefinch/lumberjack.v2@v2.2.1

sha256:c7ce99b19fb143fe71c4c553b808103b52753ad5b5de1898225717601089db78

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 lumberjack.Logger.Write in pkg:golang/gopkg.in/natefinch/lumberjack.v2@v2.2.1
Packages
Symbols
  • lumberjack.Logger.Write
Created
2026-08-26T01:25:37Z

Contract

  1. lumberjack.Logger implements io.WriteCloser
  2. lumberjack.Logger.Write writes log content to the active log file
  3. lumberjack.Logger.Write appends subsequent writes to the log file
  4. lumberjack.Logger.Close closes the active log file

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous