CodeSampleX

Sample

verify github.com/go-kit/log.With in pkg:golang/github.com/go-kit/log@v0.2.1

sha256:f697dabeedd8c138262ca3732513dedef03402faaf8e1a67a231fb4f70488551

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 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 github.com/go-kit/log.With in pkg:golang/github.com/go-kit/log@v0.2.1
Packages
Symbols
  • github.com/go-kit/log.With
Created
2026-08-26T01:07:31Z

Contract

  1. log.With returns a new Logger preserving context key-value pairs across log calls
  2. log.With does not mutate parent logger when creating child context loggers
  3. log.With supports chaining multiple context layers in sequential order
  4. log.With dynamically evaluates Valuer functions on each log invocation
  5. log.WithPrefix prepends key-value pairs before subsequent contextual and call arguments
  6. log.With works concurrently across goroutines when backed by a synchronized logger

Files

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

Download the source artifact (tar.gz)

Origin Seeder

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