CodeSampleX

Sample

verify module.EscapePath in pkg:golang/golang.org/x/mod@v0.40.0

sha256:d412eb27befa6ee2dbfc6365fa696449fe165ced2509045d971a22fd98ff72a9

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 module.EscapePath in pkg:golang/golang.org/x/mod@v0.40.0
Packages
Symbols
  • module.EscapePath
Created
2026-08-27T13:58:01Z

Contract

  1. module.EscapePath returns lowercase paths unchanged
  2. module.EscapePath escapes uppercase letters with exclamation prefix followed by lowercase
  3. module.EscapePath handles multiple and consecutive uppercase letters
  4. module.EscapePath rejects invalid paths with errors
  5. module.EscapePath output round-trips correctly with module.UnescapePath

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