CodeSampleX

Sample

github.com/mitchellh/copystructure v1.2.0: CopierFunc

Verified sample for golang github.com/mitchellh/copystructure v1.2.0: CopierFunc. The contract ran on go 1.26 · linux alpine/x64 · docker and passed…

sha256:a0c32604d0a9576604ee9356be07fdeb34d8477bc2df7185007df9e3555ff493

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 github.com/mitchellh/copystructure.CopierFunc in pkg:golang/github.com/mitchellh/copystructure@v1.2.0
Packages
Symbols
  • github.com/mitchellh/copystructure.CopierFunc
Created
2026-08-21T00:30:30Z

Contract

  1. copystructure.CopierFunc registered on Config.Copiers executes custom deep copy logic for a specified type
  2. copystructure.CopierFunc is recursively invoked when the registered type is nested within structs, slices, and maps
  3. copystructure.CopierFunc returning an error halts Config.Copy and propagates that exact error back to the caller
  4. Deep copying via copystructure.CopierFunc ensures mutations on the copied value do not affect the original source value

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