CodeSampleX

Sample

github.com/pkg/errors v0.9.1

Verified sample for golang github.com/pkg/errors v0.9.1. The contract ran on go 1.26 · linux alpine/x64 · docker and passed: errors.New and errors.Errorf…

sha256:a39c26a5540491f9d0185486359a8aed5b110086a3fff4d6a543782546a51896

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@1		 2026-08-21

Case

HOW
Goal
verify pkg:golang/github.com/pkg/errors@v0.9.1
Packages
Created
2026-08-21T00:22:02Z

Contract

  1. errors.New and errors.Errorf create errors with stack trace capture and formatted messages
  2. errors.Wrap and errors.Wrapf annotate an error with context message and stack trace, returning nil for a nil error
  3. errors.WithMessage and errors.WithMessagef add context message without altering the cause, returning nil for a nil error
  4. errors.WithStack attaches stack trace information to an existing error without altering its message
  5. errors.Cause recursively unwraps nested wrapped errors to retrieve the root underlying cause
  6. Formatting wrapped errors with %+v outputs the full multi-frame stack trace

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