CodeSampleX

Sample

verify pkg:golang/github.com/go-logfmt/logfmt@v0.6.0

sha256:affb4bd7f782aaf547e162386c172bb40d0487f49756f87b8a4a87fb03eb72a8

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…		 2026-08-27

Case

HOW
Goal
verify pkg:golang/github.com/go-logfmt/logfmt@v0.6.0
Packages
Symbols
  • github.com/go-logfmt/logfmt.MarshalKeyvals
  • github.com/go-logfmt/logfmt.NewDecoder
Created
2026-08-27T21:49:51Z

Contract

  1. logfmt.MarshalKeyvals serializes variadic key-value pairs into logfmt format without trailing newline
  2. logfmt.MarshalKeyvals correctly formats and quotes values containing spaces, quotes, and newlines
  3. logfmt.MarshalKeyvals formats types including booleans, errors, time.Time, and fmt.Stringer
  4. logfmt.MarshalKeyvals returns ErrNilKey when a nil key is provided
  5. logfmt.MarshalKeyvals returns ErrInvalidKey when a key contains only invalid runes like spaces or equals
  6. logfmt.MarshalKeyvals handles odd number of arguments by appending null value
  7. Helper functions in sample package perform round-trip encoding and parsing accurately

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